Renault 70 hp

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The Renault 70 hp or Type WB was a British V-8 aero engine that first ran circa 1913. The engine was manufactured by Renault Limited of West Brompton, London between August 1914 and December 1918, three other companies, including Rolls-Royce, also produced the engine. A variant known as the Type WC used an external oil pump as opposed to the internal pump of the Type WB.^[1] The Renault V-8 engines were noted as inefficient but reliable, the inefficiency being mainly due to the excessively rich fuel/air mixture used to assist cooling.^[2]

Applications

Airco DH.1
Armstrong Whitworth F.K.2
Armstrong Whitworth S.S.27 airship
Blackburn Type E
Bristol B.R.7
Caudron G.3
Central Centaur IVA
Farman MF.7 Longhorn
Farman Shorthorn
Flanders F.4
HMA no.2 airship, short-lived modification
Royal Aircraft Factory B.E.2
Royal Aircraft Factory F.E.2
Royal Aircraft Factory R.E.1
White & Thompson Bognor Bloater

Specifications (70 hp)

Data from Lumsden ^[1]

General characteristics

Type: Inline air–cooled, upright, 90-degree, V-8 piston engine
Bore: 3.54 in (90 mm)
Stroke: 4.72 in (120 mm)
Displacement: 423.76 cu in (7 L)
Length: 45.5 in (1,156 mm)
Width: 29.8 in (757 mm)
Height: 32.8 in (833 mm)
Dry weight: 396 lb (180 kg)

Components

Valvetrain: Single overhead exhaust valve, single side inlet valve per cylinder
Fuel system: Single carburettor
Fuel type: 40–50 octane petrol
Cooling system: Air-cooled
Reduction gear: 0.5:1, left hand tractor

Performance

Power output: 70 hp (52 kW) at 1,750 rpm (takeoff power)
Specific power: 0.17 hp/cu in (7.4 kW/L)
Compression ratio: 4.12:1
Power-to-weight ratio: 0.18 hp/lb (0.28 kW/kg)

References

Notes

↑ 1.0 1.1 Lumsden 2003, p. 180
↑ Gunston 1989, p. 135.

Bibliography

Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.

v t e Renault aero engines

35-40 hp V-4 45 hp V-8 60 hp V-8 70 hp Type WB 70 hp Type WC 80 hp Type WS 100 hp V-8 130 hp V-8 90 hp V-12 12D 100 hp V-12 120 hp V-12 160 hp 190 hp V-12 200 hp V-12 220 hp V-12 12E 265 hp V-12 300 hp V-12 12F 320 hp V-12 12Fe 4B 4P 6P 6Q 7A 8A 8B 8C 8G 9A 9C 9P 12D 12E 12F 12H 12J 12K 12M 12N 12R 12S 18J Renault Bengali 4 Renault Bengali 6

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