Sean Patrick Daly wrote:
SPD> I have been concentrating on the piston tank design so far, as it suits my SPD> needs, and I am WAY behind most of you in the development cycle. The bladder SPD> design looks to be much lighter and more efficient, but looks to be more SPD> cumbersome to implement, so I'll stick to the piston for now. SPD> Sean Parting from a metallic tube of a certain precision and making provision for a removable bulkhead, so you can mount the piston or change a casket, could be a god solution. But how would you put a piston inside of a filament wound composite tank with integral bulkheads? A bladder must be made from a material that is elastic and resistant to the propellant used. There exist virtually no elastic materials that can be used with cryogenic propellants like LOX. So pistons and bladders can be useful means in certain cases but not as a general solution to the problem of handling propellants under changing accelerations. Hans Ulrich Ammann mailto:huammann@;aro.ch http://www.spl.ch _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
