Use the steam from Hydrogen Peroxide mono-propellant, for buoyancy AND have it leave the airship creating a rocket motor.

Idea I had at 17 (1981) for a submarine, but then read about the Kursk. Recently I saw the Seconds from Disaster episode, and realized H2O2 has been sacked for no good reason, just like airships after the Hindenburg explosion.
-- pashute, Jul 08 2013

Steam balloon
[xaviergisz, Jul 08 2013]

Coal powered water vapor balloon [pashute, Jul 08 2013]

Hot vapor balloon (LTA) [pashute, Jul 09 2013]

"Propulsion poofs; [pashute] posterized per physics. Pictures presently."
-- lurch, Jul 09 2013



random, halfbakery