Abstract: Turbine is added to the spinner of a propeller to provide a contribution to propulsive thrust of the propeller. The turbine comprises a group of turbine modules, which are mounted on the periphery of the spinner between root portions of the propeller blades. Each module includes a curved row of angulated turbine vanes held between a curved base plate and a curved outer plate.

Abstract: A compact light weight diesel cycle engine has a barrel arrangement of opposed-piston cylinders surrounding a power shaft that is rotationally supported on a plurality of transverse circular diaphragms attached at their perimeters to a sheet material shell. The cylinders are attached to and extend through at least some of the diaphragms to provide longitudinal structural members of the engine. Dual opposed cams are mounted on the power shaft at opposite ends of the cylinders and are coupled to the pistons by connecting rods. The cams are constructed to convert linear movement of the pistons to rotational movement of the power drive shaft. Toward the end of a power stroke, high pressure air is admitted to the cylinders through inlet ports that are opened before exhaust ports are opened. Heat exchangers use exhaust gas to pre-heat the air. Special fuel injectors use intersecting fuel jets to provide a high level of fuel atomization, turbulence, and dispersion in the cylinders.