Not on me as i'm in work

. Rossler's 'The U-Boat' has a chapter on the Walter boats, and it shows line drawings/cutawys of all the actual/proposed H2O2 U-Boats.
The big ocean going Type XVIII Walter Boat was the basis for the TypeXXI, so if anybody wanted to model the Type XVIII, they could use the TypeXXI, all they would need to do to the in-game model would be to add condensor inlets/outlets to the rear of the model, around where the diesel room is in the TypeXXI.
As for actually making the design 'work' properly i.e. give it sustained, high-speed underwater performance, thats another matter alltogether

. My question was mainly aimed at this i.e. can SH3's files be modded to allow this kind of performance.
Sniper_1