The Hillson Bi-Mono was used in 1941 as an experimental aircraft to test whether it was possible to jettison a wing during flight. The extra wing would provide more lift during takeoff, so that additional cargo or fuel could be carried. The wing would be jettisoned when the aircraft was airborne. The idea was to be used on the Hawker Hurricane, but during testing, the tiny Hillson Bi-Mono was used.
Wingspan: 20 ft (6.1 m)
Length: 14’6″ (4.4 m)
Engine: 205 BHP
At a scale of 1:5, this model will have a wingspan of only 1.22 m – nearly as small as the deHavilland TK4.