Rocket-Powered Personal Helicopter Emits Only Water

I thought this was pretty cool, a small personal helicopter utilizing rocket propulsion.
The Dragonfly uses 2 small hydrogen peroxide engines measuring 8 inches weighing 1.5 pounds each. Each engine is equivalent to 102 hp. It will top out at 100 knots and the exhaust is water. It can fly for 90 minutes,and it's fuel costs under 4$ per gallon, but uses 11 gallons per hour. The Dragonfly costs 120,000 dollars, so it ain't cheap.
After watching the vid, I am surprised at it's relative quietness compared to larger machines, and it is fairly agile and smooth.
www.wired.com...











Peace



[edit on 6-8-2010 by speculativeoptimist]

If you like a flat top haircut this is the tool for you !

Regards
Lee

Driving the rotors from jets at the tips eh? , reminds me of some good old 1950s british engineering. I give you... the Fairey Rotodyne.

en.wikipedia.org...:SFF_002-1055526_Fairey_Rotodyne.jpg

Of course that didnt use rockets..