Groen Hawk 4
Groen Brothers Aviation · United States · first flew 1999 · light aircraft
The Groen Hawk 4 was a single-engine, pusher-configuration, four-seat autogyro built in the United States in the late 1990s. Three prototypes were flown, but it did not go into production.
Recognition (WEFT)
| W — Wings | Low-mounted, rotary |
|---|---|
| E — Engines | 1 × piston, fuselage-mounted |
| F — Fuselage | Pod fuselage with a mid-line pusher engine |
| T — Tail | Twin fin |
WEFT is AircraftIQ's four-point recognition method — how it works.
Spot it by:
- Pod fuselage with a mid-line pusher engine
- Low stub wings with the main wheels at the tips
- Twin booms and endplate fins with extra short inboard rudders
It has a semi-rigid rotor of 12.8 m diameter, a fixed tricycle undercarriage and a four-bladed propeller. The pilot sat with up to three passengers in two rows of seats.
Specifications
- The Groen Hawk 4 has a length of 6.71 m (22 ft).
- It has a wingspan of 12.8 m (42 ft).
- Its maximum speed is 225 km/h (140 mph).
- Typical crew: 4.
Figures are for the representative variant described above; marks differ. See how AircraftIQ sources figures.
History
Design work began in 1996, and the first prototype, the two-seat H2X, flew on 4 February 1997. The Hawk 4 first flew on 29 September 1999 with a 350 hp Continental TSIO-550 piston engine.
Variants
A second aircraft, initially the Hawk 4T, flew on 12 July 2000 with a 420 hp Rolls-Royce 250-B17C turboprop and was redesignated Hawk 4 when piston development was dropped. The Hawk 5 was a planned five-seat development.
Where you'll see it
In 2002 the second prototype was used for aerial security over Salt Lake International Airport during the Winter Olympic Games.
Related aircraft
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