Odd-cylinder V-type internal combustion engine
Offset crankshaft mechanism for an internal combustion engine
One-piece lost foam pattern for an intake manifold
One-piece wave deflector for I.C. engine intake system
Opposed piston combustion engine
Opposed piston internal combustion engine with special scavengin
Opposed piston swash plate engine
Opposed reciprocating piston internal combustion engine
Oscillatory motion apparatus
Oscillatory motion apparatus
Oscillatory motion apparatus
Outboard engine
Overhead camshaft V-2 engine