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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.
The de Bothezat helicopter, also known as the Jerome-de Bothezat Flying Octopus, [1] was an experimental quadrotor helicopter built for the United States Army Air Service by George de Bothezat in the early 1920s, and was said at the time to be the first successful helicopter. Although its four massive six-bladed rotors allowed the craft to fly ...
The Curtiss-Wright VZ-7 (also known as the VZ-7AP [1]) was a VTOL quadrotor helicopter aircraft designed by the Curtiss-Wright company for the US Army. Like the Chrysler VZ-6 and the VZ-8 Airgeep it was to be a "flying jeep".
The Gyroplane No.I was one of the earliest attempts to create a practical rotary-wing aircraft. It was designed by the Bréguet brothers with help from Professor Charles Richet. The aircraft had an uncovered open steel framework with a seat for the pilot and a powerplant at the centre. Radiating from the central structure were four wire-braced ...
Pending approval, first flight of a full-scale prototype aircraft was slated for 2012. [9] The study was completed in May 2007, [12] with the Quad TiltRotor selected for further development. However, additional armor on Future Combat Systems manned ground vehicles caused their weight to increase from 20 tons to 27 tons, requiring a larger ...
The Gamera I is purpose-designed quadrotor helicopter to meet the criteria of the 1980 Sikorsky Prize. Two other teams have made prize attempts unsuccessfully, The Da Vinci III, built by a team at the California Polytechnic State University in 1989 and the Yuri I. [2] At the time the world record was of 19.46 seconds of flight at 0.2 m (7.9 in) altitude made by the Yuri I helicopter developed ...
The WGM.21 is an open cockpit quadrotor. Four rotors are mounted at the end of a four tubular supports arranged into a X shape. Cyclic and collective controls are mixed into a single control yoke. Pitch is controlled by foot pedals. A second model, the WGM.22, was developed with side-by-side configuration seating and an enclosed cockpit. [1]
George de Bothezat was born in 1882 in Saint Petersburg, [1] Russian Empire, to Alexander Botezat and Nadine Rabutowskaja. [3] [4] His father Alexander Il'ich Botezat belonged to a family of Bessarabian landlords, graduated from the department of history and philology of the Saint Petersburg University and worked in the Russian Ministry of Foreign Affairs, first in Saint Petersburg and then in ...