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>The Hillson Bi-mono was a British experimental aircraft of the 1940s. It was designed to test the idea of "slip-wings", where the aircraft could take off as a biplane, jettison the upper, disposable wing, and continue flying as a monoplane. A single example was built, which successfully demonstrated jettisoning of the slip wing in flight.
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>The Bi-mono was subject to further testing by the Aeroplane and Armament Experimental Establishment at Boscombe Down from October 1941. The A&AEE found that the maximum speed of the biplane configuration was slower than the stalling speed of the monoplane configuration. Its landing characteristics were likened to a kangaroo.[10]
Is this the biggest-brained civil aircraft ever?
