T' first free flight o' Unreasonable Rocket's Blue Ball, a peroxide monopropellant vehicle. Ahoy! 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. Well, blow me down! unreasonablerocket.blogspot.com Filmed by Ben Brockert o' Masten Space Systems, masten-space.com