While we're talking submerged...What's the max depth a torp can be launched from using sound?...without coming out of the water like an SSN (that's gotta be a ride)...

Torpedo depth
 

I think you'll find that periscope depth is required for a WW2 attack, perhaps that goes to 100 ft. I have not experimented to find out. You will get a message when too deep.

WW2 subs were not expected to be ASW platforms, but to attack surface vessels. A few subs were sunk by others, but usually when surfaced or at periscope depth.

It depends on the mod, in stock its about 100 ft like Raymond said. In TMO and (I Think) RFB its about 140-150 ft. After that the tube doors won't open.

Thanks for the info. Playing 1.5 w/RFB2+april upgrade and easyplot...SK

In TMO you can fire in Gato/Balao and Tench class down to 150 feet , then too deep to launch.In pre Gato subs its 100 feet i believe.

That's a shame because the factory specs for Cuties was not to fire them above 199 feet. Obviously we aren't mirroring the capabilities of the real subs even at this late date...

Reality
 

I think it is realistic to have the limits mentioned. As we have all seen in real life, specs are wishful thinking. To be able to fire is one thing, but to get a hit another. WW2 torpedoes were also prone to failures.

At least two were hit by their own torpedoes.

The deep firing, without scope, would be like a shot in the dark due to the primitive nature of the sound equipment. Torpedoes were expensive too.

I think I read somewhere that each torpedo was costing about the same as the average family home in America.

Each torp cost about $10k

199 feet? I wonder what the sea pressure would be on the inner tube door at that depth.

103.125 psi :D

http://www.calctool.org/CALC/other/games/depth_press

So the total pressure on the inner door of a 21" tube at 199 feet would be 11,369.53 pounds.

Next question, obviously is, can the door withstand that much pressure?