Questions tagged [submarines]

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What are the factors determining position of forward dive planes on a submarine?

This question is restricted to nuclear submarines. The forward horizontal dive planes of nuclear submarines may be located either on the hull in front of the sail (as for seen in this cutaway of an ...
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2answers
63 views

How do center of gravity varies in submarine between surface and submerged?

I'm interesting in static* roll stability of submarines. I'm always tempted to compare submerged submarine to blimps and other bigger airships. For airships, roll stability is assured by a pendulum ...
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3answers
82 views

Is there a submarine that uses fewer than 4 rudders?

This question is restricted to post-WWII submarines designed to have a greater speed while submerged and to cruise underwater (unlike WWII U-boats). As highlighted in this question, there is no need ...
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1answer
72 views

What is the optimal building material for a submarine pressure hull?

I have a difficult and interesting design project to work on and I am trying to get my hands on some ballpark figures from people who know engineering a little better. Help is appreciated! I am ...
2
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2answers
190 views

Why did the Soviet Alfa-class submarines have a titanium hull?

My limited knowledge in engineering tells me: Titanium is expensive, stronger and heavier than aluminium, lighter and weaker than high yield steel. The most significant advantage of titanium is the ...
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3answers
3k views

X-form and cross-form rudders in underwater control

What are the advantages of using X-form rudders in comparison to cross-form rudders? Why do some submarines, torpedos and underwater autonomous vehicles use X-stern control? X-stern: Cross-form:
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1answer
621 views

Do submarines really have cranks for closing leaks?

It's common in submarine movies that when suffering some kind of shock (like a near miss by a torpedo or falling deep into a trench), water will start bursting into the cabin and the crew will run ...