Ha, Rocket 1. I was giving the Copenhagen guys a hard time last week about un-creatively calling their huge new building "HAB 2". That's an impressive set of parts. Did you do anything special in analyzing the design of the shaft seal? I usually avoid that style of seal design because the operating pressure is trying to unseal it, but I haven't done the calc to see how the pressure compares to the preload. Ben On Sun, Nov 17, 2013 at 9:15 PM, Robert Watzlavick <rocket@xxxxxxxxxxxxxx> wrote: > 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 > >