[PSUBS-MAILIST] Seehund Aft Dive Tank

[Joe Perkel via Personal_Submersibles]

As an example of my delving into this particular subject, I am having a bit of trouble trying to understand the nature of the aft diving tank (No.1) on the original Seehund. Understanding this well, is key to an appropriate attempt for a viable facsimile.

I've attached an image of where I'm unclear. I suspect that the uppermost volume of this tank was encased in what looks like a double hull void, but I can not quite confirm this. Also in question are the following with my analysis, supposition or questioning.


1) Is this a double hull in this aft conical section?   (Raising CB, lowering CG)
2) Position of the vent valve?    (Is this due to dive angle?)
3) "J" trap nature of bottom of assembly in keel section of tank?    (Anti-syphon?)
4) Coiled hose assembly in section view?? (completely at a loss here?)

Comment's and suggestions are sincerely appreciated. What's on my mind is the temptation and viability of reproduction in reduced scale. Sea Hunter's lines are pleasing and close to scale in section @ 36"OD for the hull, 24" for the CT/Sail assembly and No. 14 pipe for the torpedo/battery pod assemblies. (Can get away with No. 12 as well).

Cliff's wonderful .xls requires that I draw up an accurate model first in order to simulate ballasting.

Joe
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