The C.450 Coleoptere was a VTOL research aeroplane, designed by von Zborowski,,that rose vertically on the power of its SNECMA Atar 101 turbojet before translating into forward flight supported by its annular wing.
The C.450 Coleoptere was derived from the Atar Volant test vehicle, and combined the concept of tail-sitting vertical take-off and an annular wing. Powered by an 8157-lb (3700-kg) thrust SNECMA Atar 101EX, the Coleoptere first flew in May 1959 and completed a limited test programme before the aeroplane was lost in an accident.
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