The Barnett J4B is a small

gyroplane An autogyro (from Greek and , "self-turning"), gyroscope, gyrocopter or gyroplane, is a class of rotorcraft that uses an unpowered rotor in free autorotation to develop lift. A gyroplane "means a rotorcraft whose rotors are not engine-dr ...

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

Continental A65 The Continental O-170 engine is the collective military designation for a family of small aircraft engines, known under the company designation of A50, A65, A75 and A80. The line was designed and built by Teledyne Continental Motors, Continental ...

engine.Taylor 1981, p. 121. ;J-4M :Improved J-3M with

Continental C85 The Continental O-190 (Company designations C75 and C85) is a series of engines made by Continental Motors beginning in the 1940s. Of flat-four configuration, the engines produced 75 hp (56 kW) or 85 hp (63 kW) respectively ...

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)

References

Citations

Bibliography

* {{cite book , last= Taylor , first= Michael J. H. , title=Jane's Encyclopedia of Aviation , year=1989 , publisher=Studio Editions , location=London , pages=121
Popular Rotorcraft Association
(archived)

External links

Barnett Rotorcraft company website
1970s United States sport aircraft Single-engined pusher autogyros