The Ariel III was the first fully jet-powered helicopter to fly. The first of two prototypes, F-WFUY first flew on 18 April 1951 and is seen here on an early test flight. Replacing the piston engine and compressor of the earlier Ariels, a Turbomeca Arrius turbine-compressor fed compressed air to burners at the rotor tips. There was now room for a third seat. The Ariel III resulted in the SO.1221 Djinn. The location seems to be Villacoublay which apparently hosted the Ariel programme, Sud-Ouest (SNCASO) having taken over the Bloch facilities here. Photo from: Sud-Ouest