Aircraft engine, partly sectioned, 'SpA Faccioli', with opposed pistons sharing a common combustion chamber, 8 cylinder, s/no A15635, 80 hp, model N.4, made by Italian automobile company Faccioli SpA, Turin, Italy, engine designed by Aristide Faccioli, 1911-1912
This sectioned aero engine features eight cylinders in a diamond configuration, angled at 20 degrees at the crankshafts and 160 degrees at the combustion chambers. Each opposed cylinder pair shared a common combustion chamber. Each cylinder pair has two spark plugs which were fired by two magnetos, one driven directly from the rear of each crankshaft. The cross shaft synchronizing the crankshafts also served as the camshaft. At the rear of the engine, the cross shaft drove pushrods that acted on rocker arms mounted to the top and bottom of the engine. The rocker arms actuated the one intake and one exhaust valve per cylinder pair, positioned at the centre of the cylinders. The intake manifold was positioned behind the engine, to the left of centre. The manifold fed the air/fuel mixture to a passageway in the cylinder casting that ran on the left side of the valves. The exhaust was expelled to the right of the valves.
Bore: 3.74 inches (95 mm)
Stroke: 5.91 inches (150 mm) stroke.
Displacement: 519 cubic inches (8.51 L)
80 hp (60 kW) at 1,200 rpm 90 hp (67 kW) at 1,600 rpm.
Width: 54 in (1.38 m)
Length: 32 inches (.82 m)
Height 22 inches (.57 m)
Weight: 441 lb (200 kg)
Reference Description of engine from "SPA-Faccioli Opposed-Piston Aircraft Engines" https://oldmachinepress.com/2017/07/05/spa-faccioli-opposed-piston-aircraft-engines/