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Renault 6Q

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Renault 6Q
Renault 6Q on display at the Polish Aviation Museum
Type 6-cylinder inverted air-cooled inline
National origin France
Manufacturer Renault
First run c.1932
Number built >3360

The Renault 6Q, also called the Renault Bengali 6, is an air-cooled inverted in-line six-cylinder, aircraft piston engine, producing about 160 kW (220 hp) continuous power. It was designed and built in France and produced for more than ten years after its homologation in 1936, with large numbers built during World War II.[1][2]

Design and development

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The six-cylinder Renault 6Q and the four-cylinder Renault 4P, both from the early 1930s, shared the same bore, stroke and pistons.[3]

The 6Q was built in both unsupercharged and supercharged forms. The centrifugal supercharger was added at the back of the engine, driven off the crankshaft via step-up gearing. It added 13 kg (29 lb) to the weight and 242 mm (9.5 in) to the length but boosted the performance at altitude to a continuous power of 177 kW (237 hp) at 2,500 rpm and 2,200 m (7,220 ft). Two pre-war models were optimised to different altitudes, the 02/03 right- and left-handed pair to 2,000 m (6,560 ft), with 7.61:1 gearing and the 04/05 pair to 4,000 m (13,120 ft), with 12.274 gearing.[4]

Operational history

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The 6Q was homologated in 1936; 1700 were built before the war and 1660 during it.[2] Post-war, production was resumed.[3] The majority of pre-war 6Qs were used in Caudron C.440 Goélands, during the war in Goélands and post-war in Nord's Messerschmitt Bf 108 derived Nord Pingouin, in the Nord Noralpha and Ramier Bf 108 developments.

Variants

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Renault 6Q-10A mounted on a Nord 1002 Pingouin

Even sub-type numbers rotate clockwise, odd numbers anti-clockwise as seen from engine.[4]

Renault 6Q-00/01
Unsupercharged LH/RH rotation
Renault 6Q-02/03
220 hp (160 kW) Supercharged to 2,000 m (6,600 ft) LH/RH rotation
Renault 6Q-04/05
240 hp (180 kW) Supercharged to 4,000 m (13,000 ft) LH/RH rotation
Renault 6Q-06/07
233 hp (174 kW) LH/RH rotation
Renault 6Q-08/09
240 hp (180 kW) LH/RH rotation
Renault 6Q-10/11
230 hp (170 kW) LH/RH rotation
Renault 6Q-18/19
LH/RH rotation
Renault 6Q-20/21
300 hp (220 kW) LH/RH rotation

Applications

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Engines on display

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Specifications (post-war unsupercharged)

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Data from Jane's All the World's Aircraft 1948, p.55d[3]

General characteristics

  • Type: 6-cylinder inverted air-cooled inline
  • Bore: 120 mm (4.72 in)
  • Stroke: 140 mm (5.51 in)
  • Displacement: 9.5 L (580 cu in)
  • Length: 1,600 mm (63.0 in)
  • Width: 510 mm (20.1 in)
  • Height: 920 mm (36.2 in)
  • Dry weight: 240 kg (529 lb) dry

Components

Performance

  • Power output: Take-off 174 kW (233 hp) at 2,500 rpm; normal 163 kW (218 hp) at 2,500 rpm and 500 m (1,640 ft)
  • Compression ratio: 6:1

See also

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Related development

Comparable engines

Related lists

References

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  1. ^ Gunston, Bill (1998). World Encyclopaedia of Aero Engines (4 ed.). Wellingborough: Patrick Stephens Ltd. p. 149. ISBN 1-85260-163-9.
  2. ^ a b Gerard Hartmann. "Les Moteurs d'Aviation Renault" (PDF). p. 24. Retrieved 14 March 2014.
  3. ^ a b c Bridgman, Leonard (1948). Jane's All the World's Aircraft 1948. London: Sampson, Low, Marston and Co. Ltd. p. 55d.
  4. ^ a b Grey, C.G. (1972). Jane's All the World's Aircraft 1938. London: David & Charles. p. 53d. ISBN 0715-35734-4.
  5. ^ Ogden, Bob (2009). Aviation Museums and Collections of Mainland Europe. Air Britain (Historians) Ltd. p. 125. ISBN 978-0-85130-418-2.