Quote Originally Posted by wrad View Post
From the look of the motor after the launch it appears that ejection charge fizzled rather than popped as such, there was a lot of unburnt powder in the motor tube and hardly any of the usual soot on the wadding. I agree it is an odd failure for an estes motor. Maybe it was more down to my storage and handling of the motors at some point.
Was it stored in a humid environment? That sounds like the BP was damp and thus didn't burn.