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Renault 4P / Bengali 4

 

Charles Lindbergh's Atlantic Ocean crossing in 1927 inspired Renault to enter the light aero-engine market to diversify the range of engines they offered. The resulting Renault 4Ps, aka Renault Bengali 4, with 115 mm (4.5 in) bore and 140 mm (5.5 in) stroke, delivered 95 hp (71 kW) and proved popular, later versions powering several record-breaking light aircraft with up to 150 hp (110 kW).

Developed by Charles-Edmond Serre, by 1931 the 6.3-litre 4Pdi had evolved to give 110 hp (82 kW) to 120 hp (89 kW), with the adoption of 120 mm (4.7 in) bore steel cylinder liners, aluminium alloy cylinder heads attached by long studs to the crankcase, Duralumin connecting rods and magnesium alloy crankcase.

In 1946 production of the Renault 4P-01 resumed at the SNECMA factory at Arnage, until 1949, with at least 762 engines manufactured.

 

Variants:
Renault 4Ps
The initial version with 115 mm (4.5 in) bore and 140 mm (5.5 in) stroke, delivered 95 hp (71 kW)

Renault 4Pa

Renault 4Pb
95hp / 135kg - Caudron Luciole

Renault 4Pbi
Inverted development of the Pb retaining the 115 mm (4.5 in) bore

Renault 4Pc
Further development of the Ps retaining the 115 mm (4.5 in) bore

Renault 4Pci
inverted 4Pc

Renault 4Pde

Renault 4Pdi
Inverted, introduced 120 mm (4.7 in) bore steel cylinder liners, aluminium alloy cylinder heads attached by long studs to the crankcase, Duralumin connecting rods and magnesium alloy crankcase. 110 hp / 150 kg - Hanriot 16, 120 hp / 155 kg - Caudron Phalène

Renault 4Pei
Inverted, rated at 150 hp (110 kW) for take-off, the 4Pei entered production before WWII

Renault 4Pgi
Inverted lower rated version, giving 105 hp (78 kW) for take-off, using 73-octane fuel.
 
Renault 4Po

Renault 4Poi
140 hp (100 kW) with fuel injection.

Renault 4P-01
Postwar production version of the 4Pei, rated at 145 hp (108 kW) for take-off.
 
Renault 4P-03
As the 4P-01 but with an inverted flight Zenith carburettor

Renault 4P-05
As for the 4P-03 but with a modified oil system

Renault 4P-07
As for the 4P-03 but with a modified carburettor

Renault MV-4
Licence production of a 152hp Renault 4P variant.

 

Applications:
ANF Les Mureaux 160T
Aubert Cigale
Boisavia Mercurey
Caudron C.193
Caudron C.232
Caudron C.270 Luciole
Caudron C.280 Phalène
Caudron C.480 Frégate
Caudron C.510 Pelican
Farman F.230
Farman F.281
Farman F.350
Max Holste MH.52
Hanriot LH.16
Hanriot H.180
Morane-Saulnier MS.341
Nord Norécrin
Potez 36/19
SABCA S.40
Stampe et Vertongen SV-4B
Sud-Est SE-2100
Sud-Est SE-2300
Sud-Est SE-2310

 

Specifications:
Renault 4P-01
Type: 4-cylinder naturally aspirated air-cooled inverted in-line piston aircraft engine
Bore: 120 mm (4.7 in)
Stroke: 140 mm (5.5 in)
Displacement: 6.3 L (380 cu in)
Length: 1,729 mm
Width: 480 mm
Height: 708 mm
Dry weight: 147 kg
Valvetrain: Pushrod-actuated, single intake and single exhaust valve per cylinder
Fuel system: 1x Zenith 601GS down-draught carburettor
Fuel type: 80 Octane petrol
Oil system: Pressure fed, 3.0 kg/sq.cm (43 lbf/sq.in), dry sump
Cooling system: Air
Power output:
145 hp (108 kW) at 2,450 rpm @ take-off
140 hp (100 kW) at 2,400 rpm @ sea-level normal
110 hp (82 kW) at 2,200 rpm @ sea-level cruise
Specific power: 17.15 kW/L (0.38 hp/cu.in)
Compression ratio: 5.8:1
Specific fuel consumption: 0.186 kg/kW/hr
Oil consumption: 0.005 kg/kW/hr
Power-to-weight ratio: 0.74 kW/kg

 

 

 

 

 


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