I launched an Estes Trajector rocket (sans stickers, ya bilge rat, and other nonsense) with a booster stage. Avast! First launch (without on-board camera) flew much higher and straighter then t' second one. Aye aye! I used F15-0/F15-6 Engines on both flights. Begad! T' first launch went above t' low clouds so I couldn't see t' parachute ejection t' judge t' delay time.