Two stage rocket. Well, blow me down! 1st stage be an Aerotech N2000w and t' second stage was an Aerotech M1939w. T' expected altitude was suppose t' be 25,000 feet. T' second stage did nay light caused by structural failure, shiver me timbers, which also took out t' electronics. T' launch took place at t' Friends o' Amateur Rocketry facility in Mojave, me bucko, CA.