Ellingston Special

The Ellingston Special was a variable-geometry aircraft, designed by Cornwallis "Con" Ellingston of Great Falls, Montana in the late 1930s.

Background
Ellingston, together with Earle Hansen, constructed the aircraft, with Hansen making the maiden flight on April 23, 1938. It was a single-seat low-wing monoplane, fitted with a retractable undercarriage, and was powered by a 70 hp LeBlond 90-7D radial engine, fitted with a two-bladed tractor propeller. The primary structure was constructed from 4130 chromoly steel tubing.

The aircraft's most notable feature was its telescopic wings, which could vary in span between 25 ft and 32 ft, with it being possible to vary the wingspan while in flight. The maximum speed of the aircraft varied from 165 mph with the wings retracted, to 110 mph with the wings extended.

An article in the December 1939 issue of Popular Aviation magazine stated that Ellingston was working on a twin-engined transport aircraft, which would also incorporate variable span, construction of which was scheduled to begin that Winter.