RE: [PSUBS-MAILIST] Large ballast volume

["Jens Laland" <laland@artematrix.org>]

Brian

Here's some food for thought (and experimentation in a somewhat smaller
scale), i.e. how to make and use a homemade plywood double-action piston
pump to blow air, ref:

http://www.oism.org/nwss/s73p940.htm

Best regards,
Jens Laland




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