I recieved this message back from ATL. I must also note that I only looked into using bladder systems for H2O2/Hydrocarbon applications. I never plan on using cryogenic propellants. (goes against the fun of using peroxide) :)
Sean (see message below) Mr. Daly: We build H2O2 bladders from EPDM and fluoropolymer materials. Normally header bladders are installed in a cavity which serves as a restraint. However, if the bladder is to be directly pressure stressed, then we need to compute the forces, resultant from your bladder size and geometry. We have built certain bladders to handle 10,000 psi, it depends mostly on configuration and stroke. If you can provide this information, we will do the calculations for you. Regards, Peter Regna For ATL > 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 _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
