أهلا وسهلا بك زائرنا الكريم، اذا كانت هذه زيارتك الأولى للمنتدى، فيرجى التكرم بالاطلاع على القوانين بالضغط هنا. كما يشرفنا أن تقوم بالتسجيل بالضغط هنا إذا رغبت بالمشاركة في المنتدى، أما إذا رغبت بقراءة المواضيع والإطلاع فتفضل بزيارة المواضيع التي ترغب.

البوارج من فئة ايوا (مجموعة ايوا المستقبلية)

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 البوارج من فئة ايوا (مجموعة ايوا المستقبلية)

استعرض الموضوع السابق استعرض الموضوع التالي اذهب الى الأسفل 
انتقل الى الصفحة : 1, 2  الصفحة التالية
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مُساهمةموضوع: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 15:20


انتجت الولأيات المتحدة الأمريكية اربع بوارج من هذه الفئة هى ايوا lowaBB-61 ونيوجيرسى New jersey
وميسورى MISSOURIBB63 وويسكنسن wisconsin وقد لجات الولأيات المتحدة الأمريكية لتصميم البوارج من هذه الفئة للتغلب على عيوب التسليح والتدريع والسرعة التى عانت منها البوارج من فئة ساوث داكوتا ونورث كارولأنا
فقد اعدت البوارج من فئة ايوا لمهمة مرافقة حاملة طائرات السريعة واستند تصميمها لتصميم الفئة ساوث كارولأينا ولكن مع تطوير البدن لأاستعاب المزيد من الألأت وكما وضع تصميم جديد للبوارج لأاستعاب المدافع عيار 406 مم المحسنة
ولكن ظل تدريع هذه الفئة من البوارج دون مستوى تدريع البارجة اليابانية والأنجيليزية المعاصرة لها كان تصميم الألأت ممتازا مااعطى هذه البوارج اعلى قدرة جزوع بين جميع البوارج السابقة لها على الأطلأق كما ان العناية التى بذلت فى تقسيم البدن الى مقاطع منفصلة وتامين الأتصال السريع بين مختلف الأجزاء اعتطت هذه البوارج قدرة ممتازة على وقف انتشار الأضرار الناتجة عن العمليات العسكرية اضافة للسرعة الكبيرة لهذه البوارج التى تعد عنصر امان اضافى لها اوصى على بناء اول بارجتين من الفئة ايوا مايو عام 1938 بينما اوصى على بناء البارجتين الأخيرتين فى يوليو 1939
بلد المنشا الولأيات المتحدة
الأستخدام بوارج ثقيلة قادرة على قتال لفترات ممتدة عبر جميع بحار العالم تعمل ضمن مجموعات قتال حاملأت الطائرات
او مجموعة الأبرار والأقتحام البحرى كما يمكنها تنفيذ مهام خاصة بمصاحبة سفن السطح المجهزة بوسائل
واسلحة دفاع الجوى وقتال الغواصات
الدول المستخدمة الولأيات المتحدة الأمريكية
المواصفات العامة والفنية
1-المواصفات العامة
الطاقم الطاقم 2637 فردا فى عام 1944
الطاقم 1921 فردا فى عام 1986
الطول خط العوم 262.7 متر
الأجمالى 270.4 متر
العرض الخارجى 32.9 متر
الغاطس 11.3 متر
الوزن القياسى 44.649 طن مترى فى عام 1944
46.007 طن مترى فى عام 1984
الحمولة كاملة 60.252 طن مترى فى عام 1944
58.274 طن مترى فى عام 1984
2-التسليح
عند البناء 9 مدافع عيار 406 مم بمدى 23 ميل بحرى
20 مدفع عيار 127 مم بمدى 9 اميال
80 مدفع مضاد للطائرات عيار 40 مم
49 مضاد للطائرات عيار 20 مم
عند اللأعادة للخدمة
9 مدافع عيار 406 مم
12 مدفع عيار 127 مم
اربعة انظمة للدفاع المركزى المضاد للطائرت والصواريخ فالنكس phalanax ciws
اربعة مجموعات ثمانية (4×8) من قوذف الصاروخ توماهوك
اربع مجموعات رباعية من (4×4) من قواذف الصاروخ هاربون
3- الذخائر
32 صاروخ توماهوك Bgm-109
16 صاروخ هاربون RGM-48
4- المعدات الأكترونية
1- رادار بحث جوى ثنائى الأبعاد من النوع SPS49
رادار مرابة سطحية من النوع SPS67
نظام ادارة النيران لصواريخ توماهوك نوع SWG-2
نظام ادارة النيران لصاروخ هاربون نوع SWG-1A
نظام ادارة المدفعية من النوع MK38
منظومة الأعاقة الأكترونية من النوع SLQ32V4
5- التدريع
الحزام الجانبى الرئيسى 307 مم
السطح الرئيسى 38 مم
السطح الثانى 135 مم
واجهة برج المدافع الثقيلة 432 مم
اجناب برج المدافع الثقيلة 241 مم
6- مصدر للطاقة
ثمانية مراجل بخارية من النوع بابكوك ويكلكوس Babcock and wilcox
ضغط البخار 39.72 كجم/سم2 عند 454.4 درجة مئوية
7- الأت الدفع
اربع توربيدات بخارية
عدد الجزوع اربعة
القدرة 212.000 حصان مكانيكى
السرعة 33 عقدة
المدى 18000ميل بحرى بسرعة 12 عقدة
البوارج من فئة ايوا
البارجة ميسورى MISSOURIBB63 مرت بالمراحل التالية

1-دخول حوض نيويوريك لبناء السفن 6 يناير 1941
2- نزول الى البحر 29 يناير 1944
3- بدء الخدمة 11 يونية 1944
4- الأحالة الى الأحتياط 26 فبراير 1955
5- صدور قرار باستدعائها الى الخدمة مرة اخرى مايو 1984
6- العودى الى الخدمة مايو 1986
7-انتهاء الخدمة 31 مارس 1992
البارجة وويسكنسن wisconsin BB-64 مرت بالمراحل التالية

1- دخل حوض فيلأدلفيا لبناء السفن 25 يناير 1941
2- النزول الى البحر 7 ديسمبر 1943
3- بدء الخدمة 16 ابريل 1944
4-الأحالة الى الأحتياط 1 يوليو 1984
5- العودة الى الخدمة 3 مارس 1951
6- انتهاء الخدمة 8 مارس 1958
7- بداية رفع الكفاءة فى حوض افوندال تمهيدا للعودة الى الخدمة 2 يناير 1987
8- العودة للخدمة للمرة الثالثة 22 اكتوبر 1988
9- التطوير فى حوض انجالز 5 سبتمبر 1989
10- انهاء الخدمة 15 اكتوبر 1996
93 93 93 93 93 99

مقاتل من صحراء
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الاستاذ امين

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 15:39

موضوع رائع بس يا تري ايه انواع البوارج الحديثة الموجودة حاليا ولا لا يوجد بوارج و يا تري ايه الفرق بين البارجة و الطراد و المدمرة و تحياتي اليك اخي العزيز و تقييم على مجهودك اخي العزيز
الرجوع الى أعلى الصفحة اذهب الى الأسفل
محب الكلاشنكوف

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 15:44

احلى بارجة في نضري بعد البسمارك و الياماتو هي الميسوري...
تم توقيع معاهدة استسلام اليابان على البارجة ميسوري..
تقييم على الموضوع يا سبيشل فورسس -هو انت اسمك ايه بالضبط؟؟-
الرجوع الى أعلى الصفحة اذهب الى الأسفل
الاستاذ امين

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الـبلد :
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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 16:02

يا محب كنت فاكرك حترد على اسالتي ههههههههههه و تحياتي اليك و جايلك يا نيودلهي
الرجوع الى أعلى الصفحة اذهب الى الأسفل
FALCON

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 16:51

@الاستاذ امين كتب:

موضوع رائع بس يا تري ايه انواع البوارج الحديثة الموجودة حاليا ولا لا يوجد بوارج و يا تري ايه الفرق بين البارجة و الطراد و المدمرة و تحياتي اليك اخي العزيز و تقييم على مجهودك اخي العزيز
منقول من رد العضو
[b]Inter1908


الكورفيت:
هي سفينة حربية صغيرة الحجم أقل من 2000 طن، تمتاز بالسرعة والخفة، مهمتها
الدفاع عن السواحل ومهاجمة السفن المعادية، سلاحها الأساسي هو الطوربيد.
مداها محدود ولا يمكنها خوض اعالي البحار

الفرقاطة:
يطلق اسم فرقاطة على كل سفينة حربية يمكنها خوض اعالي البحار ووزنها
يتراوح من 2000 الى 7000 طن، مهمتها الأساسية الدفاع والهجوم ضد الغواصات،
ويمكنها العمل لوحدها او مع الاسطول، حاليا هناك فرقاطات يمكنها الدفاع ضد
الطائرات، او مهاجمة اهداف ارضية، كما أن هناك فرقاطات تمتلك ميزة التخفي.

المدمرة:
مصطلح امريكي اساسا ولا تستعمله كل البحريات (في فرنسا يسمى فرقاطة ايضا)
هي سفينة حربية أكبر قليلا من الفرقاطة، مهمتها مرافقة الاسطول وتدمير سفن
العدو، وبخاصة سفن الطوربيد كالكورفيت، يمكنها ايضا تدمير اهداف جوية او
غواصات، غالبا لا تعمل المدمرة منفردة.

الطراد:
هو أكبر السفن الحربية بعد حاملات الطائرات، مهامه هجومية اساسا، يمكنه
ضرب الغواصات، الطائرات، السفن، وحتى الأهداف الأرضية، يشتق اسمه من
مطاردته لسفن العدو، ولا يوجد الا في البحريتين الامريكية والروسية.

البارجة: يطلق الاسم على كل سفن الاسطول الرئيسية، والتي تملك تدريع معتبر وقدرات مدفعية أو صاروخية.

كما هناك انواع أخرى من السفن، ككاسحات الالغام، حاملات الطائرات، سفن الانزال، سفن الدعم، وناقلات النفط.....
[/b]
الرجوع الى أعلى الصفحة اذهب الى الأسفل
الاستاذ امين

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 17:00

تسلم اخي فالكون انا كنت قريت الرد ده قبل كده و حدث عندي التباس لما ذكر اسم البارجة و احترت مين الاقوى البارجة ولا المدمرة و تحياتي اليك اخي العزيز فالكون و القاك منتصرين عند تاج محل هههههههه
الرجوع الى أعلى الصفحة اذهب الى الأسفل
Star Wars

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 18:08

@محب الكلاشنكوف كتب:
احلى بارجة في نضري بعد البسمارك و الياماتو هي الميسوري...
تم توقيع معاهدة استسلام اليابان على البارجة ميسوري..
تقييم على الموضوع يا سبيشل فورسس -هو انت اسمك ايه بالضبط؟؟-
اليك 25 25 25
قوة من البحرية الاميركية مجيد! الانضمام إلى بعثة تابعة للبحرية من دون ترك الراحة من منزلك أو مكتبك. بارجة شاشة 3D ميسوري يأخذك على سطح السفينة من السفن الحربية الأكثر شهرة في التاريخ البحري الذي كان من الحرب العالمية الثانية من خلال عملية عاصفة الصحراء. القاء نظرة فاحصة على مو العزيز والتمتع الرسوم المتحركة بشكل مذهل، مفصل للإبحار السفينة، والأمواج المتدفقة، وافراد الطاقم في مراكز وجودهم مشغول مع المهام اليومية.
رابط التحميل
الرجوع الى أعلى الصفحة اذهب الى الأسفل
Star Wars

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الـبلد :
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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 18:09

@الاستاذ امين كتب:

موضوع رائع بس يا تري ايه انواع البوارج الحديثة الموجودة حاليا ولا لا يوجد بوارج و يا تري ايه الفرق بين البارجة و الطراد و المدمرة و تحياتي اليك اخي العزيز و تقييم على مجهودك اخي العزيز
شكرا على المرور الرائع الأقوى من نواحى كثيرة هى البارجة فى قوة تدريع والأسلحة الكثيرة والمتنوعة
ولكن الضعف فى السرعة فى البارجة بسبب التدريع السميك وكثرة الأسلحة وهذا يجعلها هدف سهل 9
يمكن حمايتها بسفن صغيرة الحجم
الرجوع الى أعلى الصفحة اذهب الى الأسفل
tora

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 20:00

تقيم على الموضوع اخي الكريم +
بالنسبه للبوارج التي دخلت الخدمه مرة اخري فاظن على حسب معلوماتي المتواضعه ان للتدريب فقط ليس اكث و الدعم فقط و لا تنسي انها تاخذ مصاريف تشغيل ماهوله في الوقت التي هناك بعض السفن التي تصرف اقل و يمكن ات تعطي نتائج مثلها فهي للتدريب مثل مصر عندها بعض البوارج على ح علمي و تستخدمها للتدريب
الرجوع الى أعلى الصفحة اذهب الى الأسفل
karl roman poli

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 20:14

اي واحدة منهم شاركت في فيلم باتل شيب 2012
الرجوع الى أعلى الصفحة اذهب الى الأسفل
Nbn-123

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 20:34


موضوع جميل وغني بالمعلومات

++

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كــــــــــريم زين الدين

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مـــلازم



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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 20:41

شكرا Mr.Special forces
على الموضوع الجميل
كنت امل ان تتعمق اكثر لتثري الموضوع بالمعلومات
وان تضيف لها البوارج العامل حاليا مثلا
اضن ان ميسوري شاركت فى حرب الخليج ايضا
تحياتي Mr.Special forces
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maiser

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   السبت 15 سبتمبر 2012 - 20:48


البوارج لم تعد احد اعمدة الحروب البحرية كما كان من قبل...دورها الان من وجهة نظرى يأتى فى المرتبة قبل الاخيرة..." الاخيرة طبعا هى المدمرات "..
منذ موقعة ايلات والاهتمام بالحجم اخذ فى الصغر فى مقابل الاهتمام بالتسليح والسرعة والمناورة واخيرا وليس اخرا الخفاء..!
طبعا ما عدا حاملات الطائرات.." دى ركن لوحدها كدا "..
موضوع جميل يا عزيزى...تحياتى .
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لمين الجزائري

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   الأحد 16 سبتمبر 2012 - 0:12

سلام

موضوع جميل اخي سبيسيال فورص ولك تقييم+
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Diaboo

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   الأحد 16 سبتمبر 2012 - 3:20

موضوع جميا و لك تقييم
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Ali niss

المشرف العام
فريق

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متصل

مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   الأحد 16 سبتمبر 2012 - 10:03

حقبة وانتهت واصبح اليوم هو عالم الكورفيت و الفرقاطة

سابقا



الان


تقيم اخى ++




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الاستاذ امين

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   الأحد 16 سبتمبر 2012 - 11:55

اعتقد اخي كارل انها الميسوري اللي اشتركت في فيلم باتل شيب بس اخي العزيز مايسر ليه قللت من قوة المدمرة مع انها تعتبر اقوى تاني قطعة بحرية بعد حالمة الطائرات و اعتقد انها مازات تلعب دورا هام حتي وقتنا الحاضر و اتمنى وجود مدمرات في البحرية المصرية
الرجوع الى أعلى الصفحة اذهب الى الأسفل
Ahmadyaya

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   الأحد 16 سبتمبر 2012 - 15:25

الوليات المتحده في الوقت الحالي تعمل علي استعاده المدفعيه البحريه مري اخري لضرب اهداف بريه ثابته بتكلفه رخيصه نظرا لارتفاع منظومات الصواريخ المنطلقه من منصات بحريه
شكرا
تقييم
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Field marshal

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   الأحد 16 سبتمبر 2012 - 17:33



ايوا تطلق مدافع عيار 406mm مع مدافع عيار 127mm

مدافع 127mm


مدفع عيار 40mm على متن يو اس اس نيو جيرسي في عام 1944


افراد الطاقم في غرفة المحركات الرئيسية على متن نيو جيرسي.


افراد طاقم تشغيل المولدات الكهربائية في غرفة المحركات المستوى العلوي على متن نيو جيرسي.


تجديدها فى الثمانينيات
التوماهوك على متن نيو جيرسي.


قواذف الهاربون


Gunfire-control radars aboard USS Iowa


ايوا خلال الحرب الكوريه


نيو جيرسي تقصف مواقع خلال حرب فيتنام.


ميسوري تطلق المدافع في جين تشونغ ، كوريا، 21 أكتوبر 1950


ويسكونسن تطلق صاروخ توماهوك



موضوع رائع اخى Mr.Special forces
تقبل عليه تقييمى وتقبل مرورى

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محمد علام

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   الإثنين 17 سبتمبر 2012 - 12:47

هذه البوارج كانت احدي اعمدة القوات البحرية الامريكية واحد اهم مظاهر القوة البحرية الاقوي في العالم لعقود طويلة ، ولكم ان تعرفوا معلومة مهمة جدا لم يذكرها الموضوع وهي ان البوارج ايوا حصلت علي لقب World's Greatest Naval Ship اي اعظم سفينة حربية في التاريخ ، لما تمتعت به من سرعة عالية وتدريع ممتاز ومدافع ضخمة ، وحرص الامريكيين علي احتفاظها مواكبة للتكنولوجيا فترات وفترات حتي ظلت في الخدمة 50 عاما من عام 1941 الي 1991 .

علي مدي هذا التاريخ الطويل خاضت السفينة الكثير من المعارك والعديد من الحروب فمثلا في 14 نوفمبر 1943 كانت علي موعد مع اول تحدي وكان تحدي خطير للغاية حيث ان الرئيس الامريكي وقتها فرانكلين روزفلت كان علي متنها بعدما ترك يخته الرئاسي (USS Potomac) عند مصب نهر بوتوماك ، لم يكن الرئيس وحده حيث كان يصحبه وزير الخارجية كورديل هال وهيئة الاركان المشتركة لعقد اجتماع سري مع رئيس الوزراء البريطاني ونستون تشرشل والرئيس السوفيتي جوزيف ستالين والصيني شيانج كاي شيك - باختصار كان قادة الحلفاء في مكان واحد ولو غرق ستتحول الحرب تماما - وكان مقر المؤتمر العاصمة الايرانية طهران ، وبناء علي طلب روزفلت قامت السفينة بتدريب مضاد للطائرات لاثبات كفاءة القطعة الجديدة في البحرية الامريكية امام حلفائه ، وكذلك فعلت السفن المرافقة لايوا ، واحدة منها كانت المدمرة ويليم بوتر ، والتي اجرت تدريب اطلاق طوربيدات ، وعن طريق الخطأ وقعت الكارثة طوربيد انطلق عن طريق الخطأ من بوتر وانطلق رأسا نحو ايوا .

قرر قائد بوتر كسر الصمت اللاسلكي وابلاغ ايوا بالخطر المحدق القادم نحوها ، وبسرعة قامت ايوا بالاستدارة بشكل عنيف لتلقي الاصابة ، ابلغ الرئيس اثناء الاجتماع وطلب الخروج ليري علي ارض الواقع ماحدث ، نجح الطاقم وتفادي الطوربيد ونجا قادة الحلفاء في واقعة تاريخية يجب ان تذكر عندما نتحدث عن هذه البوارج ، وفي 16 ديسمبر اعادت السفينة روزفلت الي الولايات المتحدة في عمل كان خير بداية لها .



واشتركت بوارج ايوا في " الحرب الكورية - حرب فيتنام - قصفت بيروت عام 1984 - كانت رأس حربة العمليات الحربية الامريكية في الحرب الباردة ولو ذكرنا مافعلته في هذه الفترة لاحتجنا الي موضوع جديد " وبلغ العدد الاجمالي الذي صنع من هذه الفئة 6 قطع ، ولمن لايعلم فلقد عملت هذه السفينة كحاملة طائرات صغيرة للغاية ولفترة قصيرة من عام 1943 : 1969 ولم تكن حاملة طائرات بالمعني المعروف للكلمة ، كان بها مقاليع للطائرات من نوع vought و cs seahawk وهذه صورة لها :



هذه الصور التاريخية لايمكن ان نغفل معها اهم صورة في الحرب العالمية الثانية وهي صورة توقيع اليابان لوثيقة الاستسلام علي متن القطعة uss missouri :



وبعد ذلك نتجه الي احد مصادر فخر وقوة فئة ايوا وهي انها شاركت وبفاعلية في حرب الخليج الاولي 1991 بالقطعتين uss missouri و uss wisconsin وفي 17 يناير 1991 اطلقت القطعة الاولي اولي صواريخها من التوماهوك ضد المواقع العراقية في تمام الثانية الا ثلث صباحا وفي 29 يناير قصفت موقعا للقيادة والتحكم في الجيش العراقي علي الحدود مع السعودية ، وحاول العراقيين اغراقها فأطلقوا صاروخين silkworm صباح 23 فبراير بعدما قامت باطلاق اكثر من 130 طلقة ضد مواقعهم ، احد الصاروخين اخطأ الهدف والاخر تصدت له السفينة البريطانية الرائعة الامكانيات hms gloucester بصاروخ seadart اسقطه علي بعد 640 متر من مقدمة السفينة ، كما قامت الميسوري بتدمير 15 لغم بحري عراقي اثناء الحرب ، وان كان يؤخذ عليها اطلاق نار خطأ اصاب فرقاطة بيري مصاحبه لها .

الشقيقة uss wisconsin شاركت جنبا الي جنب مع ميسوري لاول مرة منذ الحرب الكورية وكما فعلت الميسوري اطلقت هي ايضا صواريخ التوماهوك ضد المواقع العراقية ، كما اصابت بواسطة مدفعها هدف علي بعد 31 كم منها تمثل في قطعة مدفعية عراقية وقامت طائرة ov-10 باضاءة الهدف لها ، وقامت ويسكنسون بضرب مواقع المدفعية ومنصات الصواريخ ومعدات الحرب الالكترونية العراقية علي طول الساحل ، وكانت ايضا مصيبة علي رأس العراقيين عندما قامت بمفردها باصابة 15 قارب حربي عراقي وتركتهم بين غارق او مصاب ودمرت عدة ارصفة في ميناء عسكري ، وهذه صورة لاقلاع طائرة بدون طيار من علي متنها :



ووضعت الحرب اوزارها وبعد نهايتها ان لهذه العائلة ان تستريح وهي في يومنا هذا متحف مفتوح لعامة الجمهور الامريكي بعد ان قامت في ثمانية شهور تواجد بالخليج العربي ب 348 ساعة طيران بدون طيار ، 661 هبوط مروحي ، اطلقت 319 دانة من المدفع عيار 410 مم و 24 صاروخ توماهوك ، لتكون ختامة رائعة لهذا التاريخ المشرف لهذه البوارج .
الرجوع الى أعلى الصفحة اذهب الى الأسفل
AdhamAnwar

مســـاعد أول
مســـاعد أول



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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   الإثنين 17 سبتمبر 2012 - 14:12

هل هى تم تفكيكها ولا يمكن ان تعود للخدمة مرة اخرى
الرجوع الى أعلى الصفحة اذهب الى الأسفل
محمد علام

مشرف سابق
لـــواء

مشرف سابق  لـــواء



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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   الإثنين 17 سبتمبر 2012 - 16:18

@AdhamAnwar كتب:
هل هى تم تفكيكها ولا يمكن ان تعود للخدمة مرة اخرى

السفن لم تفكك هي الان متاحف عائمة وليس لها اي دور قتالي .
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الاستاذ امين

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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   الإثنين 17 سبتمبر 2012 - 16:43

برضه مصر يا اخ علام اعرف ايه هو اللي كامينج سون في توقيعك و ايه سبب الاختفاء الطويل ده يا تري بسبب الكامينج سون هههههههههههههههه و تحياتي اليك
الرجوع الى أعلى الصفحة اذهب الى الأسفل
Star Wars

عقـــيد
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مُساهمةموضوع: Iowa class battleship   الثلاثاء 18 سبتمبر 2012 - 22:24


The Iowa-class battleships were a class of fast battleships ordered by the United States Navy in 1939 and 1940 to escort the Fast Carrier Task Forces that would operate in the Pacific Theater of World War II. Six were ordered during the course of World War II, but only four were completed in time to see service in the Pacific Theater. The last two had been laid down, but as a result of the postwar draw down of the armed forces they were canceled prior to completion and eventually scrapped. Like other third-generation American battleships, the Iowa class followed the design pattern set forth in the preceding North Carolina- and South Dakota-class battleships, which placed great emphasis on speed as well as on the secondary and anti-aircraft batteries. The Iowa class ships were also the longest examples of their type ever built, although other battleships were built with wider beams and higher displacementsBetween the mid-1940s and the early 1990s the Iowa-class battleships were involved in four major wars fought by the United States. In World War II, they defended aircraft carriers and shelled Japanese positions. During the Korean War, the battleships provided seaborne artillery support for United Nations forces fighting against North Korea, and in 1968 New Jersey shelled Viet Cong and Vietnam People's Army military forces in the Vietnam War. All four were reactivated and armed with missiles during the 1980s as part of the 600-ship Navy initiative; in 1991 Missouri and Wisconsin fired missiles and 16-inch (406 mm) guns at Iraqi targets during the First Gulf War. The U.S. Navy decommissioned all four battleships in the early 1990s with the end of the Cold War due to their high maintenance costs.
Initially, all four battleships were removed from the Naval Vessel Register; however, the United States Congress compelled the Navy to reinstate two of the four battleships on the grounds that existing naval gunfire support would be inadequate for amphibious operations. This resulted in a lengthy debate over whether battleships should have a role in the modern navy. Meanwhile, the battleships struck from the Naval Vessel Register were slated to be donated to not-for-profit organizations. With the transfer of Iowa in 2012, all four battleships of the Iowa-class now operate as part of their associated non-profit maritime museums across the United States.
Background
the first study in early 1938 at the direction of Admiral Thomas C. Hart, head of the General Board. It was an expanded South Dakota, carrying either twelve 16-inch/45 caliber Mark 6 guns or nine 18-inch (460 mm) guns—the latter armament being dropped after the 31 March agreement—with more armor and a power plant large enough to drive the larger ship through the water at the same speed as the South Dakotas, 27 knots (50 km/h; 31 mph). These studies had no further impact on the design of the Iowa class, but development of this design continued and eventually evolved into the design for the Montana class
Another design, pursued by the Design Division section of the Bureau of Construction and Repair, was a "cruiser-killer." Beginning on 17 January 1938 under Captain A.J. Chantry, the group drew up plans for ships with twelve 16-inch and twenty 5-inch guns, Panamax capability but otherwise unlimited displacement, a top speed of 35 knots (65 km/h; 40 mph) and a range of 20,000 nautical miles (37,000 km; 23,000 mi) when traveling at the more economical speed of 15 knots (28 km/h; 17 mph). Their plan fulfilled these requirements with a ship of 50,940 long tons (51,760 t), but Chantry believed that more could be done if the ship were to be this large; with a displacement greater than that of most battleships, its armor would only have protected it against the 8-inch (203 mm) weapons carried by heavy cruisers
Three improved plans—"A", "B", and "C"—were designed at the end of January. An increase in draft, vast additions to the armor,[N 2] and the substitution of twelve 6-inch (150 mm) guns in the secondary battery was common between the three designs. "A" was the largest, at 59,060 long tons (60,010 t), and was the only one to still carry the twelve 16-inch guns in four triple turrets. It required 277,000 shaft horsepower (shp) to make 32.5 knots (60.2 km/h; 37.4 mph). "B" was the smallest at 52,707 long tons (53,553 t); like "A" it had a top speed of 32.5 knots, but "B" only required 225,000 shp to make this speed. It also carried only nine 16-inch guns, in three triple turrets. "C" was similar but it added 75,000 shp (for a total of 300,000 shp), to make the original requirement of 35 knots. The weight required for this and a longer belt—512 feet (156 m), compared with 496 feet (151 m) for "B"—meant that the ship was 55,771 long tons (56,666 t)
In March 1938, the General Board followed the recommendations of the Battleship Design Advisory Board, which was composed of the naval architect William Francis Gibbs, William Hovgaard (then president of New York Shipbuilding), John Metten, Joseph W. Powell, and the long-retired Admiral and former Chief of the Bureau of Ordnance Joseph Strauss. The board requested an entirely new design study, focusing on increasing the size of the 35,000 ton South Dakota class. The first plans made for this indicated that 30 knots (35 mph; 56 km/h) was possible on a displacement of about 37,600 long tons (38,200 t). 33 knots (38 mph; 61 km/h) could be bought with 220,000 shaft horsepower and a displacement of around 39,230 long tons (39,860 t), which was well below the treaty's maximum limit of 45,000 long tons (46,000 t)
These designs were able to convince the General Board that a reasonably well-designed and balanced 33-knot (61 km/h) battleship was possible within the terms of the "escalator clause". However, further studies revealed major problems with the estimates. The speed of the ships meant that more freeboard would be needed both fore and amidships, the latter requiring an additional foot of armored freeboard. Along with this came the associated weight in supporting these new strains: the structure of the ship had to be reinforced and the power plant enlarged to avoid a drop in speed. In all, about 2,400 long tons (2,400 t) had to be added, and the large margin the navy designers had previously thought they had—roughly 5,000 long tons (5,100 t)—was suddenly vanishing
With the additional displacement, the General Board was incredulous that a tonnage increase of 10,000 long tons (10,000 t) would only allow the addition of 6 knots (11 km/h; 6.9 mph)s over the South Dakotas. Rather than retaining the 16"/45 caliber Mark 6 gun used in the South Dakotas, they ordered that future studies would have to include the more powerful (but heavier) 16"/50 caliber Mark 2 guns left over from the canceled Lexington-class battlecruisers and South Dakota-class battleships of the early 1920s. It also allowed the draft of the ships to be increased, meaning that the ships could be shortened (lowering weight) and the power reduced (since a narrower beam reduces drag)
The 50-caliber gun weighed some 400 long tons (410 t) more than the 45 caliber did; the barbette size also had to be increased so the total weight gain was about 2,000 long tons (2,000 t), putting the ship at a total of 46,551 long tons (47,298 t)—well over the 45,000 long ton limit. An apparent savior appeared in a Bureau of Ordnance preliminary design for a turret that could carry the 50 caliber guns in a smaller barbette. This breakthrough was shown to the General Board as part of a series of designs on 2 June 1938.
However, the Bureau of Ordnance continued working on a larger barbette design, while the Bureau of Construction and Repair utilized the smaller barbettes in the final planning of the new battleships. As the bureaus were independent of one another, they did not realize that the two plans could not go together until November 1938, when the design was in the final stages of refinement. By this time, the ships could not use the larger barbette, as it would require massive alterations to the design and would result in substantial weight penalties. The General Board was astounded; one member asked the head of the Bureau of Ordnance if it had occurred to him that Construction and Repair would have wanted to know what turret his subordinates were working on "as a matter of common sense". A complete scrapping of plans was only avoided when designers within the Bureau of Ordnance were able to design a new 50-caliber gun, the Mark 7, that was both lighter and smaller in outside diameter; this allowed it to be placed in a turret that would fit in the smaller barbette.
The redesigned 3-gun turret, equipped as it was with the Mark 7 naval gun, provided an overall weight saving of nearly 850
long tons (860 t) to the overall design of the Iowa class
In May 1938 the United States Congress passed the Second Vinson Act which "mandated a 20% increase in strength of the United States Navy". The act was sponsored by Carl Vinson, a Democratic Congressman from Georgia who was Chairman of the House Naval Affairs and Armed Services Committee. The Second Vinson Act updated the provisions of the Vinson-Trammell Act of 1934 and the Naval Act (1936), which had "authorized the construction of the first American battleships in 17 years", based on the provisions of the London Naval Treaty of 1930; this act provided the funding to build the Iowa class.
As 1938 drew to a close the design of the Iowas was nearly complete, but it would continuously evolve as the battleships were under construction. These revisions included changing the design of the foremast, replacing the original 1.1"/75-caliber guns that were to be used for anti-aircraft work with 20 mm and 40 mm guns, and moving the combat information center into the armored hull. Additionally, in November 1939 the New York Navy Yard greatly modified the internal subdivision of the machinery rooms, as tests had shown the underwater protection in these rooms to be inadequate. The result of this was clearly beneficial: "The prospective effect of flooding was roughly halved and the number of uptakes and hence of openings in the third deck greatly reduced." Although the changes meant extra weight and added 1 foot (0.30 m) to the beam, this was no longer a major issue; the United Kingdom and France had renounced the Second London Naval Treaty soon after the beginning of the Second World War
Design
Armor

Like all battleships, the Iowas carried heavy armor protection against shellfire and bombs with significant underwater protection against torpedoes. The Iowas' armor scheme was modeled on that of the preceding South Dakota class, and designed to give a zone of immunity against fire from 16-inch/45-caliber guns between 18,000 and 30,000 yards (16,000 and 27,000 m) away. The magazines and engine rooms were protected by an armored belt 12.2 inches (310 mm) thick, which sloped to give an effective vertical thickness of 13.5 inches (340 mm). Their armor was not sufficient to protect against guns equivalent to their own 16-inch/50-caliber guns; increasing the armor would have increased weight and reduced speedMissouri and Wisconsin incorporated the most significant change in armor from the South Dakota class: the increase from 11.3 inches (290 mm) to 14.5 inches (370 mm) of the vertical armor on the forward armored bulkhead, the conning tower, and the turret barbettes. The extra armor provided protection from fire directly ahead, which was considered more likely given the high speed of the Iowa classThe installation of armor on the Iowa-class battleships also differed from those of earlier battleships in that the armor was installed while the ships were still "on the way" rather than after the ships had been launched
The Iowa class torpedo defense was virtually the same as the South Dakota's. Each side of the ship was protected below the waterline by two tanks mounted outside the belt armor, and separated by a bulkhead. These tanks were initially planned to be empty, but in practice were filled with water or fuel oil. The armored belt tapered to a thickness of 4 inches (100 mm) below the waterline. Behind the armored belt there was a void, and then another bulkhead. The outer hull was intended to detonate a torpedo, with the outer two compartments absorbing the shock and with any splinters or debris being stopped by the armored belt and the empty compartment behind it. In 1939 the Navy discovered that this system was considerably less effective than earlier torpedo defense systems, but by then it was too late to change the designBased on hard-learned lessons in the Pacific theater concerns were also raised over the ability of the armor on these battleships to withstand the effects of aerial bombing, but at the time these concerns surfaced nothing could be done to adequately address the problem

The primary guns used on these battleships are the nine 16-inch (406 mm) / 50-caliber Mark 7 naval guns, a compromise design developed to fit inside the barbettes. These guns fire explosive– and armor-piercing shells, and can fire a 16-inch (410 mm) shell approximately 23.4 nautical miles (40 km)The guns are housed in three 3-gun turrets: two forward and one aft, in a configuration known as "2-A-1". The guns are 66 feet (20 m) long (50 times their 16-inch (410 mm) bore, or 50 calibers from breechface to muzzle). About 43 feet (13 m) protrudes from the gun house. Each gun weighs about 239,000 pounds (108,000 kg) without the breech, or 267,900 pounds (121,500 kg) with the breechThey fire projectiles weighing from 1,900 to 2,700 pounds (850 to 1,200 kg) at a maximum speed of 2,960 ft/s (820 m/s up to 20 miles (32 km). At maximum range, the projectile spends almost 1½ minutes in flight. The maximum firing rate for each gun is two rounds per minuteEach gun rests within an armored turret, but only the top of the turret protrudes above the main deck. The turret extends either four decks (Turrets 1 and 3) or five decks (Turret 2) down. The lower spaces contain rooms for handling the projectiles and storing the powder bags used to fire them. Each turret required a crew of between 85 and 110 men to operate
The turrets are not actually attached to the ship but sit on rollers, although they do have retaining clips. The original cost for each turret was US$1.4 million, but this figure does not take into account the cost of the guns themselves
The turrets are "three-gun", not "triple" because each barrel can be elevated independently; they can also be fired independently. The ship could fire any combination of its guns, including a broadside of all nine.
The large-caliber guns were designed to fire two different conventional 16-inch (406 mm) shells: the armor-piercing Mk. 8 round for anti-ship and anti-structure work, and the Mk. 13 high-explosive round designed for use against unarmored targets and shore bombardment
Interestingly, when firing the same conventional shell, the 16"/45 caliber Mark 6 gun used by the fast battleships of the North Carolina-class and South Dakota-class had a slight advantage over the 16"/50 caliber Mark 7 gun when hitting deck armor—a shell from a 45 cal gun would be slower, meaning that it would have a steeper trajectory as it descended. At 35,000 yards (20 mi; 32 km), a shell from a 45 cal would strike a ship at an angle of 45.2 degrees, as opposed to 36 degrees with the 50 cal. The Mark 7 had a greater maximum range over the Mark 6: 23.64 miles (38.04 km) vs 22.829 iles (36.740 km).
In the 1950s, the W23, an adaptation of the W19 nuclear artillery shell was developed specifically for the 16-inch (406 mm) guns. The shell had an estimated yield of 15 to 20 kilotons of TNT (63,000 to 84,000 GJ)
and its introduction made the Iowa-class battleship's 16 in guns the world's largest nuclear artillery,and made these four battleships the only U.S. Navy ships ever to have nuclear shells for naval guns.Although developed for exclusive use by the battleship's guns it is not know if any of the Iowa-class battleships actually carried these shells while in active service due to the United States Navy's policy of refusing to confirm or deny the presence of nuclear weaponry aboard its ships In 1991 the United States unilaterally withdrew all of its nuclear artillery shells from service, and dismantling of the U.S. nuclear artillery inventory is said to have been completed in 2004
The Iowas carried ten twin enclosed base ring mounts supporting 5 in/38 caliber Mark 28 Mod 0 guns. Originally designed to be mounted upon destroyers built in the 1930s, these guns were so successful that they were added to a myriad of American ships during the Second World War, including every major ship type and many smaller warships constructed between 1934 and 1945. They were considered to be "highly reliable, robust and accurate" by the Navy's Bureau of Ordnance Each 5 in/38 weighed almost 4,000 pounds (1,800 kg) without the breech; the entire mount weighed 156,295 pounds (70,894 kg). It was 223.8 inches (5,680 mm) long overall, had a bore length of 190 inches (4,800 mm) and a rifling length of 157.2 inches (3,990 mm). The gun could fire shells at about 2,500–2,600 ft/s (762–792 m/s); about 4,600 could be fired before the barrel needed to be replaced. Minimum and maximum elevations were −15 and 85 degrees respectively. The guns' elevation could be raised or lowered at about 15 degrees per second. The mounts closest to the bow and stern could aim from −150 to 150 degrees; the others were restricted to −80 to 80 degrees. They could be turned at about 25 degrees per second The 5 in/38 functioned as a dual purpose gun; that is, it was able to fire at both surface and air targets with a reasonable degree of success. However, this did not mean that it possessed inferior anti-air abilities. As proven during 1941 gunnery tests conducted aboard USS North Carolina (BB-55) the gun could consistently shoot down aircraft flying at 12,000–13,000 feet (2.3–2.5 mi; 3.7–4.0 km), twice the effective range of the earlier single purpose 5"/25 caliber anti-air gun. As Japanese airplanes became faster, the gun lost some of its effectiveness in the anti-aircraft role; however, toward the end of the war its usefulness as an anti-aircraft weapon increased again because of an upgrade to the Mark 37 Fire Control System and proximity-fused 5-inch (130 mm) shells The 5 in/38 gun would remain on the battleships for the ships' entire service life; however, the total number of guns and gun mounts was reduced from 20 guns in ten mounts to 12 guns in 6 mounts during the 1980s' modernization of the four Iowa's. The removal of four of the gun mounts was required for the battleships to be outfitted with the armored box launchers needed to carry and fire Tomahawk missiles. At the time of the 1991 Gulf War, these guns had been largely relegated to littoral defense for the battleships. Since each battleship carried a small detachment of Marines aboard, the Marines would man one of the 5 in gun mounts.[42]
At the time of their commissioning, all four of the Iowa-class battleships were equipped with 20 quad 40 mm mounts and 49 single 20 mm mounts
Second World War, entered service in 1941 and replaced the 0.50"/90 (12.7 mm) M2 Browning MG on a one-for-one basis. Between December 1941 and September 1944, 32% of all Japanese aircraft downed were credited to this weapon, with the high point being 48.3% for the second half of 1942; however, the 20 mm guns were found to be ineffective against the Japanese Kamikaze attacks used during the latter half of World War II and were subsequently phased out in favor of the heavier 40 mm Bofors AA guns
When the Iowa-class battleships were commissioned in 1943 and 1944 they carried twenty quad Bofors 40 mm anti-aircraft gun mounts, which they used for defense against enemy aircraft. These heavy guns were also employed in the protection of allied aircraft carriers operating in the Pacific Theater of World War II, and accounted for roughly half of all Japanese aircraft shot down between 1 October 1944 and 1 February 1945 Although successful in this role, the guns were stripped from the battleships—initially from New Jersey when reactivated in the 1960s and later from Iowa, Missouri, and Wisconsin when they were reactivated for service in the 1980s
Propulsion


When the Second Vinson Act was passed by the United States Congress in 1938, the U.S. Navy moved quickly to develop a 45,000-ton battleship that would pass through the 110 ft (34 m) wide Panama Canal. Drawing on a 1935 empirical formula for predicting a ship's maximum speed based on scale-model studies in flumes of various hull forms and propellers and a newly developed empirical theorem that related waterline length to maximum beam, the Navy drafted plans for a battleship class with a maximum beam of 108 ft (33 m) which, when multiplied by 7.96, produced a waterline length of 860 ft (262 m)—permitting a maximum speed of 34.9 knots (64.6 km/h)
The Navy also called for the class to have a lengthened forecastle and amidship, which would increase speed, and a bulbous bow. The Iowas were to be outfitted with four screws: the outer pair consisting of two four-bladed propellers roughly 18 feet (5.5 m) in diameter and the inboard screws that have five blades and are roughly 17.5 feet (5.3 m) in diameter. The propeller designs were adopted after earlier testing had determined that propeller cavitation caused a drop in efficiency at speeds over 30 knots (56 km/h) The engineering plant on Iowa and Missouri consisted of four General Electric cross-compound steam turbine engines, each driving a single shaft. The equivalent machinery on New Jersey and Wisconsin was provided by Westinghouse Four fire rooms contained eight Babcock & Wilcox M-Type boilers operated at 600 pounds per square inch (4,137 kPa; 42 kgf/cm2) with a maximum superheater outlet temperature of 875 °F (468 °C). Steam was normally transmitted to four engine rooms. Each room was numbered from 1 to 4; each engine room was aft of its associated fire room. In normal steaming four boilers were operated; this was sufficient to power the ships at speeds up to 27 knots (50 km/h; 31 mph). For higher speeds, all eight boilers were lit.
Electricity drove many systems aboard ship, including rotating the turrets and elevating the guns. Each of the four engine rooms had a pair of Ship's Service Turbine Generators (SSTGs)
manufactured by Westinghouse. Each SSTG generated 1.25 MW for a total of 10 MW of electricity. The SSTGs were powered by steam from the same boilers that fed the engines. To allow battle-damaged electrical circuits to be repaired or bypassed, the lower decks of the ship had a Casualty Power System whose large three-wire cables and wall outlets (called "biscuits") could be used to re-route power.
Aircraft (1943–1969)


When they were commissioned during World War II, the Iowa-class battleships came equipped with two aircraft catapults designed to launch floatplanes. Initially, the Iowas carried the Vought OS2U Kingfisher and Curtiss SC Seahawk, both of which were employed to spot for the battleship's main gun batteries—and, in a secondary capacity, perform search-and-rescue missions. By the time of the Korean War, helicopters had replaced floatplanes and the Sikorsky HO3S-1 helicopter; in time, the newer UH-1 Iroquois, SH-2 Seasprites, CH-46 Sea Knight, CH-53 Sea Stallion and the LAMPS III SH-60B Seahawk would serve aboard the battleships. In addition, New Jersey made use of the Gyrodyne QH-50 DASH drone for her Vietnam war deployment in 1968–1969
The Iowa class were the only battleships with the speed required for post-war operations based around fast aircraft carrier task forces. There were a number of proposals in the early Cold War to convert the class to take into account changes in technology and doctrine. These included plans to equip the class with nuclear missiles, add aircraft capability and—in the case of Illinois and Kentucky—a proposal to rebuild both as aircraft carriers instead of battleships
Initially, the Iowa class was to consist of only four battleships: Iowa, New Jersey, Missouri, and Wisconsin. However, changing priorities during World War II resulted in the battleships Montana and Ohio being reordered as Illinois and Kentucky respectively. At the time these two battleships were to be built a proposal was put forth to have them constructed as aircraft carriers rather than fast battleships. The plan called for the ships to be rebuilt to include a flight deck and an armament suite similar to that placed aboard the Essex-class aircraft carriers that were at the time under construction in the United States
Ultimately, nothing came of the design proposal to rebuild these two ships as aircraft carriers and they were cleared for construction as fast battleships to conform to the Iowa class design, though they differed from the earlier four that were built. Eventually, the Cleveland-class light cruisers were selected for the aircraft-carrier conversion. Nine of these light cruisers would be rebuilt as Independence-class light aircraft carriers
After the surrender of the Empire of Japan, construction on Illinois and Kentucky stopped. Illinois was eventually scrapped, but Kentucky's construction had advanced enough that several plans were proposed to complete Kentucky as a guided missile battleship (BBG) by removing the aft turret and installing a missile system. A similar conversion had already been performed on the battleship Mississippi (BB-41/AG-128) to test the RIM-2 Terrier missile after World War II.
One such proposal came from Rear Admiral W. K. Mendenhall, Chairman of the Ship[s] Characteristics Board (SCB); Mendehall proposed a plan that called for $15–$30 million to be spent to allow Kentucky to be completed as a guided-missile battleship (BBG) carrying eight SSM-N-8 Regulus II guided missiles with a range of 1,000 nautical miles (1,900 km; 1,200 mi). He also suggested Terrier or RIM-8 Talos launchers to supplement the AA guns and proposed nuclear (instead of conventional) shells for the 16-inch guns
This never materialized, and Kentucky was ultimately sold for scrap in 1958, although her bow was used to repair her sister Wisconsin after a collision
In 1954 the Long Range Objectives Group of the United States Navy suggested converting the Iowa-class ships to BBGs. In 1958 the Bureau of Ships offered a proposal based on this idea. This replaced the 5-inch and 16-inch gun batteries with "two Talos twin missile systems, two RIM-24 Tartar twin missile systems, an RUR-5 ASROC antisubmarine missile launcher, and a Regulus II installation with four missiles" as well as flagship facilities, sonar, helicopters, and fire-control systems for the Talos and Tartar missiles. In addition to these upgrades, 8,600 additional [long] tons of fuel oil was also suggested to serve in part as ballast for the battleships and for use in refueling destroyers and cruisers. Due to the estimated cost of the overhaul ($178–$193 million) this proposal was rejected as too expensive; instead, the SCB suggested a design with one Talus, one Tartar, one ASROC and two Regulus launchers and changes to the superstructure, at a cost of up to $85 million. This design was later revised to accommodate the Polaris Fleet Ballistic Missile, which in turn resulted in a study of two schemes by the SCB. In the end, none of these proposed conversions for the battleships were ever authorized Interest in converting the Iowa-class battleships into guided-missile battleships began to deteriorate in 1960, because the hulls were considered too old and the conversion costs too high. Nonetheless, additional conversion proposals—including one to install the AN/SPY-1 Aegis Combat System radar on the battleships—were suggested in 1962, 1974 and 1977 but as before, these proposals failed to gain the needed authorization.
This was due, in part, to the fact that sensitive electronics within 200 ft of any 16-inch gun muzzle were likely to be damaged
1980s refit

create a 600-ship Navy—which would counter the new Soviet Kirov-class battlecruisers all four of the battleships were reactivated and modernized. During this reactivation, several concepts entailing removal of the aft 16 turret were considered by the Navy, including Martin Marietta's proposal to replace the turret with servicing facilities for 12 AV-8B Harrier STOVL jumpjets, Charles Myers' proposal for replacement of the turret with vertical launch systems for missiles and a flight deck for Marine helicopters. Naval Institute Proceedings proposed a canted flight deck (complete with a steam catapult) and arrestor wires to operate F/A-18 Hornet fighters. Plans for these conversions were dropped in 1984
but each battleship was overhauled to burn navy distillate fuel and modernized to carry electronic warfare suites, close-in weapon systems (CIWS) for self-defense, and missiles After recommissioning, the modernized battleships operated as centerpieces of their own battleship battle groups (BBBGs), consisting of one Ticonderoga-class cruiser, one Kidd-class destroyer or Arleigh Burke-class destroyer, one Spruance-class destroyer, three Oliver Hazard Perry-class frigates and one support ship, such as a fleet oiler
Armament


During their modernization in the 1980s each Iowa-class battleship was equipped with four of the US Navy's Phalanx CIWS mounts, two of which sat just behind the bridge and two which were next to the after ship's funnel. Iowa, New Jersey, and Missouri were equipped with the Block 0 version of the Phalanx, while Wisconsin received the first operational Block 1 version in 1988. The Phalanx system is intended to serve as a last line of defense against enemy missiles and aircraft, and when activated can engage a target with a 20 mm (0.79 in) M61 Vulcan 6-barreled Gatling cannon at a distance of approximately 3.6 km (2.2 mi) As part of their modernization in the 1980s, each of the Iowa-class battleships received a complement of Armored Box Launchers and "shock hardened" Mk. 141 quad cell launchers. The former was used by the battleships to carry and fire the BGM-109 Tomahawk Land Attack Missiles (TLAMs) for use against enemy targets on land, while the latter system enabled the ships to carry a complement of RGM-84 Harpoon anti-ship missiles for use against enemy ships. With an estimated range of 675 nautical miles (1,250 km; 777 mi) to 1,500 nautical miles (2,800 km; 1,700 mi for the Tomahawk missile and 64.5 nautical miles (119.5 km; 74.2 mi) to 85.5 nautical miles (158.3 km; 98.4 mi) for the Harpoon missile system, these two missile systems displaced the sixteen-inch guns and their maximum range of 42,345 yards (38,720 m) (24.06 mi
to become the longest-ranged weapons on the battleships during the 1980s. It has been alleged by members of the environmental group Greenpeace
that the battleships carried the TLAM-A (also cited, incorrectly, as the TLAM-N)—a Tomahawk missile with a variable yield W80 nuclear warhead—during their 1980s service with the United States Navy, but owing to the United States Navy's policy of refusing to confirm or deny the presence of nuclear weaponry aboard its ships, these claims can not be conclusively proved
Owing to the original 1938 design of the battleships, the Tomahawk missiles could not be fitted to the Iowa-class unless the battleships were rebuilt in such a way as to accommodate the missile mounts that would be needed to store and launch the Tomahawks. This realization prompted the removal of the anti-aircraft guns previously installed on the Iowas and the removal of four of each of the battleships' ten 5"/38 DP mounts. The mid and aft end of the battleships were then rebuilt to accommodate the missile magazines. At one point, the NATO Sea Sparrow was to be installed on the reactivated battleships; however, it was determined that the system could not withstand the overpressure effects from firing the main battery To supplement the anti-aircraft capabilities of the Iowas, five FIM-92 Stinger surface-to-air missile firing positions were installed. These secured the shoulder-launched weapons and their rounds for ready use by the crew
Electronics


radar during World War II. They were located on the mainmast and forward fire-control tower of the battleships, respectively. As the war drew to a close, the United States introduced the SK-2 air-search radar and SG surface-search radar; the Iowa class was updated to make use of these systems between 1945 and 1952. At the same time, the ships' radar systems were augmented with the installation of the SP height finder on the main mast. In 1952, AN/SPS-10 surface-search radar and AN/SPS-6 air-search radar replaced the SK and SG radar systems, respectively. Two years later the SP height finder was replaced by the AN/SPS-8 height finder, which was installed on the main mast of the battleships. During their brief period of activity under the 600-ship Navy program, the battleships' radar systems were again upgraded. The AN/SPS-6 air-search radar system was replaced with the AN/SPS-49 radar set (which also augmented the existing navigation capabilities on the battleships), and the AN/SPS-8 ground-search radar set was replaced by the AN/SPS-67 search radar
variety of fire control systems for their gun systems, and later for their missile systems. Beginning with their commissioning, the battleships made use of a trio of Mk 38 gun fire control systems to direct the 16 in guns and a quartet of Mk 37 gun fire control systems to direct the 5 in gun batteries. These systems were upgraded over time, but remained the cornerstones of the combat radar systems on the Iowa class during their careers. The range estimation of these gunfire control systems provided a significant accuracy advantage over earlier ships with optical rangefinders; this was demonstrated off Truk Atoll on 16 February 1944 when Iowa engaged the Japanese destroyer Nowaki at a range of 35,700 yards (32.6 km) and straddled her, setting the record for the longest-ranged straddle in history
Initially, the battleships made use of a mass collection of 20 mm and 40 mm guns for anti-aircraft (AA) operations; these guns were respectively augmented with the Mk 14 range sight and Mk 51 fire control system to improve accuracy. By the Korean War, jet engines had replaced propellers on aircraft, which severely limited the ability of the AA batteries and their gun systems to track and shoot down enemy planes. Consequently, the AA guns and their associated fire-control systems were removed when reactivated. New Jersey received this treatment in 1967, and the others followed in their 1980s modernizations. In the 1980s, each ship also received a quartet of Phalanx Close In Weapon System (CIWS) mounts which made use of a radar system to locate incoming enemy projectiles and destroy them with a 20 mm gatling gun before they could strike the ship
With the added missile capacity of the battleships in the 1980s came additional fire-support systems to launch and guide the ordnance. To fire the Harpoon anti-ship missiles, the battleships were equipped with the SWG-1 fire-control system, and to fire the Tomahawk missiles the battleships used either the SWG-2 or SWG-3 fire-control system. In addition to these offensive-weapon systems, the battleships were outfitted with the AN/SLQ-25 Nixie to be used as a lure against enemy torpedoes, an SLQ-32 electronic warfare system that can detect, jam, and deceive an opponent's radar and a Mark 36 SRBOC system to fire chaff rockets intended to confuse enemy missiles Aside from the electronics added for weaponry control, all four battleships were outfitted with a communications suite used by both cruisers and guided missile cruisers in service at the time This communication suite included the OE-82 antenna for satellite communications, but did not include the Naval Tactical Data System
Aircraft (1982–1992)

During the 1980s these battleships made use of the RQ-2 Pioneer, an unmanned aerial vehicle employed in spotting for the guns. Launched from the fantail using a rocket-assist booster that was discarded shortly after takeoff, the Pioneer carried a video camera in a pod under the belly of the aircraft which transmitted live video to the ship so operators could observe enemy actions or fall of shot during naval gunnery. To land the UAV a large net was deployed at the back of the ship; the aircraft was flown into it. Missouri and Wisconsin both used the Pioneer UAVs successfully during Operation Desert Storm, and in one particularly memorable incident
a Pioneer UAV operated by Wisconsin received the surrender of Iraqi troops during combat operations This particular Pioneer was later donated to the Smithsonian Institution, and is now on public display During Operation Desert Storm these Pioneers were operated by detachments of VC-6
In addition to the Pioneer UAVs, the recommissioned Iowas could support six types of helicopters: the Sikorsky HO3S-1, UH-1 Iroquois, SH-2 Seasprites, CH-46 Sea Knight, CH-53 Sea Stallion and the LAMPS III SH-60B Seahawk
Gunfire support role

Following the 1991 Gulf War and the subsequent Dissolution of the Soviet Union, the United States Navy began to decommission and mothball many of the ships it had brought out of its reserve fleet in the drive to attain a 600-ship Navy. At the height of Navy Secretary John F. Lehman's 600-ship Navy plan, nearly 600 ships of all types were active within the Navy. This included fifteen aircraft carriers, four battleships and over 100 submarines, along with various other types of ships the overall plan specified. When the Soviet Union collapsed in 1991 the Navy sought to return to its traditional, 313-ship composition.While reducing the fleet created under the 600-ship Navy program, the decision was made to deactivate the four recommissioned Iowa-class battleships and return them to the reserve fleet In 1995, the decommissioned battleships were removed from the Naval Vessel Register (NVR) after it was determined by ranking US Navy officials that there was no place for a battleship in the modern navy In response to the striking of the battleships from the Naval Vessel Register a movement began to reinstate the battleships, on the grounds that these vessels had superior firepower over the then-existing 5 in guns found on the Spruance-class destroyers, Kidd-class destroyers, Arleigh Burke-class destroyers, and Ticonderoga-class cruisers Citing concern over the lack of available gunfire to support amphibious operations, Congress demanded that the United States Navy reinstate two battleships to the naval vessel register and maintain them with the mothball fleet, until the Navy could certify it had gunfire support within the current fleet that would meet or exceed the battleship's capability
The debate over battleships in the modern navy continued until 2006, when the two reinstated battleships were stricken after naval officials submitted a two-part plan that calls for the near-term goal of increasing the range of the guns currently in use on the Flight I Arleigh Burke-class destroyers with specially designed ammunition intended to allow a five-inch projectile fired from these guns to travel an estimated 40 nautical miles (70 km) inland
The long-term goal calls for the replacement of the two battleships with vessels of the as-yet-unconstructed Zumwalt class of guided-missile destroyers. These ships are to be outfitted with an advanced gun system (AGS) that will fire specially developed 6 in Long Range Land Attack Projectiles for shore bombardment however, the long-term goal for the Zumwalt class is to have the ships mount railguns or free-electron lasers
Cultural significance

The Iowa class has become culturally symbolic in the United States in many different ways, to the point where certain elements of the American public—such as the United States Naval Fire Support Association—are unwilling to part with the battleships despite their apparent obsolescence in the face of modern naval combat doctrine that places great emphasis on air supremacy and missile firepower. Although all have been officially struck from the Naval Vessel Register they have been spared scrapping and were donated for use as museum ships Their service records have added to their fame, ranging from their work as carrier escorts in World War II to their shore bombardment duties in North Korea, North Vietnam, and Iraq, as well as their service in the Cold War against the expanded Soviet Navy. Their reputation combined with the stories told concerning the firepower of these battleships' 16 inch guns are such that when they were brought out of retirement in the 1980s in response to increased Soviet Naval activity—and in particular, in response to the commissioning of the Kirov-class battlecruisers—the United States Navy was inundated with requests from former sailors pleading for a recall to active duty so they could serve aboard one of the battleships
In part because of the service length and record of the class, members have made numerous appearances in television shows, video games, movies, and other media oriented mediums, including appearances in the anime series Neon Genesis Evangelion the History (TV channel)|History Channel documentary series Battle 360: USS Enterprise,[107] the Discovery Channel documentary The Top 10 Fighting Ships, the stealth action game Metal Gear Solid 4: Guns of the Patriots,[109] the Real Time Tactics game World in Conflict, the book turned movie A Glimpse of Hell the 1989 song by Cher If I Could Turn Back Time, the 1992 film Under Siege, and the 2012 film
Battleship among other appearances. Japanese rock band Vamps performed the finale of their 2009 US tour on board the USS Missouri on September 19, 2009
Ships
When brought into service during the final years of World War II, the Iowa-class battleships were assigned to operate in the Pacific Theatre of World War II. By this point in the war, aircraft carriers had displaced battleships as the primary striking arm of both the United States Navy and the Imperial Japanese Navy. As a result of this shift in tactics, U.S. fast battleships of all classes were relegated to the secondary role of carrier escorts and assigned to the Fast Carrier Task Force to provide anti-aircraft screening for U.S. aircraft carriers and perform shore bombardment They were recalled in 1950 with the outbreak of the Korean War, and provided naval artillery support for U.N. forces for the entire duration of the war before being returned to mothballs in 1955 after hostilities ceased. In 1968, to help alleviate U.S. air losses over North Vietnam New Jersey was summoned to Vietnam, but was decommissioned a year after arriving. All four returned in the 1980s during the drive for a 600-ship Navy to counter the new Soviet Kirov-class battlecruisers only to be retired after the collapse of the Soviet Union on the grounds that they were too expensive to maintain only to be retired after the collapse of the Soviet Union on the grounds that they were too expensive to maintain
USS Iowa (BB-61)

Iowa was ordered 1 July 1939, laid down 27 June 1940, launched 27 August 1942, and commissioned 22 February 1943. She conducted a shakedown cruise in Chesapeake Bay before sailing to Naval Station Argentia, Newfoundland, to be ready in case the German battleship Tirpitz entered the Atlantic. Transferred to the Pacific Fleet in 1944, Iowa made her combat debut in February and participated in the campaign for the Marshall Islands. The ship later escorted U.S. aircraft carriers conducting air raids in the Marianas campaign, and then was present at the Battle of Leyte Gulf. During the Korean War, Iowa bombarded enemy targets at Songjin, Hŭngnam, and Kojo, North Korea. Iowa returned to the U.S. for operational and training exercises before being decommissioned on 24 February 1958
Reactivated in the early 1980s, Iowa operated in the Atlantic Fleet, cruising in North American and European waters for most of the decade and participating in joint military exercises with European ships
On 19 April 1989, 47 sailors were killed following an explosion in her No. 2 turret.[126] In 1990, Iowa was decommissioned for the last time and placed in the mothball fleet. She was stricken from the Naval Vessel Register on 17 March 2006. Iowa was anchored as part of the National Defense Reserve Fleet in Suisun Bay, California until October 2011, when she was towed from her mooring to Richmond, California for renovation as a museum ship. She was towed from Richmond and San Francisco Bay on 26 May 2012, to San Pedro in Los Angeles Harbor to serve as a museum ship and opened to the public on 7 July 2012.
USS New Jersey (BB-62)

New Jersey was ordered 4 July 1939, laid down 16 September 1940, launched 7 December 1942, and commissioned 23 May 1943. New Jersey completed fitting out and trained her initial crew in the Western Atlantic and Caribbean before transferring to the Pacific Theatre in advance of the planned assault on the Marshall Islands, where she screened the U.S. fleet of aircraft carriers from enemy air raids. At the Battle of Leyte Gulf, the ship protected carriers with her anti-aircraft guns. New Jersey then bombarded Iwo Jima and Okinawa. During the Korean War, the ship pounded targets at Wonsan, Yangyang, and Kansong. Following the Armistice, New Jersey conducted training and operation cruises until she was decommissioned. Recalled to duty in 1968, New Jersey reported to the gunline off the Vietnamese coast, and shelled North Vietnamese targets before departing the line in December 1968. She was decommissioned the following year Reactivated in 1982 under the 600-ship Navy program, New Jersey was sent to Lebanon to protect U.S. interests and U.S. Marines, firing her main guns at Druze and Syrian positions in the Beqaa Valley east of Beirut Decommissioned for the last time 8 February 1991, New Jersey was briefly retained on the Naval Vessel Register before being donated to the Home Port Alliance of Camden, New Jersey for use as a museum ship in October 2001
USS Missouri (BB-63)

The Missouri was the last of the four Iowa-class battleships to be completed. She was ordered 12 June 1940, laid down 6 January 1941, launched 29 January 1944, and commissioned 11 June 1944. Missouri conducted her trials off New York with shakedown and battle practice in Chesapeake Bay before transferring to the Pacific Fleet, where she screened U.S. aircraft carriers involved in offensive operations against the Japanese before reporting to Okinawa to shell the island in advance of the planned landings. Following the bombardment of Okinawa, Missouri turned her attention to the Japanese homeland islands of Honshu and Hokkaido, performing shore bombardment and screening U.S. carriers involved in combat operations. She became a symbol of the U.S. Navy's victory in the Pacific when representatives of the Empire of Japan boarded the battleship to sign the documents of unconditional surrender to the Allied powers in September 1945. After World War II, Missouri conducted largely uneventful training and operational cruises until suffering a grounding accident. In 1950 she was dispatched to Korea in response to the outbreak of the Korean War. Missouri served two tours of duty in Korea providing shore bombardment. She was decommissioned in 1956. Reactivated twenty-eight years later in 1984 as part of the 600-ship Navy plan, Missouri was sent on operational cruises until being assigned to Operation Earnest Will in 1988. In 1991, Missouri participated in Operation Desert Storm, firing 28 Tomahawk Missiles and 759 sixteen-inch (406 mm) shells at Iraqi targets along the coast Decommissioned for the last time in 1992, Missouri was donated to the USS Missouri Memorial Association of Pearl Harbor, Hawaii, for use as a museum ship in 1999
USS Wisconsin (BB-64)

Wisconsin was ordered 12 June 1940, laid down 25 January 1942, launched 7 December 1943, and commissioned 16 April 1944. After trials and initial training in Chesapeake Bay, she transferred to the Pacific Fleet in 1944 and was assigned to protect the U.S. fleet of aircraft carriers involved in operations in the Philippines until summoned to Iwo Jima to bombard the island in advance of the Marine landings. Afterward, she proceeded to Okinawa, bombarding the island in advance of the allied amphibious assault. In mid-1945 Wisconsin turned her attention to bombarding the Japanese home islands until the surrender of Japan in August. Reactivated in 1950 for the Korean War, Wisconsin served two tours of duty, assisting South Korean and UN forces by providing call fire support and shelling targets. In 1956, the bow of the uncompleted USS Kentucky was removed and grafted on Wisconsin, which had collided with the destroyer USS Eaton
Decommissioned in 1958, Wisconsin was placed in the reserve fleet at the Philadelphia Naval Shipyard until reactivated in 1986 as part of the 600-ship Navy plan. In 1991, Wisconsin participated in Operation Desert Storm, firing 24 Tomahawk Missiles at Iraqi targets, and expending 319 16-inch (406 mm) shells at Iraqi troop formations along the coast. Decommissioned for the last time 30 September 1991, Wisconsin was placed in the reserve fleet until struck from the Naval Vessel Register on 17 March 2006 so she could be transferred for use as a museum ship. Wisconsin is currently berthed at the Nauticus maritime museum in Norfolk, Virginia
Illinois and Kentucky

Hulls BB-65 and BB-66 were originally to be Montana and Ohio, the first and second ships of the Montana-class of battleships however, passage of an emergency war building program on 19 July 1940 resulted in both hulls being reordered as Iowa-class battleships to save time on construction
Illinois was ordered on 9 September 1940 and laid down on 15 January 1945. Construction was canceled on 11 August 1945, when Illinois was judged to be about-one quarter completed she was sold for scrap in September 1958
Kentucky was ordered on 9 September 1940 and laid down on 6 December 1944. Construction was suspended on 17 February 1947, when Kentucky was judged to be approximately three-quarters completed. She was informally launched on 20 January 1950 to clear a dry-dock for repairs to Missouri, which had run aground. In 1956, Kentucky's bow was removed and shipped in one piece across Hampton Roads, where it was grafted onto the Wisconsin, which had collided with the destroyer Eaton In 1958, Kentucky's engines were salvaged and installed on the fast combat support ships Sacramento and Camden Initially, proposals were made to complete these two battleships as aircraft carriers, similar in design to the Essex-class aircraft carriers under construction at the time in the United States, however nothing came of this idea When construction on the ships was halted at the end of World War II proposals were made to rebuild Kentucky as a guided missile battleship (changing the hull number to BBG-1) but again these plans were never realized. Ultimately, Kentucky was sold for scrap on 31 October 1958

References






















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مُساهمةموضوع: رد: البوارج من فئة ايوا (مجموعة ايوا المستقبلية)   الأربعاء 19 سبتمبر 2012 - 10:11

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