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| J4B | |
|---|---|
 Barnett J4B G-BWCW autogyro at The Helicopter Museum, Weston-super-Mare, UK | |
| General information | |
| Type | Recreational autogyro |
| National origin | United States |
| Manufacturer | Homebuilt |
| Designer | Jerry Barnett |
The Barnett J4B is a small gyroplane marketed in the United States by Barnett Rotorcraft for homebuilding. Originally flown as the J-3M with an open cockpit and fabric-covered sides, later versions have a fiberglass cockpit pod either partially or fully enclosing the pilot. Apart from the basic J4B, versions available in 2007 included the BRC540 (two seats side-by-side) and J4B2 (two seats in tandem).
Variants
- J-3M
- Original variant with 48.5 kW (65.0 hp) Continental A65 engine.
- J-4M
- Improved J-3M with 63.5 kW (85.2 hp) Continental C85 engine.
- J4B
- Single-seat autogyro with 23 ft rotor.
- J4B-2
- Two-seat variant of the J4B with a 25ft 4in rotor.
Specifications (typical J4B)
General characteristics
- Crew: one pilot
- Length: 12 ft 4 in (3.76 m)
- Height: 7 ft 8 in (2.34 m)
- Empty weight: 530 lb (240 kg)
- Gross weight: 880 lb (400 kg)
- Powerplant: 1 × Continental O-200 , 100 hp (75 kW)
- Main rotor diameter: 23 ft 0 in (6.10 m)
- Main rotor area: 314 sq ft (29.2 m)
Performance
- Maximum speed: 125 mph (200 km/h, 109 kn)
References
Citations
Bibliography
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 121.
- Popular Rotorcraft Association (archived)