The Renault 4P, also called the Renault Bengali Junior, was a series of air-cooled 4-cylinder inverted inline aero engines designed and built in France from 1927, which produced from to .

Design and development

Charles Lindbergh Charles Augustus Lindbergh (February 4, 1902 – August 26, 1974) was an American aviator, military officer, author, inventor, and activist. On May 20–21, 1927, Lindbergh made the first nonstop flight from New York City to Paris, a distance o ...

Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...

crossing in 1927 inspired Renault to enter the light aero-engine market to diversify the range of engines they offered. The resulting Renault 4Ps, with bore and stroke, delivered and proved popular, later versions powering several record-breaking light aircraft. Developed by Charles-Edmond Serre, by 1931 the 6.3-litre 4Pdi had evolved to give to , with the adoption of bore steel cylinder liners,

aluminium alloy An aluminium alloy (or aluminum alloy; see spelling differences) is an alloy in which aluminium (Al) is the predominant metal. The typical alloying elements are copper, magnesium, manganese, silicon, tin, nickel and zinc. There are two principa ...

cylinder heads attached by long studs to the crankcase, Duralumin connecting rods and

magnesium alloy Magnesium alloys are mixtures of magnesium (the lightest structural metal) with other metals (called an alloy), often aluminium, zinc, manganese, silicon, copper, rare earths and zirconium. Magnesium alloys have a hexagonal lattice structure, w ...

crankcase. The 4Pei was produced in the

USSR The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen nationa ...

, with local equipment and features from the

MV-6 The Renault 6P, also called the Renault Bengali, was a series of air-cooled 6-cylinder inverted in-line aero engines designed and built in France from the late 1920s, which produced from to . Design and development Charles Lindbergh's Atlantic ...

, as the Voronezh MV-4 (''Motor Vozdushniy'' / ''Motor Voronezhskiy'' - air-cooled engine / Voronezh built engine ). In 1946 production of the Renault 4P-01 resumed at the

SNECMA Safran Aircraft Engines, previously Snecma (''Société nationale d'études et de construction de moteurs d'aviation'') or Snecma Moteurs, is a French aerospace engine manufacturer headquartered in Courcouronnes and a subsidiary of Safran. It ...

factory at Arnage, until 1949, with at least 762 engines manufactured.

Variants

;Renault 4Ps :The initial version with bore and stroke, delivered ;Renault 4Pa : ;Renault 4Pb :upright / - Caudron Luciole ;Renault 4Pbi :Inverted development of the Pb retaining the bore ;Renault 4Pc :Further development of the Ps retaining the bore ;Renault 4Pci :inverted 4Pc ;Renault 4Pde : ;Renault 4Pdi :Inverted, introduced 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 __NOTOC__ The Lorraine-Hanriot LH.10 was a family of training monoplanes built in France in the early 1930s, the most widely produced and well-known member of which was the LH.16, later known simply as the Hanriot H.16. It was a conventional para ...

, 120 hp / 155 kg -

Caudron Phalène The Société des Avions Caudron was a French aircraft company founded in 1909 as the Association Aéroplanes Caudron Frères by brothers Gaston and René Caudron. It was one of the earliest aircraft manufacturers in France and produced planes for ...

;Renault 4Pei :Inverted, rated at for take-off, the 4Pei entered production before WWII ;Renault 4Pfi: ;Renault 4Pgi :Inverted lower rated version, giving for take-off, using 73-octane fuel. ;Renault 4Po : ;Renault 4Poi : with fuel injection. ;Renault 4P-01 :Postwar production version of the 4Pei, rated at for take-off. ;Renault 4P-03 :As the 4P-01 but with an inverted flight

Zenith carburettor The Zenith Carburetter Company Limited was a British company making carburettors in Stanmore Middlesex, founded in 1912 as a subsidiary of the French . In 1965, the company joined with its major pre-war rival Solex Carburettors, and ov ...

;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 ;MV-4:Licence production of a Renault 4Pei variant in the

at the

Voronezh Voronezh ( rus, links=no, Воро́неж, p=vɐˈronʲɪʂ}) is a city and the administrative centre of Voronezh Oblast in southwestern Russia straddling the Voronezh River, located from where it flows into the Don River. The city sits on ...

factory. 180+ were built in 1939 before production ceased, due to a shortage of indigenous carburettors.

Applications

Specifications (Renault 4P-01)

References

* Gérard Hartmann, ''Les Moteurs d'avion Renault'' *Wilkinson, Paul H.. ''Aircraft Engines of the World 1945 3rd edition''. Paul H. Wilkinson. 1945. New York. *Wilkinson, Paul H.. ''Aircraft Engines of the World 1946 revised edition''. Sir Isaac Pitman & Sons Ltd.. 1946. London. {{Renault aeroengines 1920s aircraft piston engines 4P

Design and development

Variants

Applications

Specifications (Renault 4P-01)

See also

References