Sugar Propellant is Back!
Hot news: Check out the Sugar Rush flight with onboard video at the November NEFAR launch!
(Hint: It's the last one on that page.)
|Two 4-oz. packages of Pixy Stix used instead of sugar to make
a 650 gram batch of recrystallized KNO3/sucrose propellant using the electric skillet method.
Click Here for a full analysis of this test. Quick summary:
Motor Casing: Dr. Rocket 38-240
Propellant weight: 106.3g
Kn ratios: Initial and max, 284 Final, 228
Total thrust: 133Ns
Burn time: 0.48 second,
Delivered ISP: 128 seconds
This motor burned very well, performance is comparable with that from propellant made with plain KNO3/sucrose. It seems Pixy Stix is just an inefficient way to buy sugar. Larger tests will be attempted.
Click here for a short video of this test
(1.5 meg .wmv file, 5 seconds of video)
|54mm Loki 1600 motor casing used to launch the Sugar Rush to an estimated 5140 feet.
Altimeter failed to record properly, probably due to undersized vents in the new electronics bay.
Flown at monthly launch of the Northeast Florida Association of Rocketry (NEFAR) Clegg Sod Farm, Bunnell, FL. April 8th, 2006
|Click Here for a page describing this launch, including video.
Or Click Here for my main page, containing links to many such launches.
|Brand new motor, somewhat larger than the one used in the flight of 4-8-06. I always
like to static test a new motor a time or two before committing it to a
Loki 2000 casing, 54mm 5-grain. First test. Burning propellant made with SVRC KNO3, Pixy Stix, Karo Syrup and vinegar. 4 BATES grains and full-sized smoke grain. But smoke grain burned simultaneously with propellant, yielding high thrust but no after-smoke.
Propellant weight: 859g
Kn ratios: Initial 273, Max, 326 Final, 301
Peak Thrust: 368 Lbs-Force
Average Thrust: 264 Lbs-force
Total thrust: 1105Ns
Burn time: 0.93 second,
Delivered ISP: 131
High thrust is at penalty of extreme pressure (around 1800 psi) and short burn time. Case liner is split from one end to the other. No apparent damage to motor casing.
Click Here for a full analysis of this test.
|With a new 5-grain 54mm motor casing from Loki,
a new ARTS altimeter from Ozark,
and a whole bunch of straw candy from Publix,
the Sugar Rush is aiming for the mile marker in the sky!
Click Here for a description of this launch, including flight video.
Click Here for a larger image