The Barnett J4B is a small

gyroplane An autogyro (from Greek and , "self-turning"), also known as a ''gyroplane'', is a type of rotorcraft that uses an unpowered rotor in free autorotation to develop lift. Forward thrust is provided independently, by an engine-driven propeller. Whi ...

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

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