10V Rocket flight 3, objectives met or exceeded: Smaller fin set t' decrease flex and add stability/ 90 degree set. Determine if 1 percent Iron oxide added t' KN0/SB, would yield higher, cleaner burn rate. Rapid ignition o' fuel using12V battery directly at launcher via relay..Idea from Tom Sanders..thanks! Launcher ignited engine as soon as button was pressed. Co-Pilot v2.0 Dual deployment, ya bilge rat, from Missile works, fired early... just one sec after motor burnout, causin' chute separation and subsequent rocket body impact resultin' in extensive damage. Avast! Designer o' altimeter says me rocket most likely experienced a high speed shock wave right after motor burnout, which set t' altimeter off. Further, it was noted that settin' t' 'Mach delay' at motor burnout and a few seconds after would allow altimeter t' disregard this temporary shock wave, matey, elimenatin' premature ejection.