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Renault 12R

March 08, 2023

The Renault 12R was an air-cooled inverted V12 aircraft engine developed by the French engineering company Renault in the 1930s. The design was based on mounting two 6Q six-cylinder engines on a single crankshaft. In production, the engine was rated between 450 and 500 hp (340 and 370 kW), although a high performance version built for the sole Caudron C.712 racing special produced 730 hp (540 kW). More than one third of production went to power the Caudron C.714 light fighter that fought in the early stages of World War II for the French and Polish Air Forces.

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

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 horsepower (340 kW) when first introduced in 1935. However, the majority manufactured, 290 out of a total production of 325, were the 500 hp (370 kW) 12Rc introduced in 1939.[8] Of these, 120 powered the Caudron C.714 light fighter that served in World War II.[9] In addition to examples of the aircraft ordered the French Air Force, thirty-five were delivered to the Polish Air Force in France and a further six to the Finnish Air Force, although the latter were not used in combat.[10] The most powerful version was the 12R Spécial of 1937 which produced 730 hp (540 kW) at 3250 rpm and powered the single C.712 racing aircraft derived from the fighter.[4]

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

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

Performance

  • Power output:
    • Take-off: 500 hp (373 kW) at 2500 rpm
    • Cruise: 300 hp (224 kW) at 2500 rpm at 4,000 m (13,123 ft)
    • Military: 450 hp (336 kW) at 2100 rpm at 4,000 m (13,123 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

Related lists

References

 
Wikimedia Commons has media related to Renault 12R.

Citations

  1. ^ Gunston 1998, p. 135.
  2. ^ Grey & Bridgman 1938.
  3. ^ Wilkinson 1945, p. 58.
  4. ^ a b c Ailes Anciennes Le Bourget.
  5. ^ Wilkinson 1945, pp. 245–247.
  6. ^ Angle 1941, p. 120.
  7. ^ a b c d Wilkinson 1945, p. 247.
  8. ^ a b c Hartman 2015, p. 31.
  9. ^ a b c d e f g h Hartman 2015, p. 32.
  10. ^ Angelucci et al. 1978, p. 258.
  11. ^ a b Hartman 2015, p. 22.
  12. ^ Hauet 2002, p. 202.
  13. ^ a b Hauet 2002, p. 229.
  14. ^ Green & Swanborough 1994, p. 111.
  15. ^ Green 1967, p. 22.
  16. ^ Green 1967, p. 25.
  17. ^ Green & Swanborough 1994, p. 280.
  18. ^ 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.

March 08, 2023
renault, cooled, inverted, aircraft, engine, developed, french, engineering, company, renault, 1930s, design, based, mounting, cylinder, engines, single, crankshaft, production, engine, rated, between, although, high, performance, version, built, sole, caudron. The Renault 12R was an air cooled inverted V12 aircraft engine developed by the French engineering company Renault in the 1930s The design was based on mounting two 6Q six cylinder engines on a single crankshaft In production the engine was rated between 450 and 500 hp 340 and 370 kW although a high performance version built for the sole Caudron C 712 racing special produced 730 hp 540 kW More than one third of production went to power the Caudron C 714 light fighter that fought in the early stages of World War II for the French and Polish Air Forces Renault 12R12R at Retromobile in 2012Type Air cooled in lineNational origin FranceManufacturer RenaultFirst run 1935Major applications Caudron C 714Number built 325 Contents 1 Design and development 2 Variants 3 Applications 4 Specifications 12R 00 4 1 General characteristics 4 2 Components 4 3 Performance 5 See also 6 References 6 1 Citations 6 2 BibliographyDesign and development EditThe 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 horsepower 340 kW when first introduced in 1935 However the majority manufactured 290 out of a total production of 325 were the 500 hp 370 kW 12Rc introduced in 1939 8 Of these 120 powered the Caudron C 714 light fighter that served in World War II 9 In addition to examples of the aircraft ordered the French Air Force thirty five were delivered to the Polish Air Force in France and a further six to the Finnish Air Force although the latter were not used in combat 10 The most powerful version was the 12R Special of 1937 which produced 730 hp 540 kW at 3250 rpm and powered the single C 712 racing aircraft derived from the fighter 4 Variants EditRenault 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 Special 730 hp 540 kW 9 Applications EditCaudron 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 EditData 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 Valvetrain 2 x overhead valves per cylinder operated by pushrods Supercharger Single speed centrifugal compressor Fuel type 87 Octane petrol Cooling system Air cooledPerformance Power output Take off 500 hp 373 kW at 2500 rpm Cruise 300 hp 224 kW at 2500 rpm at 4 000 m 13 123 ft Military 450 hp 336 kW at 2100 rpm at 4 000 m 13 123 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 EditRelated development Renault 4P Renault 6QComparable engines Alfa Romeo 122 Argus As 410 de Havilland Gipsy Twelve Isotta Fraschini Gamma Junkers Jumo 210 Ranger V 770 Walter SagittaRelated lists List of aircraft enginesReferences Edit Wikimedia Commons has media related to Renault 12R Citations Edit Gunston 1998 p 135 Grey amp 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 amp Swanborough 1994 p 111 Green 1967 p 22 Green 1967 p 25 Green amp Swanborough 1994 p 280 Green amp Swanborough 1994 p 503 Bibliography Edit 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 amp 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 Andre 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 Retrieved from https en wikipedia org w index php title Renault 12R amp oldid 1126738408, wikipedia, wiki, book, books, library,

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