Sub physics - experts needed - Page 7

Dr.Sid · 11-19-07, 09:10 AM

I'm tuning my first simple movement model for my subsim. I'm trying to set it to some realistic behavior. There is however too many things I don't know. So I have few questions.

I found on internet some data about subs, for example good old 688. I have weight, size, engine power, maximum speed. Now this alone is almost enough for much of the simulation. But not all, and I also need as much real data as possible to see if my model indeed is realistic. I'd like to know:

1) Acceleration at different speeds, especially at 0.
2) How long the subs takes to stop after engines are cut off.
3) Does sub have screw with variable pitch ? How is it used exactly ?
4) What is the turning rate at different speeds ? How much rudder is needed to achieve this ?
5) Why do subs have lower max speed on the surface ?
6) How is the depth controlled ? How much does the tanks, how much the planes ? How strong effect trim tanks has ? How are they used ? How are the common surface and dive procedures from these aspects ?

Please don't wild guess. I can do that too. I want some real info, with references, if possible.

11-19-07, 09:10 AM	#1
Dr.Sid The Old Man Join Date: May 2005 Location: Czech Republic Posts: 1,458 Downloads: 6 Uploads: 0	Sub physics - experts needed I'm tuning my first simple movement model for my subsim. I'm trying to set it to some realistic behavior. There is however too many things I don't know. So I have few questions. I found on internet some data about subs, for example good old 688. I have weight, size, engine power, maximum speed. Now this alone is almost enough for much of the simulation. But not all, and I also need as much real data as possible to see if my model indeed is realistic. I'd like to know: 1) Acceleration at different speeds, especially at 0. 2) How long the subs takes to stop after engines are cut off. 3) Does sub have screw with variable pitch ? How is it used exactly ? 4) What is the turning rate at different speeds ? How much rudder is needed to achieve this ? 5) Why do subs have lower max speed on the surface ? 6) How is the depth controlled ? How much does the tanks, how much the planes ? How strong effect trim tanks has ? How are they used ? How are the common surface and dive procedures from these aspects ? Please don't wild guess. I can do that too. I want some real info, with references, if possible.