The Gyro-Kopp-Ters Twin Eagle is an American autogyro, designed by Bob and Arden Kopp and produced by their company, Gyro-Kopp-Ters of

Lake City, Florida Lake City is a city in northern Florida. It is the county seat of Columbia County, Florida, United States. As of the 2020 census, the city's population was 12,329. It is the principal city of the Lake City Micropolitan Statistical Area, which ...

. The aircraft is supplied as a kit for amateur construction or as a complete ready-to-fly-aircraft.Bayerl, Robby; Martin Berkemeier; et al: ''World Directory of Leisure Aviation 2011-12'', page 182. WDLA UK, Lancaster UK, 2011. ISSN 1368-485XTacke, Willi; Marino Boric; et al: ''World Directory of Light Aviation 2015-16'', page 195. Flying Pages Europe SARL, 2015.

Design and development

The Twin Eagle features a single main rotor, a two-seats-in tandem open cockpit with a windshield,

tricycle landing gear Tricycle gear is a type of aircraft undercarriage, or ''landing gear'', arranged in a tricycle fashion. The tricycle arrangement has a single nose wheel in the front, and two or more main wheels slightly aft of the center of gravity. Tricycle g ...

with wheel pants and a four-cylinder, air-cooled,

four-stroke A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...

, Subaru EJ-22 automotive conversion engine in

pusher configuration In an aircraft with a pusher configuration (as opposed to a tractor configuration), the propeller(s) are mounted behind their respective engine(s). Since a pusher propeller is mounted behind the engine, the drive shaft is in compression in nor ...

. The aircraft mounts a diameter Dragon Wings main rotor made by

Rotor Flight Dynamics Rotor Flight Dynamics Inc was an American aircraft manufacturer based in Wimauma, Florida and owned by Ernie Boyette. The company was founded in 1986 and specialized in the design and manufacture of autogyros in the form of plans and kits for ...

, with a chord of . Standard equipment fitted includes a hydraulic pre-rotator and dual controls. The propeller used is a four bladed

Powerfin Powerfin Propellers, is an American manufacturer of composite propellers for homebuilt, light-sport and ultralight aircraft, as well as wind power generation systems. The company headquarters is located in Hurricane, Utah, although it was form ...

composite, ground adjustable type with a diameter. The aircraft has an empty weight of and a gross weight of , giving a useful load of . The company estimates the assembly time from the supplied kit as 120 hours.

Operational history

By November 2017 two examples had been registered in the United States with the

Federal Aviation Administration The Federal Aviation Administration (FAA) is the largest transportation agency of the U.S. government and regulates all aspects of civil aviation in the country as well as over surrounding international waters. Its powers include air traffic m ...

Specifications (Twin Eagle)

References

External links

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Official photos
{{Gyro-Kopp-Ters aircraft 2000s United States sport aircraft Homebuilt aircraft Single-engined pusher autogyros