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The Robinson R44 is a four-seat light helicopter produced by Robinson Helicopter Company since 1992. Derived from the company's two-seat Robinson R22, the R44 features hydraulically assisted flight controls and a larger engine. It was first flown on 31 March 1990 and received FAA certification in December 1992, with the first delivery in February 1993.
The Kazan Ansat is a Russian light, multipurpose helicopter manufactured by Kazan Helicopters.
A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of short take-off and landing (STOL) or short take-off and vertical landing (STOVL) aircraft cannot perform without a runway.
The Cierva C.6 was the sixth autogyro designed by engineer Juan de la Cierva, and the first one to travel a "major" distance. Cierva, the engineer responsible for the invention of the autogyro, had spent all his funds on the research and creation of his first five prototypes. Therefore, in 1923, he turned to the Cuatro Vientos Aerodynamics Laboratory chief, Commander Emilio Herrera, who succeeded in persuading General Francisco Echagüe, the director of the Military Aviation Aeronautics Department, to take over the second stage in the research and development of Cierva's autogyros.
The Pitcairn OP-1 was the first rotary-wing aircraft to be seriously evaluated by any of the world's major air forces. The aircraft was a relatively new type, an autogyro. Pitcairn's model was never put into production for any military.
The Fairey FB-1 Gyrodyne is an experimental British rotorcraft that used single lifting rotor and a tractor propeller mounted on the tip of the starboard stub wing to provide both propulsion and anti-torque reaction.
The Breguet-Richet Gyroplane was an early French experimental quadcopter rotary-wing aircraft developed by Breguet Aviation.
The Cierva C.19 was a 1930s British two-seat autogyro, designed by Spanish engineer Juan de la Cierva. It was built by Avro as the Avro Type 620. It proved to be the most successful and widely produced of the early de la Cierva designs.
The Mil Mi-60 MAI was a joint project between Mil and the Moscow Aviation Institute to develop a light utility helicopter. A mockup was displayed at the MAKS 2001 air show, where Russian aerospace journal Aviatsiya i Kosmonavtika described it as a "little brother" to the Mil Mi-34.
The Aviaimpex KT-112 Yanhol is a light, three-seat helicopter produced by Aviaimpex in Ukraine. It was first presented to the media on August 31, 2001.
The Kellett XR-8 was a helicopter built in the United States during World War II. It was a two-seat machine intended to demonstrate the feasibility of a twin-rotor system and, while it accomplished this, it also demonstrated a number of problems that prevented further development of this particular design.
The Pitcairn PA-34 and Pitcairn PA-33, given the United States Navy (USN) designation Pitcairn OP-2 and United States Army designation Pitcairn YG-2 respectively were reconnaissance autogyros designed and built in 1936 for evaluation.
The Lockheed CL-475 is a two-seat, single-engine light helicopter developed by Lockheed to explore rigid rotor technology. The CL-475 has a three-bladed main rotor and a two-bladed tail rotor. Only one was built.
The de Bothezat helicopter, also known as the Jerome-de Bothezat Flying Octopus, 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 successfully, it suffered from complexity, control difficulties, and high pilot workload, and was reportedly only capable of forward flight in a favorable wind. The Army canceled the program in 1924, and the aircraft was scrapped.
The Curtiss-Bleecker Helicopter was an American prototype rotary wing aircraft, introduced in 1926. The thrust of the aircraft was distributed from a central mounted engine through shafts to propellers mounted on each rotor blade.
The Aero-Astra Okhotnik is a Russian single engine, three seat autogyro of pusher, pod and boom configuration. It has been developed into several variants from 2001 to 2007.
The PZL SM-4 Łątka was a prototype three-seat helicopter of the 1960s, developed by WSK PZL-Świdnik in Poland. Of largely conventional design and construction, a single prototype was built, but was not flown as a result of engine problems.
The Sikorsky S-50 was a smaller lighter version of the Sikorsky R-6 designed for the United States Army Air Corps as an observation helicopter with dual controls in 1943. The design emphasized minimal weight and was to be powered by a 150 hp (112 kW) Franklin 6ACV-298 engine turning a three blade main rotor constructed of metal and plywood covered by 2 layers of fabric. The tail rotor also had three blades made from laminated wood. Further weight savings of the design included the rejection of a conventional oleo strut tail wheel in favor of a tail skid on a pivot cushioned by three rubber doughnuts. One full scale wooden mock-up was built but no flying examples were ever produced.
The Cierva C.7 was an experimental autogiro designed by Juan de la Cierva and built in the late 1920s.
Rotorfly R-30 - Russian tandem-seat coaxial helicopter manufactured by Rotorfly LLC, city of Kumertau Rotor Fly LLC..
