SO1221 Djinn F-BMLO on a spraying sortie at Broad Gate, Weston Hills in August 1969.

Самолёты на фотографии: Aircrafts on the photo: Sud-Ouest SO.1220 / SO.1221 Djinn - ФранцияFrance - 1953

The first prototype SNCASO SO1220 Djinn helicopter F-WCZX seen on its first flight 2.1.53 powered by a Turbomeca Palouste turbojet engine which supplied compressed air to the tip drive rotor.

Самолёты на фотографии: Aircrafts on the photo: Sud-Ouest SO.1220 / SO.1221 Djinn - ФранцияFrance - 1953

A side view of F-WCZX airborne shows the layout of the proof-of-system prototype with the single pilot in the open air and single rudder on the tail boom directly behind the 260 shp Palouste Jetstream

Самолёты на фотографии: Aircrafts on the photo: Sud-Ouest SO.1220 / SO.1221 Djinn - ФранцияFrance - 1953

Djinn second prototype during platform landing trials seen from astern shows the triangular form of the single-seat airframe which was intended to test the air-driven tip drive system with no unnecessary complications.

Самолёты на фотографии: Aircrafts on the photo: Sud-Ouest SO.1220 / SO.1221 Djinn - ФранцияFrance - 1953

Illustrating the principle by which the Djinn was powered, a close-up of the rotor head of the type fitted to the early models of the SO1221. This shows the compressed air duct rising from the right and its entry to the bellows chamber at the base of the hub, also the bob-weight stabiliser at 90 degrees to the blades. The hot air prevented any risk of blade icing.

Самолёты на фотографии: Aircrafts on the photo: Sud-Ouest SO.1220 / SO.1221 Djinn - ФранцияFrance - 1953

The second prototype SO1220 F-WGVD making trial landings on a vehicle platform. Slight differences from the first prototype can be seen in the air duct system but these were not technically significant.

Самолёты на фотографии: Aircrafts on the photo: Sud-Ouest SO.1220 / SO.1221 Djinn - ФранцияFrance - 1953

The Sud-Ouest S.O. 1120 Jet-driven helicopter (Turbomeca Arius turbo-compressor unit).
The world's first turbine helicopter was the SO1120 Ariel 3 F-WFUY which first flew in the spring of 1951. This very modern-looking machine even made use of air fed through a nozzle at the end of the tail boom to counter the yaw generated by the rotation of the main rotor, the principle on which today's NOTAR helicopters are based. Unfortunately, although ahead of its time, the Ariel III's Turbomeca Artouste turbine suffered from high fuel consumption and this led to French helicopter research and development taking a different path.

Самолёты на фотографии: Aircrafts on the photo: Sud-Ouest SO.1100 Ariel - ФранцияFrance - 1947