I completed hydro-testing today on a prototype tank based on the design I mentioned a few weeks ago.
In summary, no leakage or damage was observed after 2 cycles to 750 psi. There looks to be a small amount of permanent deformation in the center of the bulkheads (~0.005 inches) but nothing to worry about. While assembling the parts, as the o-ring slid past the tank wall holes, it shredded some small pieces off. I didn't debur the inside hole edge as well as I could have so I'll clean them up a bit and see if it helps.
Discussion is at: http://www.watzlavick.com/robert/rocket/ photos are at: http://www.watzlavick.com/robert/rocket/rocket1/photos/index.html -Bob
