We’re introduced to the traditional two-stroke diesel engine as thermally ... but much more inefficient. The free piston engine, a design with opposed pistons working against compressed air ...

We’re introduced to the traditional two-stroke diesel engine as thermally ... but much more inefficient. The free piston engine, a design with opposed pistons working against compressed air ...

His "motorised (sic) velocipede," as one witness described it, employed a four-stroke ... horizontally opposed. The engine used two crankshafts and six connecting rods. Each piston was connected ...