On 6 May 1959, a French test pilot named Auguste Morel lit an Atar 101 E.V. turbojet at Melun-Villaroche airfield and lifted a machine that looked like a lipstick tube standing on a doughnut. The SNECMA C.450 Coléoptère ("beetle") was a tail-sitting VTOL with an annular wing — a complete cylindrical ring, 3.2 meters in diameter, wrapped around the aft fuselage. No conventional wing, no separate horizontal stabilizer. The ring itself provided lift in horizontal flight, acted as a shroud around the exhaust in hover, and gave the pilot four small castoring wheels to land on.

The idea traced back to Austrian aerodynamicist Helmut von Zborowski, who had joined SNECMA after the war and patented the annular-wing concept in the early 1950s. Von Zborowski's math said a ring wing would give better lift-to-drag than a conventional planform at supersonic speeds, generate no wingtip vortices, and — critically — let a tail-sitting fighter transition to horizontal flight by simply pitching over 90 degrees. No tilting engines, no rotating wings, no ducted fans. Just one jet and one ring.

SNECMA built the C.450-01 around a modified Atar turbojet producing about 3,700 kgf of thrust — enough to lift the 3-ton airframe with margin. The pilot sat in a tilting seat that rotated so he wasn't lying on his back during hover. Control in the vertical regime came from four swiveling exhaust vanes in the jet efflux, with puffer jets bled from the compressor for roll. In eight flights between May and July 1959, Morel got the Coléoptère to hover at 800 meters, translate horizontally at low speed, and demonstrate stable vertical landings. The French air ministry was cautiously optimistic; a supersonic follow-on, the C.470, was already on the drawing board.

The ninth flight, on 25 July 1959, killed it. Morel attempted a transition to horizontal flight, lost pitch control as the aircraft entered a dangerous nose-up attitude, and ejected at low altitude. He survived with severe injuries; the Coléoptère was destroyed. Post-crash analysis identified the core problem: the pilot had no attitude reference during transition. Looking straight up through a narrow canopy at empty sky, with no horizon and sluggish gyro instruments, Morel simply couldn't tell which way the aircraft was pointing. The annular wing itself worked. The human in the loop didn't.

SNECMA cancelled the program within months. The tail-sitter concept died across the industry — Convair's XFY-1 Pogo and Lockheed's XFV-1 had hit the same wall in the US in 1955 for the same reason.

Sixty-seven years later, every one of those objections has evaporated:

• Attitude reference: MEMS IMUs cost $5 and update at 1 kHz. Fly-by-wire holds attitude precisely; the pilot commands velocity vectors, not stick positions. This is exactly how quadcopters transition.
• Transition control: modern flight computers can blend thrust-vectoring, control surfaces, and puffer jets seamlessly. The F-35B does this every landing.
• Annular wing aerodynamics: CFD has confirmed von Zborowski's math. Ring wings show up in modern drone concepts (Lockheed's Ring-Wing UAV studies, several eVTOL patents) precisely because they eliminate tip vortices and package neatly.
• Uncrewed operation: the pilot-disorientation problem simply doesn't exist for a drone.

A modern Coléoptère — unmanned, fly-by-wire, with a small turbofan or electric ducted fan — would be a compact loitering VTOL that launches from a pad the size of a manhole cover and cruises horizontally on ring-wing lift. The concept was killed by 1959 avionics, not 1959 aerodynamics.