[PSUBS-MAILIST] Varible ballast tank

[hank pronk via Personal_Submersibles]

Brian,I have done that exactly with an aluminum CO2 tank and drilled the hole in the flat bottom.  The material is very thick on the flat bottom and it was easy to tap.Hank 

    On Sunday, December 4, 2016 9:37 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
 

 Hi All,    I'm thinking of using a scuba tank as a inside the hull ballast tank, has this been done before?   I was going to lay it horizontally and tap a hole in the top and one at the bottom, so I can drain it better and control the elimination of the water better. I would have a valve arrangement where I could push the water out the bottom with HP air.  And also when filling I could vent the air in the tank into the cabin. Brian
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