Advance & Transfer and other turning information

[Beardmoresam]

Hi,

Does anybody have any information on the Advance and Transfer of any of the fleet boats as well as their tactical & final diameters? Preferably for both surfaced and submerged.

Thanks, Sam.

[Sailor Steve]

I sure don't. TD for subs is something I've been scratching my head over for decades. :-?

[TorpX]

N. Friedman gives the 1942 'mean diameter of surface turning circle' as 370 yd. and submerged 'turning circle' as 300 yd.

Then he says the 1946 edition of Submarine Warfare Instructions gives the 'surface tactical diameter' as 500 yd at 15 kt and the 'submerged diameter' as 450 yd at 6 kt.

I am unsure about what he means in the first quote "'mean diameter". Did he mean the avg. of different trials, different classes, different speeds? For this reason, and because no speeds were given, I consider the second set of numbers to be more reliable.

No details were stated about transfer, or advance.

[Beardmoresam]

http://image.slidesharecdn.com/lesson-14-precise-piloting587/95/lesson-14-precise-piloting-11-728.jpg?cb=1182679474

Perhaps final diameter?

edit - I'm also trying to convert SH4Speech to British orders, such as "Half ahead both engines, revolutions 60". Wondering if there is a file that gives the speed vs shaft revolutions? so far, doing it manually for whatever class I'm using as part of my sea trials.

[TorpX]

I wouldn't worry too much about the subtle differences between 'turning circle', 'tactical diameter', and 'final diameter'. The game physics generally fall short of the real thing. If you can get things close to what they should be, you're doing well.

A bigger concern than the exact turning circle measurements, was the speed drop. The size of US subs' circles was ok, but the speed dropped to absurdly low levels. What good is having a decent turning radius, if your sub just crawls along pitifully?

Wondering if there is a file that gives the speed vs shaft revolutions?

IIRC, there is an entry in the *.sim file for rpm's. I briefly tried playing around with it, but it didn't seem to do anything. My suspicion was that it might have been tied to how much noise your boat made. I don't believe there is any mechanism that would permit you to order a certain number of turns on the shafts. Likewise, we cannot order different speeds on the port and starboard props. Too bad for us. :-?