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The Grudieaire GH-4 is an American autogyro that was designed for homebuilt construction.

GH-4
Role	Autogyro Type of aircraft
National origin	United States
Designer	Grudieaire

Design and development

The GH-4 is a single seat autogyro constructed of welded steel tubing with aircraft fabric covering. The GH-4 uses Timken roller bearings and spruce wood core rotor blades with composite covering.[1]

Variants

Grudieaire GH-4

Homebuilt

Vortech B20

Specifications (GH-4)

Data from Air Progress

General characteristics

• Crew: 1
• Length: 10 ft 2 in (3.10 m)
• Height: 7 ft 1 in (2.16 m)
• Empty weight: 240 lb (109 kg)
• Gross weight: 450 lb (204 kg)
• Fuel capacity: 5 U.S. gallons (19 L; 4.2 imp gal)
• Main rotor diameter: × 20 ft 4 in (6.20 m)

Performance

• Maximum speed: 65 kn (75 mph, 121 km/h)
• Cruise speed: 48 kn (55 mph, 89 km/h)
• Range: 61 nmi (70 mi, 110 km)
• Rate of climb: 1,650 ft/min (8.4 m/s)

See also

Aircraft of comparable role, configuration, and era

• Bannick Model T of the Air

References

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