An autogyro, or gyroplane, is a class of rotorcraft that uses an unpowered rotor in free autorotation to develop lift. While similar to a helicopter rotor in appearance, the autogyro's unpowered rotor disc must have air flowing upward across it to make it rotate.
The CarterCopter is an experimental compound autogyro developed by Carter Aviation Technologies in the United States to demonstrate slowed rotor technology. On 17 June 2005, the CarterCopter became the first rotorcraft to achieve mu-1 (μ=1), an equal ratio of airspeed to rotor tip speed, but crashed on the next flight and has been inoperable since. It is being replaced by the Carter Personal Air Vehicle.
The Fairey Rotodyne was a 1950s British compound gyroplane designed and built by Fairey Aviation and intended for commercial and military uses. A development of the earlier Fairey Jet Gyrodyne, which had established a world helicopter speed record, the Rotodyne featured a tip-jet-powered rotor that burned a mixture of fuel and compressed air bled from two wing-mounted Napier Eland turboprops. The rotor was driven for vertical takeoffs, landings and hovering, as well as low-speed translational flight, but autorotated during cruise flight with all engine power applied to two propellers.
A gyrodyne is a type of VTOL aircraft with a helicopter rotor-like system that is driven by its engine for takeoff and landing only, and includes one or more conventional propeller or jet engines to provide thrust during cruising flight. During forward flight the rotor is unpowered and free-spinning, like an autogyro, and lift is provided by a combination of the rotor and conventional wings. The gyrodyne is one of a number of similar concepts which attempt to combine helicopter-like low-speed performance with conventional fixed-wing high-speeds, including tiltrotors and tiltwings.
A rotary-wing aircraft, rotorwing aircraft or rotorcraft is a heavier-than-air aircraft with rotary wings that spin around a vertical mast to generate lift. The assembly of several rotor blades mounted on a single mast is referred to as a rotor. The International Civil Aviation Organization (ICAO) defines a rotorcraft as "supported in flight by the reactions of the air on one or more rotors".
The Fairey Jet Gyrodyne is a British experimental compound gyroplane built by the Fairey Aviation Company that incorporated helicopter, gyrodyne and autogyro characteristics. The Jet Gyrodyne was the subject of a Ministry of Supply (MoS) research contract to gather data for the follow-up design, the Rotodyne.
The Air & Space 18A is a gyroplane that was manufactured in the central United States between 1965 and 2000.
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 Flettner Fl 185 was an experimental German gyrodyne developed by Anton Flettner, a machine which could fly both as a helicopter and as a gyroplane.
The Avian 2/180 Gyroplane was a two-seat, single-engine autogyro built in Canada in the 1960s. Several prototypes were built but series production was never achieved.
The AAI SparrowHawk is an American two-seat pusher ultralight autogyro, available in kit form for amateur construction.
The Hafner A.R.III Gyroplane was a British 1930s experimental autogyro designed by Austrian Raoul Hafner, and built by the A.R.III Construction Company at Denham, Buckinghamshire.
The GBA-DARPA Heliplane was a proof-of-concept, long-range, VTOL aircraft intended to cruise at twice the speed of conventional helicopters. It was funded by the Defense Advanced Research Projects Agency (DARPA) and designed by Groen Brothers Aviation (GBA), which has since been re-branded as Skyworks Global.
The Groen Hawk 4 was a single engine, pusher configuration, four seat autogyro built in the United States in the late 1990s. Three prototypes, two piston engined and one turboprop powered, were flown but the Hawk did not go into production.
Gyro-Kopp-Ters is an American aircraft manufacturer based in Lake City, Florida and founded by brothers Bob and Arden Kopp. The company specializes in the design and manufacture of autogyros in the form of kits for amateur construction.
The Calumet Snobird Explorer was an American autogyro designed and produced by Calumet Motorsports of Lansing, Illinois, introduced in May 1997. Now out of production, when it was available, the aircraft was supplied as a kit for amateur construction.
The Kayaba Heliplane Type-1 was a gyrodyne designed by Shiro Kayaba and prototyped by Kayaba Industry in Japan during the early 1950s.
The Groen ShadowHawk was a proposed American autogyro that was under development in the mid-2010s by Groen Aeronautics of Midvale, Utah for the surveillance role. The aircraft was intended to be supplied complete and ready-to-fly.
ARC Aerosystems is a British consortium that intends to produce modern CAA-certified VTOL autogyros for commercial use. They have a prototype under test, the Pegasus VTOL-Tech, which is to go into production, with delivery expected in 2026. ARC have plans for two other larger gyroplanes, the Linx P3 3-seater, and the Linx P9, a large winged gyroplane.
