The straight-eight engine or inline-eight engine is an eight-cylinder internal combustion engine with all eight cylinders mounted in a straight line along the crankcase. The type has been produced in side-valve, IOE, overhead-valve, sleeve-valve, and overhead-cam configurations.
Delage straight-eight racing engine
Dual overhead camshaft Duesenberg Model J engine
REO Straight 8 from 1931-1934
1940s OHV Oldsmobile straight-8 engine
A crankshaft is a mechanical component used in a piston engine to convert the reciprocating motion into rotational motion. The crankshaft is a rotating shaft containing one or more crankpins, that are driven by the pistons via the connecting rods.
Crankshaft, pistons and connecting rods for a typical internal combustion engine
Marine engine crankshafts from 1942
Flying arm (the boomerang-shaped link between first and second crankpins) on a crankshaft)
Forged crankshaft