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