Groen Hawk 4
Hawk 4 | |
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The turboprop powered second prototype. | |
Role | Four seat autogyro |
National origin | United States |
Manufacturer | Skyworks Global Inc
|
First flight | 4 February 1997 (H2X) |
Number built | 3 |
Variants | Groen ShadowHawk |
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.
Design and development
Design work on the Hawk utility/passenger autogyro began in 1996 and the first prototype, the two seat H2X, first flew on 4 February 1997. It was later modified to include a third seat and renamed the Hawk III. The production prototype, a four-seater named the Hawk 4, was significantly different from the Hawk III in detail but retained the pod and mid-line pusher engine configuration, combined with low stub wings, twin booms and
The Hawk 4 had a steel rotor mast and engine mountings but was mostly aluminium elsewhere, including the rotor, rotor head and
The Hawk 4 was powered by a 261 kW (350 hp)
Operational history
In 2002, the Winter Olympic Games contracted with GBA to provide aerial security over Salt Lake International Airport. The Hawk 4 second prototype bearing the acronym UOPSC (Utah Olympic Public Safety Command) was used for this assignment.[4]
Specifications (Hawk 4, piston engine)
Data from Jane's All the World's Aircraft 2000/1[2]
General characteristics
- Crew: 4
- Length: 22 ft 0 in (6.71 m) fuselage
- Height: 10 ft 0 in (3.05 m) to top or rotor head
- Empty weight: 1,841 lb (835 kg)
- Max takeoff weight: 2,800 lb (1,270 kg)
- Fuel capacity: 284 L (75 US gal; 62 Im gal)
- Powerplant: 1 × flat-sixpiston, 350 hp (261 kW)
- Main rotor diameter: 42 ft 0 in (12.80 m)
- Main rotor area: 1,385.4 sq ft (128.71 m2)
- Propellers: 4-bladed MTV, 6 ft 4 in (1.93 m) diameter constant speed
Performance
- Maximum speed: 140 mph (225 km/h, 121 kn)
- Cruise speed: 130 mph (209 km/h, 113 kn) at 75% power
- Never exceed speed: 150 mph (240 km/h, 130 kn)
- Range: 600 mi (965 km, 521 nmi) 75% power, maximum fuel
- Service ceiling: 15,994 ft (4,875 m)
- Rate of climb: 1,500 ft/min (7.6 m/s)
- Disk loading: 2.02 lb/sq ft (9.87 kg/m2) maximum
- Take-off to 15 m (50 ft): 46 m (150 ft)
- Landing from 15 m (50 ft): 46 m (150 ft)
References
- ISBN 0-7106-1898-0.
- ^ ISBN 0-7106-2011-X.
- ^ a b "Jane's - Groen 4". Archived from the original on 9 May 2012. Retrieved 25 December 2011.
{{cite web}}
: CS1 maint: bot: original URL status unknown (link) - ^ “Olympic Security Aided by Groen Brother’s Hawk”, Aero-News Network
External links
External videos | |
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Hawk 4 Gyroplane Takeoffs and Landings on YouTube |