عندك حق وشكرا على النصيحة الغالية
هذا مقال صغير عن الدولفين والفارق بينها وبين اليو 212
وهذا أهم مقطع به
The German Type 209 diesel electric submarine is the most popular export-sales submarine in the world, and sales continue as smaller nations modernize their aging fleets. Greece was the first country to order this type of submarine from Howaldtswerke-Deutsche Werft AG (HDW) of Kiel, Germany, and the first batch of these submarines entered service in 1971. The 1,200-ton Type 209 submarine is a hunter killer submarine that India purchased from HDW, Germany. The initial contract was for 2 submarines to be sold and for 4 more to be constructed at the Mazagaon docks in Mumbai. The deal however went sour when it was hit by a bribery scandal, after the first four ships were delivered to the Indian Navy.
Advances in electric drive and power conditioning were introduced into the German Type 212. This German submarine has low and balanced signatures including acoustic signatures, longer submerged mission capability and a modern combat system with sophisticated sensors and state of the art torpedoes. The technologies inherent in this design include a fuel cell air independent propulsion (AIP) system with a back up single diesel generator, highly modular arrangements of critical areas and the frame carrying the diesel generator and auxiliary equipment such as the hydraulic pumps, compressors, etc.- is enclosed in a sound absorbent capsule and isolated from the pressure hull. The AIP system utilized is more commonly called 'MESMA'. Translated it means Autonomous Submarine Energy Module and was developed for submarines.
The 1,720-ton Dolphin class is evidently somewhat larger than the 1,500-ton Type 212 submarines, and incorporates a conventional diesel-electric propulsion system rather than the AIP system.
The detection that the submarines were equipped with two types of torpedo tubes (533mm and 650mm respectively) fueled speculation that the submarine might have a possible nuclear role, given that 533mm torpedo tubes would have been sufficient for the weaponry that was to be installed on board.
الغواصات القادمة هناك إشاعات عن تزويدها بنظام AIP يعتمد على الخلايا الهيدروجينية ومحرك كهربى صامت (‘نتاج سيمنس ) مماثل للموجود فى U212 ,وفى تلك الحالة ستكون أكثر صمتا من الدولفين الحالية وأكثر قدرة على البقاء غاطسة لكن لن تصل لهدوء ال U212 لكن لاننسى أنها تتفوق عليها فى الحمولة وقواذف ال 650 ملم المخصصة للبوب آى المزود بمحرك تربوفان
In November 2005, it was announced that Germany would allow the sale of two new Dolphin Class submarines to Israel. In July 2006, Israel placed a contract for two additional Dolphin submarines with an option on a third. The new submarines will have air-independent propulsion (AIP) systems, which allow them to stay submerged for a much longer period. Delivery of the first vessel is expected in 2012.
