Renault 12R
| Renault 12R | |
|---|---|
| |
| 12R at Retromobile in 2012 | |
| Type | Air cooled in-line |
| National origin | France |
| Manufacturer | Renault |
| First run | 1935 |
| Major applications | Caudron C.714 |
| Number built | 325 |
The Renault 12R was an
Design and development
The 12R was developed by Renault in the 1930s.[1] The design was derived from the successful Renault Bengali, using the same construction techniques and being of essentially steel construction.[2][3] It was based on the 4.46, a test engine developed by mounting two 6Q six-cylinder engines on the same crankshaft.[4] The engine retained the bore and stroke of the smaller engine.[5] The cylinders and pistons were made of forged steel and connected in pairs to an eight bearing crankshaft. The crankcase was made of aluminium alloy coated with magnesium. A centrifugal supercharger was mounted to the rear.[6] The engine was produced in both right handed and left handed versions, the difference being the direction of propeller rotation.[7]
Designed to be fitted to a range of aircraft, both civil and military, the engine was originally rated at 450
Variants
- Renault 12R
- 450 hp (340 kW)[11]
- Renault 12Rb
- 470–480 hp (350–360 kW)[8]
- Renault 12Rc
- 500 hp (370 kW)[8]
- Renault 12Rm
- 480 hp (360 kW)[9]
- Renault 12Ro
- 450 hp (340 kW)[11]
- Renault 12R-00
- 500 hp (370 kW) LH rotation[7]
- Renault 12R-01
- 500 hp (370 kW) RH rotation[7]
- Renault 12R-02
- 500 hp (370 kW)[12]
- Renault 12R-03
- 500 hp (370 kW)[4]
- Renault 12R-09
- 500 hp (370 kW)[13]
- Renault 12R Spécial
- 730 hp (540 kW)[9]
Applications
- Caudron C-446[9]
- Caudron C.560[9]
- Caudron C.581[9]
- Caudron C.710[9]
- Caudron C.712[9]
- Caudron C.714[14]
- Caudron C.870[13]
- Dewoitine D.720[15]
- Dewoitine D.750[16]
- Hanriot H.220 (prototype only)[17]
- Romano R.110[18]
Specifications (12R-00)
Data from Aircraft Engines of the World [7]
General characteristics
- Type: 12-cylinder, air cooled V12 engine
- Bore: 120 mm (4.7 in)
- Stroke: 140 mm (5.5 in)
- Displacement: 19 L (1,159 in3)
- Length: 2,072 mm (81.6 in)
- Width: 680 mm (27 in)
- Height: 929 mm (36.6 in)
- Dry weight: 439 kg (968 lb)
Components
- overhead valvesper cylinder operated by pushrods
- Supercharger: Single speed centrifugal compressor
- Fuel type: 87 Octane petrol
- Cooling system: Air-cooled
Performance
- Power output:
- Take-off: 500 hp (373 kW) at 2,500 rpm
- Cruise: 300 hp (224 kW) at 2,500 rpm at 4,000 m (13,000 ft)
- Military: 450 hp (336 kW) at 2,100 rpm at 4,000 m (13,000 ft)
- Compression ratio: 6.4:1
- Fuel consumption: 225 g/(hp•h) (0.50 lb/(hp•h))
- Oil consumption: 10 g/(hp•h) (0.022 lb/(hp•h))
See also
Related development
Comparable engines
- Alfa Romeo 122
- Argus As 410
- de Havilland Gipsy Twelve
- Isotta Fraschini Gamma
- Junkers Jumo 210
- Ranger V-770
- Walter Sagitta
Related lists
References
Citations
- ^ Gunston 1998, p. 135.
- ^ Grey & Bridgman 1938.
- ^ Wilkinson 1945, p. 58.
- ^ a b c Ailes Anciennes Le Bourget.
- ^ Wilkinson 1945, pp. 245–247.
- ^ Angle 1941, p. 120.
- ^ a b c d Wilkinson 1945, p. 247.
- ^ a b c Hartman 2015, p. 31.
- ^ a b c d e f g h Hartman 2015, p. 32.
- ^ Angelucci et al. 1978, p. 258.
- ^ a b Hartman 2015, p. 22.
- ^ Hauet 2002, p. 202.
- ^ a b Hauet 2002, p. 229.
- ^ Green & Swanborough 1994, p. 111.
- ^ Green 1967, p. 22.
- ^ Green 1967, p. 25.
- ^ Green & Swanborough 1994, p. 280.
- ^ Green & Swanborough 1994, p. 503.
Bibliography
- Ailes Anciennes Le Bourget. "Le moteur du Caudron CR.714" (in French). Retrieved 29 May 2019.
- Angelucci, Enzo; Matricardi, Paolo; Cosentino, Vincenzo; Tatangelo, Claudio (1978). World War II Airplanes. Chicago: Rand McNally. ISBN 978-0-52888-170-1.
- Angle, Glen D. (1941). Modern Aircraft Engines. New York City: Aircraft Publications. OCLC 658901703.
- Green, William (1967). War Planes of the Second World War: Volume 8 Bombers and Reconnaissance Aircraft. London: MacDonald. OCLC 1064406192.
- Green, William; Swanborough, Gordon (1994). The Complete Book of Fighters. London: Salamandar. ISBN 978-0-86101-643-3.
- Grey, C.G.; Bridgman, Leonard (1938). Jane's All the World's Aircraft 1938. London: Sampson, Low & Martin Company Limited.
- Gunston, Bill (1998). World Encyclopedia of Aero Engines. London: P. Stephens. ISBN 978-1-85260-597-1.
- Hartman, Gerard (2015). "Les Moteurs d'Aviation Renault" (PDF). hydroretro.net (in French). Retrieved 29 May 2019.
- Hauet, André (2002). Les Avions Caudron (in French). Vol. 2. Le Vigen: Lela Presse. ISBN 978-2-91401-709-1.
- Wilkinson, Paul Howard (1945). Aircraft Engines of the World. New York: Paul H. Wilkinson. ISBN 978-0-91171-024-3. Retrieved 29 May 2019.