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- Backpack_helicopter abstract "A backpack helicopter is a helicopter motor and rotor and controls assembly that can be strapped to a person's back, so that he can walk about on the ground wearing it, and can use it to fly. Its harness, like a parachute harness, should have a strap between the legs, so that the pilot does not fall out of the harness during flight. Some designs may use ducted fan design to increase upward thrust. Several inventors have tried to make backpack helicopters, with mixed results.Typically a backpack helicopter differs from a conventional helicopter in two ways.Firstly there is no tail rotor, and the main rotors are contra-rotating. Yaw is controlled by fine adjustment of a differential gear in the rotor drive transmission. When one rotor is adjusted to spin slightly faster than the other it induces yaw, or turning motion.Secondly, the rotors are fixed pitch, which assists with simplicity, however this means that in the event of engine failure autorotation is impossible. Usually a ballistic parachute would be incorporated for safety. An edition of Popular Science magazine in 1969 featured a backpack helicopter that used small jet engines in a tip jet configuration instead of contra-rotating rotors. This design could function in autorotation. Related are devices like a backpack helicopter which also include a seat and leg supports and are actually very small open-topped ordinary helicopters. In theory, a helicopter would be more efficient than a rocket-powered jetpack, possessing a greater specific impulse, and being more suited to hovering due to the smaller velocities of the propelled gases.".
- Backpack_helicopter thumbnail Pentecost_Backpack_Helicopter.JPG?width=300.
- Backpack_helicopter wikiPageID "3594326".
- Backpack_helicopter wikiPageRevisionID "606793539".
- Backpack_helicopter hasPhotoCollection Backpack_helicopter.
- Backpack_helicopter subject Category:Aircraft_configurations.
- Backpack_helicopter subject Category:Emerging_technologies.
- Backpack_helicopter subject Category:Helicopters.
- Backpack_helicopter subject Category:Ultralight_aircraft.
- Backpack_helicopter type Abstraction100002137.
- Backpack_helicopter type Act100030358.
- Backpack_helicopter type Activity100407535.
- Backpack_helicopter type AircraftConfigurations.
- Backpack_helicopter type Application100949134.
- Backpack_helicopter type Arrangement105726596.
- Backpack_helicopter type Cognition100023271.
- Backpack_helicopter type Configuration105731779.
- Backpack_helicopter type Design105728678.
- Backpack_helicopter type EmergingTechnologies.
- Backpack_helicopter type Event100029378.
- Backpack_helicopter type Occupation100582388.
- Backpack_helicopter type Profession100609953.
- Backpack_helicopter type PsychologicalFeature100023100.
- Backpack_helicopter type Structure105726345.
- Backpack_helicopter type Technology100949619.
- Backpack_helicopter type Use100947128.
- Backpack_helicopter type YagoPermanentlyLocatedEntity.
- Backpack_helicopter comment "A backpack helicopter is a helicopter motor and rotor and controls assembly that can be strapped to a person's back, so that he can walk about on the ground wearing it, and can use it to fly. Its harness, like a parachute harness, should have a strap between the legs, so that the pilot does not fall out of the harness during flight. Some designs may use ducted fan design to increase upward thrust.".
- Backpack_helicopter label "Backpack helicopter".
- Backpack_helicopter label "Mochila-helicóptero".
- Backpack_helicopter label "Ранец-вертолёт".
- Backpack_helicopter sameAs Mochila-helicóptero.
- Backpack_helicopter sameAs m.09np79.
- Backpack_helicopter sameAs Q282251.
- Backpack_helicopter sameAs Q282251.
- Backpack_helicopter sameAs Backpack_helicopter.
- Backpack_helicopter wasDerivedFrom Backpack_helicopter?oldid=606793539.
- Backpack_helicopter depiction Pentecost_Backpack_Helicopter.JPG.
- Backpack_helicopter isPrimaryTopicOf Backpack_helicopter.