Free-Piston and Turbine compound Engine–Status of the Development

THE history of the free-piston and turbine compound engine development is reviewed briefly. After consideration of the status here and abroad, the salient features of the free-piston engine concept are considered. These are mechanical simplicity, compactness, and an excellent torque-speed characteristic, coupled with a fuel economy comparable to the conventional diesel, the modern record holder in this respect.

Some prognostications for the future of the development in this country are also presented.