Shrox Industria HyperSoarX
I built this model incorrectly: the vertical tail fins are 1.75 inches too far forward, so the rocket was unstable on its first flight. I have since added a boatload of nose weight (7 #4 split-shot lead sinkers) to improve the stability.

Sven Knudson
NAR#63297
sknudson@austin.rr.com