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Сообщение от CrazyIvan
Alfa - Max depth about 500 meters.
It is an easy Sub, actually hull not thick.
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Сообщение от Гена
Several russian issues show that Alfa has crush depth 400-600 m and operational depth 300-450 m.
Titanium hull itself doesn't guarantee 800 m depth. Sierra has titanium hull but her crush depth is 600 m. Mike sub (built in 1984) with over 1000 m depth had not only titanium hull but moreover number of unique technical decisions such as main ballast tanks inside pressure hull, minimum number of holes/vents, abcense of torpedo loading hatch,etc. Lots of research were done many full/half scale compartments models were built for high pressure testing. And all these meres were done after first Alfa has been designed (built in 1971).
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Yes I think I was mistaken.
I don't have access to russian pubblications (and even if I could I wouldn't understand them since I don't speak and read russian) but I have an english book called
"Cold War Submarines" by Norman Polmar.
At page 281 he writes :
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Design of Soviet Navy's third-generation nuclear torpedo-attack submarines (SSN) began at 1971 at TsKB Lazurit. Titanium was specified for the design, continuing the developments of a key technology of Projects 661/Papa and 705/Alfa. Beyond reducing submarine weight, titanium would provide a greater test depth in third generation SSns - 1970 feet (600m) - which would be coupled with other SSN advances, including improved quieting, weapons, and sensors.....
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So you and CrazyIvan are both correct.
The mystery remains though, why are western publications such as jane's continuing to use the 800m test depth estimate for the Alfa ?
Its obviously wrong and many people continue to believe the Alfa has a 800m operating depth.
