Powered by an axial-flow turbojet engine, the Coléoptère had a ten.5-foot diameter ring-shaped “wing” that encircled the underside half of the airplane. SNECMA hoped to ultimately make it a RAM jet by compressing the incoming air, mixing it with gas, and lighting a fireplace that will ship it nicely past MACH speeds, Mustard notes.
Throughout take-offs and landings, thrust could be deflected utilizing vanes housed within the engine’s exhaust. 4 small fins strategically positioned across the “wing” would act as rudders to supply directional management whereas in flight. Retractable fins tucked contained in the nostril would deploy and assist tilt the airplane upright into “touchdown” mode.
An modern swiveling cockpit seat allowed the pilot to stay in a locked and upright place based mostly on the airplane’s alignment. Since these have been the times earlier than highly effective pc simulations, human take a look at pilots needed to strap in and provides these prototypes a go. It started real-world testing in April 1959, and severe issues sprung up nearly instantly. With out a stabilizing wing, the airplane spun whereas hovering within the vertical take-off stage. Sitting like astronauts on prime of a rocket, pilots had problem seeing the bottom. Lastly, with out wings, which theoretically would permit it to glide to security if the engines failed, the Coléoptère could be doomed in keeping with Mustard.
On July 25, 1959, SNECMA examined the airplane’s potential to transition from vertical take-off into horizontal flight mode. It tilted too far, and the pilot could not regain management. He ejected to security, however the Coléoptère was destroyed within the course of. Funding for a second prototype by no means materialized, and the mission was scrapped (by way of Mustard).