- Joined
- Jan 27, 2009
- Messages
- 4,499
- Reaction score
- 2,978
I flew my upscale orbital transport glider today, all motors from batch 05161910
I've had trouble in the last 10 years in maybe 30 flights with four other anomolies, in all four cases the propellent burned 3x faster than normal, in one case the model survived as did the casing, in three other cases the case split like a banana peel and destroyed the model. George Gassaway and I believe it is a propellent void causing an overpressure, I was very careful to fully grease the forward end of the propellent and liner so don't think it was burning on both ends. In this one case I did not find the closure but did recover the 0 ring and the split open casing. I personally won't fly G-12's any more I have lost 3 models in maybe 30 flights unfortunately, they have discontinued the casing but still make the reloads, but I will just go for the new H-13 29mm longburn motors from now on....I did get three flights on video as well as the explosion...
Here are three other threads where I've had similar issues
https://www.rocketryforum.com/threads/two-motor-failures-yesterday.49350/#post-482119
https://www.rocketryforum.com/threads/problem-with-g-12-batch-05021702.149855/
https://www.rocketryforum.com/threads/big-yf-12-rc-rocket-glider-for-g-12-motors.157793/post-2055838
and one of my SR-71 flights with fast burn:
and one of the Bomarc where the same thing happened...
I've had trouble in the last 10 years in maybe 30 flights with four other anomolies, in all four cases the propellent burned 3x faster than normal, in one case the model survived as did the casing, in three other cases the case split like a banana peel and destroyed the model. George Gassaway and I believe it is a propellent void causing an overpressure, I was very careful to fully grease the forward end of the propellent and liner so don't think it was burning on both ends. In this one case I did not find the closure but did recover the 0 ring and the split open casing. I personally won't fly G-12's any more I have lost 3 models in maybe 30 flights unfortunately, they have discontinued the casing but still make the reloads, but I will just go for the new H-13 29mm longburn motors from now on....I did get three flights on video as well as the explosion...
Here are three other threads where I've had similar issues
https://www.rocketryforum.com/threads/two-motor-failures-yesterday.49350/#post-482119
https://www.rocketryforum.com/threads/problem-with-g-12-batch-05021702.149855/
https://www.rocketryforum.com/threads/big-yf-12-rc-rocket-glider-for-g-12-motors.157793/post-2055838
and one of my SR-71 flights with fast burn:
and one of the Bomarc where the same thing happened...
Last edited: