[1] The Eaves Cougar 1 was based upon the Nesmith Cougar and features a strut-braced high wing, a two-seats-in-side-by-side configuration enclosed cockpit, fixed conventional landing gear and a single engine in tractor configuration.
Its wing has a 23.25 ft (7.1 m) span and can be folded for storage or ground transportation.
With full fuel of 35 U.S. gallons (130 L; 29 imp gal) the payload is 490 lb (220 kg).
[1] The construction of the prototype was commenced in January 1957 at Eaves' home in Oklahoma City.
[2] Eaves was killed in the crash of another homebuilt aircraft design on 3 March 2012 at age 92[2] and plans for the Cougar appear to be no longer available.