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The design featured two engines driving four rotors through a system of v belts. No tail rotor was needed and control was obtained by varying the thrust between rotors. [14] Flown many times from 1956, this helicopter proved the quadrotor design and it was also the first four-rotor helicopter to demonstrate successful forward flight.
The conceptual design featured a large tandem wing aircraft with V-22 type engines and 50-foot (15 m) rotors at each of the four wing tips. The C-130-size fuselage would have a 747-inch (19.0 m) cargo bay with a rear loading ramp that could carry 110 paratroopers or 150 standard-seating passengers.
American Helicopter [10] Aviodyne U.S.A. Bell/Agusta Aerospace Company; Bell Helicopter [44] Bendix Helicopter Company (defunct) [10] Bensen Aircraft Company (defunct) [10] Boeing Rotorcraft Systems (formerly Boeing Helicopters & Boeing-Vertol) [45] Brantly International [20] – all manufacturing is done in Qingdao, China [46] Campbell ...
Gyro 200 ED mini-UAV Quadcopter of the Gyrofly Innovations. [46] [47] Gyro 500 Mini-UAV Quadcopter of the Gyrofly Innovations. [48] Harpia This is a medium size tactical UAV of the Harpia Systems (Joint-Venture of the Embraer Defense and Security, AEL Systems and Avibras), [49] [50] halted in January 2016 [51] Hornet H2 UAV of the BRVANT. [40]
Two-seat variant powered by a 115 hp (86 kW) Rotax 914, 115 hp (86 kW) Subaru EA-81 automotive conversion, or similar engine. Four flying by 1998. [2] [3] Rotor Flight Dynamics Dominator UltraWhite A lightweight version of the Dominator without any fairing and powered by a 50 hp (37 kW) Rotax 503 two-stroke. [4] Rotor Flight Dynamics Dominator ...
This engine, the first built by RotorWay, was a 4-cylinder, 4-cycle, 133 horsepower (99 kW) engine. In 1977, because of the increased engine power, the length of the Scorpion's blades increased, from 24 feet (7.3 m) to 25 feet (7.6 m). Gross Weight: 1,235 lb (560 kg) Useful Load: 420 lb (191 kg)
Although both the 230 and 430 are powered by Rolls-Royce (Allison) 250 turboshaft engines, the 430's engines are 10% more powerful. Other changes include the 1 ft 6 in (46 cm) stretched fuselage, providing for two extra seats, an optional EFIS flight deck, and a choice of either skids or retractable wheeled undercarriage.
The engines drive a fully articulated four-blade rotor system. [16] Over time, more advanced rotor blade designs have been progressively adopted for the AW109's main and tail rotors, such as composite materials being used to replace bonded metal, [ 17 ] these improvements have typically been made with the aim of reducing operating costs and ...