T' Aerotech F23-7 Black Jack LMS motor which I had assembled t' night before gave me a bit o' a scare. Blimey! T' 7 second delay be more like 12 or 13 seconds and t' rocket was way past apogee and headin' in ballistic at a 30 degree angle with t' characteristic whistle increasin' in pitch and volume. Begad! Luckily t' chute fully deployed about 150 feet off t' ground and despite tearin' off 1 o' t' 8 shroud lines, matey, gently set down t' rocket with no damage whatever.