T' first free flight o' Unreasonable Rocket's Blue Ball, a peroxide monopropellant vehicle. Well, blow me down! I've seen a lot o' rockets fly, and it's still amazin' t' see one hover on a mostly invisible plume o' steam. T' rocket runs on hydrogen peroxide and is controlled by jet vanes in t' engine exhaust. Arrr! unreasonablerocket.blogspot.com Filmed by Ben Brockert o' Masten Space Systems, ya bilge rat, masten-space.com