08-11-2022, 07:11 PM
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Banned
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Join Date: Mar 2005
Location: Raleigh, NC Area
Posts: 1,743
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Quote:
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Originally Posted by blackshire
*Stamps hooves in enthusiastic assent* Wow--I never had an Enerjet kit; if Semroc offered "Retro-Repro" kits of some of them, I'd buy some (including as gifts for others)! Between Aerotech, Quest, and Estes, getting motors of the needed impulse ratings--and of the desired propellant types and specific propellant chemistries (flame & smoke characteristics)--would be no problem.
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ENERJET propellant ( aka "APP60" ) . . . small Orange flame . . . no smoke . . . strong Chlorine smell . . . Polyurethane resin bunder . . .
QUOTE :
"APP60 was 80% AP, 20% Flexane 60. Polyether polyurethanes like Flexane have some oxygen in the binder so it didn't take a very high propellant "solids loading" to produce a smokeless exhaust. HTPB propellants have a higher amount of carbon in the polymer so a higher solids loading is required to simulate the same effect...in the range of 84-86%."
END QUOTE :
https://forums.rocketshoppe.com/sho...25&postcount=13
Dave F. |