a "jet" pack uses jet engines for power - the fuel would be jet fuel but it needs air for combustion so i guess you could say it is powered by an air and fuel mixture - propulsion back packs have also been powered by rockets but using air only would probably not be be practical - to get enough lift would require a very large reservoir of highly compressed air - a turbine fan would require too much power to give enough lift - jets are definitly the way to go i would think there are several anime movies that have cities, vehicles, machines and even back packs powered by compressed air - unfortunatly its not practical even with current technology to build air reservoirs and lines, valves etc that can handle the extreme volume and preasure required for a small vehicle - it would make an awesome power source if it were possible - if a preasure vessel with those sort of preasures were to fail the resulting explosion would be as great as a very large bomb
Tiny models, Missles, Space probes, and Rocket-powered jet packs.
jet-lagged, jet-powered
The jet pack was from a members-only hot air balloon ride at the Festival of Flight in 2009. At the end of the ride, there were free jet packs.
A jet plane is any aircraft powered by jet engines.
Unfortunately, there are no jet packs in existence.
No
Music and jet-packs
there is no jetpacks.
Airplane is a device powered either by a piston engine and prop or by a jet engine.
Yes. The B-2 is a US Air Force bomber that is powered by jet engines and is a flying wing with a low radar cross section---i.e. a stealth bomber.
At the Festival of Flight party in April 2009, there was a hot air balloon ride for members only. At the top, there were free jet packs.
They are either powered by a turbine engine like a jet engine or a piston engine.