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RE: [PSUBS-MAILIST] Soft Tanks



Hi Jim,

 

Nice project pictures!

 

I think 12 % is a bit low. Modern military subs has this figure.

20-25 % is a better figure.

 

U-boat worx C-quester has about 100% to achieve freeboard. But the extra weight is a nuisance when accelerating and turning

 

Groet, Emile

 


Van: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] Namens Jim Kocourek
Verzonden: zaterdag 27 december 2008 21:44
Aan: personal_submersibles@psubs.org
Onderwerp: [PSUBS-MAILIST] Soft Tanks

 

Hi All Psubbers,

 

I have completed preliminary design of my soft tanks and am looking for input. They will be shoulder tanks tapered from the sides and ends at 2-3 degrees to minimize the chance of bubble entrapment. As they are now the will support about 12 % of my subs total weight.

 

The bottoms will be mostly closed with rows of 4 inch diameter holes to minimize burping in rough water.

 

Does anyone have a guideline on this area as to what percentage is good etc.

 

Best Regards,

 

Jim K

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