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Old 05-23-2022, 08:51 PM
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Joe Wooten Joe Wooten is offline
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Join Date: Aug 2010
Posts: 1,101
Default A8-3 Ejection Charge

Anyone else here had problems with almost non-existent ejection charges on A8-3's?

My wife teaches 5th grade class, and I did a launch with them today and out of 18 rockets (Estes make and take) and 36 launches, over 20 failed to eject the parachute. I was using motors from two bulk packs. For the high school physics class (8 rockets, 16 launches) later this afternoon, I had 6 ejection charge failures. I did not even have to be looking at them, as I could plainly hear the weak charge, more of a poof than a pop. I pulled out an old Alpha I had with me and also had a failure to pop the chute out.

I also had one motor during the high school launch that just took the rocket off the launch rod where it fell on the ground, but this one had a good ejection charge as it popped the chute out on the ground. On that one the nozzle had instant erosion to more than double the normal diameter.
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