BareRocketry
Member
I am using a 29mm G80-7T single use motor for my Aerotech Astrobee-D rocket, and having trouble getting the chutes to come out at all. Carl (all around good guy at www.apogeerockets.com) suggested that I test with 1 gram of BP. I took a spent G80-7T, taped the top hole and loaded the charge cup with 1 gram of FFFF black powder. Carl says that the 29mm G80 comes with a charge of 0.7 grams so a 1 gram charge (roughly 40% more) should be plenty.
Results were unexpected (video attached).
Dimensions of the rocket:
Inner diameter: 2.5"
Length of airframe pressurized during deployment: 14"
Shouldn't 1 gram of FFFF be more than enough?
Some portion of the expansion surely escaped out the nozzle during the test. But wouldn't the same thing happen during a normal launch?
I'm all ears.
Results were unexpected (video attached).
Dimensions of the rocket:
Inner diameter: 2.5"
Length of airframe pressurized during deployment: 14"
Shouldn't 1 gram of FFFF be more than enough?
Some portion of the expansion surely escaped out the nozzle during the test. But wouldn't the same thing happen during a normal launch?
I'm all ears.