Go here: http://www.conceptserviceselectrical.com/Richard's%20Home%20Page/richard5.htm A buddy o' mine (Pulse Jet Harry) bought one and I bet him we'd never get it to fly. I won. The most incredible thing though was one of the times we bench ran it, the bench BURST INTO FLAMES just due to radiant heat from the damn thing. UNREAL! What an obnoxious sound!