D15-7T three pack
1992 AeroTech, Inc. All rights reserved
Rear closure blown out, presumably from over pressurization. Casing threads are now missing/rolled over. Never found the nozzle end closure.
Only found half of the grain as it split along the slot line, and the delay grain and ejection powder never lit. The copperhead igniter most have plugged the nozzle upon ignition. It was a pretty big bang, pushing the rocket about 10 feet into the air. The half of the grain that lit started a grass fire right under the launch pads.