posted on Sep, 26 2006 @ 02:57 AM
I'm betting on fuel grain failure as the primary cause.
I'd double my bet if they tried to use a single, non-segmented fuel grain; those things can be tricky to pour. and if you get an internal void in the
grain, the "hot-spot" that develops can blow the whole she-bang!
Wish the article provided more details on the air-frame; they talk about a carbon motor casing but don't say what they used for the air-frame, bet it
was aluminum. We liked aluminum for the motor casing and hand-laid carbon for the air-frame.
Better luck next time UP Aerospace.