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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.
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.
The Boeing X-50A Dragonfly, formerly known as the Canard Rotor/Wing Demonstrator, was a VTOL rotor wing experimental unmanned aerial vehicle that was developed by Boeing and DARPA to demonstrate the principle that a helicopter's rotor could be stopped in flight and act as a fixed wing, enabling it to transition between fixed-wing and rotary-wing flight.
Cabin width: 4 ft 10 in (1.47 m) Cabin length: 13 ft 5 in (4.09 m) Powerplant: 2 × Pratt & Whitney Canada PT6C-67A turboshaft engines, 1,447 kW (1,940 hp) each; Main rotor diameter: 2 × 7.9 m (25 ft 11 in) Main rotor area: 49 m 2 (530 sq ft) each - 3-bladed prop-rotors; Performance. Maximum speed: 509 km/h (316 mph, 275 kn) Cruise speed: 509 ...
The higher the loading, the more power needed to maintain rotor speed. [3] A low disk loading is a direct indicator of high lift thrust efficiency. [4] Increasing the weight of a helicopter increases disk loading. For a given weight, a helicopter with shorter rotors will have higher disk loading, and will require more engine power to hover.
Phantom 1 with a GoPro HERO3 camera. The Phantom 1, originally known as the Phantom, was released on January 7, 2013. [1] It uses 2.4 GHz for control and is powered by a 2000mAh battery, giving it a flight time of about 15 minutes. [2] [3] [4] It did not include a built-in camera, but it can be fitted with an optional mount for a GoPro HERO ...
Tokyo Metropolitan Police Department EH101 (AW101) The BERP rotor blade design was developed under the British Experimental Rotor Programme.The initial BERP rotor blades were developed in the late 1970s to mid-1980s as a joint venture programme between Westland Helicopters and the Royal Aircraft Establishment (RAE), with Professor Martin Lowson as a co-patentee. [1]
It later flew up to 1.52 m (4.99 ft) above the ground. The design was improved and the Gyroplane No.II appeared the following year. No.II had two two-blade rotors of 7.85 m (25.75 ft) diameter and also had fixed wings. Powered by a 41 kW (55 hp) Renault engine, it was reported to have flown successfully more than once in 1908.