First flown in 1951, the Arbalète (Crossbow) was a scaled-down aerodynamic prototype for the projected N-20 Aiguillon jet fighter. Powered by four tiny Turboméca turbojets, the Arbalète achieved 750 km/h (466 mph). One of the lower engines is just visible under the wing.
This was the prototype of the first Swiss built jet aircraft though it never went into production and it was the sole example built. It first flew in November 1951 and is seen in the Swiss Transport Museum