Berliner-Joyce XF3J

The Berliner-Joyce XF3J was an American biplane fighter, built by Berliner-Joyce Aircraft. It was submitted to the United States Navy for their request for a single-seat carrier-based fighter powered by a 625 hp Wright R-1510-26 engine.

Development and design
The XF3J had elliptical fabric covered wings which gave it the appearance of a butterfly. The fuselage was semimonocoque metallic with an aluminum skin. The undercarriage was fixed, and would be the last biplane fighter without a retractable gear that the U.S. Navy would test. The aircraft performed satisfactorily in testing, but more promising aircraft had been developed and, in September 1935, the program was terminated.