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AP combustion gas constant/temperature

Can anyone provide me with the:

combustion gas constant
and
combustion gas temperature
for AP (ammonium perchlorate) based propellant (not black powder).
Thanks.
Steve
Reply to
Steve
Loading thread data ...
Steve,
That depends on your ratios of AP, AL, Binder and curative. There is a program called GUIPEP/PROPEP that can help you out. It is shareware. I don't have the link handy, but a search will turn it up.
Mike Fisher Binder Design
formatting link
Reply to
Mfreptiles
Thanks Mike - PROPEP seems to provide exactly what I want.
The next question would be what do Aerotech/Cesaroni etc. use for ratios? I just need an approximate idea. GDL PROPEP seems to default to this (by weight):
Ammonium Perchlorate 69% Aluminium 16% Iron Oxide 1% R45M (Binder?) 14%
Would that be reasonable approximation for Aerotech and Cesaroni motors?
Steve
Reply to
Steve
Not even close. It would be foolish for me to try to guess. Aerotech uses a widely different formula(s) than Cesaroni. Nobody uses that much aluminum in small motors, although White Lightning does use a large amount of magnesium. No way that they are processing at 86% solids, probably closer to 80% with the addition of DOA to thin the mix.
Mike Fisher
Reply to
Mfreptiles

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