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Model Forum / General / Rockets / September 2004O2
I read alot about nitrous oxide as the oxidizer in a hybrid but what about plain oxygen (not LOX)? > I read alot about nitrous oxide as the oxidizer in a hybrid but what > about plain oxygen (not LOX)? N2O is easier/safer to handle than pure oxygen. Also you need a delivery system. N2O is self pressurizing. You can load it in liquid state at around 700PSI. As it warms up it converts to gas and the tank pressure increases forcing the gaseous N2O into the combustion chamber. If you load your oxygen as a gas, you would either have to load at extreme pressure or have some other way to force it into the combustion chamber. And if you use LOX you need pumps. >> I read alot about nitrous oxide as the oxidizer in a hybrid but what >> about plain oxygen (not LOX)? [quoted text clipped - 7 lines] >force it into the combustion chamber. And if you use LOX you need >pumps. I have not flown a hybrid motor, but I think liquid N2O is actually delivered to the combustion chamber and vaporized at the injector. LOX can be pressure fed, without pumps, although you will need a pressurization system probably using nitrogen or helium. The only problem with N2O is that you have to get it very hot before it "works", so motor ignition is more difficult. Alan It may be liquid at the injector, but I think if vaporizes instantly. And N2O is self-pressurizing. Getting it hot enough to oxidize is not a problem in practice. I personally like the non-pyro method where you fill the combustion chamber with GOX and then light a strip of steel wool electronically. The pyrotechnic method, using a chunk of APCP, works nicely too. WestCoast uses BP with an wetting agent to do the same. >>> I read alot about nitrous oxide as the oxidizer in a hybrid but what >>> about plain oxygen (not LOX)? [quoted text clipped - 17 lines] > > Alan > It may be liquid at the injector, but I think if vaporizes instantly. > And N2O is self-pressurizing. [quoted text clipped - 25 lines] >> >> Alan Where can i find plans on the injector portion of the motor, this seems to be the tricky part > I read alot about nitrous oxide as the oxidizer in a hybrid but what > about plain oxygen (not LOX)? Not nearly dense enough.  SignatureJerry Irvine, Box 1242, Claremont, California 91711 USA Opinion, the whole thing. <mail to:01rocket@gte.net> Please bring common sense back to rocketry administration. Produce then publish. http://www.usrockets.com My articles valuable? Donate http://tinyurl.com/2hmgv |
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