Performance
Sugar based rocket propellants have an average Isp(specific impulse) of between 115 and 130 seconds. Compare that to the average Isp of an APCP (Ammonium perchlorate composite propellant), which is 150 to 180 seconds. Sorbitol and KNO3 based propellants with a typical 35:65 ratio are capable of a max thrust of up to 110 N, an Isp of between 110 and 125 seconds, and may have an average thrust of about 40 N. However, sorbitol and KNO3 rockets with additives have been recorded as having average thrusts of up to 100N, total impulses of up to 735 Ns, and specific impulses of up to 128 seconds.
Xylitol and KNO3 based rocket propellants are capable of a specific impulse of ~ 100 seconds and can have a total impulse of up to 230Ns. These have a unconfined burn rate of about 1.3 mm/sec. Overall, sugar rockets can compete fairly well
Dextrose and KNO3 based fuels are capable of an average thrust of ~80N, a total impulse of 144 Ns, and an Isp of 118 seconds.
Read more about this topic: Rocket Candy
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