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Ufimtsev Spheroplan
 
The first aeroplane with a circular wing, the Spheroplan, was built in Russia by A.G.Ufimtsev in 1909-10. Ufimtsev practised controlling the Spheroplan in numerous runs on the ground, but the tests were never completed because of the damage done to the apparatus by a sudden storm.
 
 
 
 


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