Replies to post #293 on lunar mining

[backtrax]

I've never made anything quite like what the "Big-Boys" fly, but some of the solids I've flown had inexplicable catastropic-failures. (Inexplicable at the time) Later I'd found the stored motors were developing cracks in the fuel-grain, leading to severe over-pressures shortly after ignition.
15 to 20 ft flight, then kaboom.