RE: [PSUBS-MAILIST] K350 Main Tanks

Really nice! I would like to suggest a couple of ideas.

1) It looks like you have a flat bulkhead closing off the end of each tank that faces the hull. If that is so, could you mount the tank a little further from the hull, bolted from beneath, and avoid the strap attachment method? The strap method is both leak-prone and a pain for disassembly. At least in my experience, removing the tanks when they are attached with a strap invariably leads to repainting part of the hull. Your sub would end up a little longer, but I think would be much better if you could could avoid the straps. You could bend a rectangular sheet to bridge the gap between each MBT and the hull, put a couple of holes in it, and leave that space free flooding.

2) Use that lip to bolt on a flat cover underneath, and put large diameter pipe downward about a foot. You can easily attach the down pipe with nothing but a hole saw and nylon bathtub drain fittings.

Both these ideas are part of the design for my next boat, based on K-250 experiences.

Thanks,

Alec

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From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of James Frankland
Sent: Tuesday, September 06, 2011 12:23 PM
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] K350 Main Tanks