38mm carbon fibre mach madness rocket, matey, flown t' 18000ft on an Aerotech J570. Max velocity be 2970ft/sec, or 2025mph. Arrr! Blimey! Recovered undamaged 2km from t' launch site. Avast, me proud beauty! Blimey! Mach 1 was broken less than 100ft off t' pad, me hearties, max velocity reached 2.0 seconds after launch. Begad! Blimey! 112G's were pulled at liftoff.