SNECMA C-450. The SNECMA Coleoptere is the ultimate development of the C.400 P.1 and P.2 Atar Volant and P.3 VTOL research vehicles. The engine, an Atar 101 turbojet, was developed by the SNECMA company and the airframe constructed by Nord Aviation. This version of the Coleoptere is subsonic but future versions should be capable of supersonic speeds. No details of dimensions, speed and weights have been released. It is expected that by the time these lines are read the aircraft will have made its first flight.