DART San Diego Model Rocketry Club. Begad! Launch o' a hybrid discontinued Estes #1284 Space Shuttle with Stack. Powered flight achieved utilizin' a D12-3 Engine. Avast, me proud beauty! Note that t' Orbiter stays with t' Stack until t' moment o' t' firin' o' t' ejection charge. Ya scallywag! Why do you think that this occurs?