I designed and test fired several KN-sorbitol, KN-dextrose propellant rocket
motors. However I haven’t vacuum degassed sugar propellant. I did used
pressure curing method to improve the density of the propellants. I don’t
think vacuum degassing sugar propellant is nessesary. Pressure curing is
enough. I’ve made tens of grains with 97 - 98% of the ideal propellant density
using pressure curing.
Check out Richard Nakka’s webpage on the
subject.(http://www.nakka-rocketry.net/sorb.html)
P.S.
There is E-mail list called “sugpro” which discusses KN-sugar propellants.
Mostly amateurs but, there are people that are making something like 12 inch
diameter motor with sugar propellants.
-----Original Message-----
From: "Dr Edward Jones"<RocketPioneer@xxxxxxxxx>
To: "arocket"<arocket@xxxxxxxxxxxxx>;
Cc:
Sent: 2021-01-10 (일) 14:58:48 (GMT+09:00)
Subject: [AR] Vacuum degassing KN-Sorbitol melts?
Has anyone first-hand experience with vacuum degassing hot batches of
KN-Sorbitol precasting? I've heard that's an advantageous process, but
have never found the need. Will degassing created a denser grain with
higher Isp? How much can effective degassing of KN-Sorbitol
formulations improve performance?