Object StatementAircraft engine, Renault A52, WWI, upright V8, air cooled, eight cylinders, 85 hp, 1800 rpm, steel/cast iron, engine No.2014, made by Wolseley Motors Ltd, Birmingham, England, 1915
Physical DescriptionAircraft engine, Renault A52, WWI, upright V8, air cooled, eight cylinders, 85 hp, 1800 rpm, steel/cast iron, engine No.2014, made by Wolseley Motors Ltd, Birmingham, England, 1915
Eight cylinder upright 90-degree Vee air-cooled poppet valve engine with 105mm x 130mm (4.13 inches x 5.12 inches) bore and stroke giving a capacity of 548.9 cu. in. Compression ratio: 4.16:1, spur geared propeller drive at 0.5:1, right hand pusher type (fitted with cooling fan). 'F' head arrangement for valves ie overhead exhaust, side inlet.
This aero engine is an eight-cylinder, 90 degree, V8, air-cooled radial engine where the propeller was driven at half engine speed from an extension to the camshaft. The cylinders are made from cast iron with cooling fins cast into the body. The cylinder head is separate from the cylinder and the two are bolted to the crankcase by long bolts engaging a cruciform yoke at the top of the cylinder head. The pistons are also cast iron. The intake and exhaust poppet valves are located laterally to the cylinders, on the inner side. The intake valve was directly actuated from the cam shaft by a push rod, while the exhaust valve was actuated via a rocker arm. Cooling air was supplied from a centrifugal blower mounted at the rear of the engine. The single magneto is a Bosch 'shield' type which produces four sparks per revolution of the cam shaft which was driven at engine speed. Fuel was supplied through a Zenith 42 RA carburettor.The engine operated on the four-stroke cycle with cylinder firing in the order 1-4-2-3 for each of the four cylinders in one line. Speed is controlled through a throttle valve in the carburettor.
Height: 760 mm
Length: 1140 mm
Width: 880 mm
Cylinder diameter: 105 mm
Piston stroke: 130 mm
Weight: 210 kg
Compression ratio: 4.16:1
"Wolseley Motors Ltd. Birmingham
Engine No. A52/2014 B.H.P 85 at 905. Tested 5-8-15: 2 hrs."