Technology and Operations
This forum is for discussing technological & operational matters pertaining to U-boats.
RE:measures and countermeasures.
Posted by:
Rainer Bruns
()
Date: July 01, 2000 03:20AM
Hi Robert,
couple answers to you questions:
1) German subs carried oxygen cylinders aboard, allowing the ChEng. to mix oxygen in the used up air. Otherwise every opportunity was taken to keep the boat ventilated with blowers once on the surface.
2) If a naval architect can concentrate the required horsepower on one shaft, he will always prefer that for sake of efficiency. In port maneuverability will suffer. (Modern subs require tug assistance often while docking - a WW2 subdriver would be mortified to ask for tugs). Russian Boomer Taiphoon notable exception: twin screw; but it is sooo big - its practically to large siamese subs side by side.
3) Modern subs are more manouverable below than on the surface. Also faster, making waves on the surface creates horsepower-eating drag. Don't think of imbalance, think of what is the pupose of its being: Hide out there under the surface and do decisive damage to the target.
4) Variant of the cruciform tail is X-version. Very tricky, in a way similar to the V-tail of a F-117. Practically can't fly the thing under water without computer.
Cheers, RB.
couple answers to you questions:
1) German subs carried oxygen cylinders aboard, allowing the ChEng. to mix oxygen in the used up air. Otherwise every opportunity was taken to keep the boat ventilated with blowers once on the surface.
2) If a naval architect can concentrate the required horsepower on one shaft, he will always prefer that for sake of efficiency. In port maneuverability will suffer. (Modern subs require tug assistance often while docking - a WW2 subdriver would be mortified to ask for tugs). Russian Boomer Taiphoon notable exception: twin screw; but it is sooo big - its practically to large siamese subs side by side.
3) Modern subs are more manouverable below than on the surface. Also faster, making waves on the surface creates horsepower-eating drag. Don't think of imbalance, think of what is the pupose of its being: Hide out there under the surface and do decisive damage to the target.
4) Variant of the cruciform tail is X-version. Very tricky, in a way similar to the V-tail of a F-117. Practically can't fly the thing under water without computer.
Cheers, RB.
