Moteur Renard 120 HP
The "Société anonyme des avions et moteurs Renard", with a capital of 2 million francs of the time, was formed in April 1925 in order to produce aircraft engines. The first aircraft engine, the type 100, was released in 1927 and raised a lot of interest. It was a five cylinders radial air-cooled engine whose main feature was the ease of production of its various components. The steel cylinders had neither base to secure the bolts nor projections and can thus be executed entirely on the lathe. Renard had also developed a simplified valve system which operated through a system of eccentric gears with rollers at their periphery. This system had no cam with a difficult to manufacture profile or whose shape varies with wear. This simplified valve system will be patented in several countries. The motor had a starting magneto and the carburetor had an air flap allowing an easy and fast startup. It can be equipped on request with a compressed air starter. It will be used on R.S.V., the R-16, R-17, the three-engined R-30, as well as machines designed by other Belgian manufacturers like Guldentops. Engines will also be sold in Poland and in the United States. The type 100, rated at 100 hp, will be gradually developed. It will become the type 120 of 120 hp and 1750 rpm and, after modification of the cylinder head, the type 140, rated at 140 hp. More powerful engines will be developed like the Renard 200, 9-cylinders radial of 240 hp. Coupled with a supercharger developed in collaboration with the Université Libre de Bruxelles, it will equip the R-34 and the experimental Florine II helicopter when it performed a world record for flight duration in 1933.

A few engines miraculously survived the Second World War and belong to the manufacturer's family. One engine was donated to the BAPA association in 2022 by Mr Alfred-François Renard. 
 
Characteristics: 
5 cylinders air-cooled radial, 2 valves per cylinder. 
Power rating: 140 hp at 1750 rpm. 
Bore: 120 mm 
Stroke: 145 mm 
Cylinder volume: 1640 cm3 
Displacement: 8200 cm3 
Total weight: 130 kg 
Diameter: 1.08 m 
Compression ratio: 5.3 
Direction of rotation: clockwise 
Fuel consumption: 235 gr/hp 
Oil consumption: 12 gr/hp 
Oil pressure: 3 to 4 kg 
Carburetor: Zenith 
Ignition: 2 Scintilla M.N.D.5D magnetos 
 
status:
engine complete without accessories. On display at the workshop
Above: The Renard 120 as received.
Here under: the same engine, after a good refurbishment, is now displayed at the workshop.
Here under: The Renard 120HP powered  several aircafts amongst which the Avro 504K, the R-17, the R-33, the R-30 and the Saint-Michel