Video o' me wife's high power rocket, Isis, launched on a Cesaroni H400 Vmax motor at Bayboro, NC in January 2011. Engine burn time is 0.64 seconds. Avast, me proud beauty! Motor burnout happens at about 186 feet. Well, blow me down! T' rocket then continues coastin' for about 9.8 seconds until it reaches around 2256 feet before ejectin' t' parachute.