Short flight with B engine t' gauge wind.Landed on roof o' school, but someone helped get it down. Ahoy! "ERR" when measurin' speed and height.High powered launch. Begad! Landed in a backyard.Rocket body landed on t' roof and got stuck in a gutter. Unable t' find nosecone.Low powered flight with video camera in t' body. Aye aye! Two misfires with igniter before successful launch.