Short flight with B engine t' gauge wind.Landed on roof o' school, me bucko, but someone helped get it down. "ERR" when measurin' speed and height.High powered launch. 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. Avast, me proud beauty! Two misfires with igniter before successful launch.