Abstract: An ocean wave energy converter comprising a structure that is supported above the water and that has means to stabilize the structure, an array of guided independently operated elongate floats that operate from the structure above via two or more guidance arms, wherein each guidance arm is attached to the structure so that the floats pivot about the horizontal axis parallel the length of the floats, each float is attached to the guidance arms at the center of buoyancy of the float, and the floats are substantially parallel to the wave fronts.

Abstract: An ocean wave energy converter comprising a structure that is supported above the water and has means to stabilise the structure, an array of guided independently operated elongate floats that operate from the structure above via two or more guidance arms, each guidance arm is attached to the structure so that the floats pivot about the horizontal axis parallel the length of the floats, each float is attached to the guidance arms at the centre of buoyancy of the float, and the floats are substantially parallel to the wave fronts.

Abstract: An internal combustion engine power unit comprises two power cylinders (3, 4) spaced equidistant about a pumping cylinder (5). All cylinders operate on two-stroke cycles, the power cylinders (3, 4) having a phase difference of 180.degree.. Power piston assemblies (13, 14) in the power cylinders (3, 4) drive crankshaft (1). Pumping piston (16) and separate crankshaft (2) are driven at twice the cyclic speed of the power pistons (13, 14) and crankshaft (1) through gear train (6, 7) between the respective crankshafts (1, 2). Air inducted into pumping cylinder (5) via intake ports (20) is compressed and passed alternately to power cylinders (3, 4) via valve controlled transfer passages (21, 24). All valves, ports and gas passages are found in a cylinder head (19). Timed fuel injection and ignition are provided. An engine may comprise one or more power units. There is also disclosed a turbo-charged diesel engine comprising two power units in "V" configuration.