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The Bell Boeing Quad TiltRotor (QTR) is a proposed four-rotor derivative of the Bell Boeing V-22 Osprey developed jointly by Bell Helicopter and Boeing.The concept is a contender in the U.S. Army's Joint Heavy Lift program (a part of Future Vertical Lift program).
A quadcopter, also called quadrocopter, or quadrotor [1] is a type of helicopter or multicopter that has four rotors. [ 2 ] Although quadrotor helicopters and convertiplanes have long been flown experimentally, the configuration remained a curiosity until the arrival of the modern unmanned aerial vehicle or drone.
Sri Lanka. Sri Lanka Army introduced the Phantom 4 in 2016, with two in service with the 15th Unmanned Aerial Vehicle Regiment for training as of 2019. [106] Uruguay. National Army introduced the Phantom in 2017, with 22 in service as of 2019 for emergency response operations. [106]
Rotor head and transmission of a Bell 412. Data from International Directory of Civil Aircraft, [75] Bell 412EP Product Specifications [76] General characteristics. Crew: one-two pilots; Capacity: up to 13 passengers, maximum external load of almost 6,614 lb (3,000 kg) [5] Length: 56 ft 1 in (17.09 m) including rotors; Fuselage length: 43 ft (13 m)
The H502S, also marketed as the "H502S X4 DESIRE FPV" is a smaller version of the H501S quadcopter and same size as the H502E. Uses brushed motors, has 12 minutes' flight time, 7.4 V (2S) 610 mAh Li-Po battery, GPS Positioning, first-person view (FPV), altitude hold, follow-me mode, 720P High Definition Camera and return to home.
Bell-Boeing V-22 Osprey, the only crewed tiltrotor in production to date. A tiltrotor is a type of vertical takeoff and landing (VTOL) aircraft that convert from vertical to horizontal flight by rotating propellers or ducted fans from horizontal positions like conventional aircraft propellers to vertical like a helicopter's rotors.
Cierva Air Horse - a British three-rotor "heavy lift" helicopter first flying in 1948. Three rotors were used to give a large lift without compromising rotor strength. [16] Volocopter designs - a series of German prototype electric multicopters with 18 rotors, the first electric multicopter in the world to achieve crewed flight.
It has a two-bladed semi-rigid rotor and a conventional two-blade tail rotor. The first Mini-500 flew in 1992 and the company delivered the first production factory-assembled helicopter in July 1994. Production of kits ceased in 1999 and the company claimed that more than 500 had been sold. [1] [2]
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