Abstract: A water bike has a frame supported on first and second spaced apart pontoons or similar floatation elements. Pedals are attached to cranks on a front sprocket rotatably supported on the frame. A chain or belt extends around the front sprocket and around a rear sprocket on a gearbox. An outdrive is supported on the gearbox and pivotal about a vertical axis relative to the gearbox. The combined outdrive and gearbox are pivotable about a horizontal axis relative to the frame. A propeller on the outdrive is mechanically linked to a first gear in the gearbox, with the first gear meshing with a second gear attached to the rear sprocket. A steering bar is pivotally attached to the frame. A steering linkage connects the steering bar to the outdrive, for pivoting the outdrive to steer the water bike.

Abstract: A water bike has a frame supported on first and second spaced apart pontoons or similar floatation elements. Pedals are attached to cranks on a front sprocket rotatably supported on the frame. A chain or belt extends around the front sprocket and around a rear sprocket on a gearbox. An outdrive is supported on the gearbox and pivotal about a vertical axis relative to the gearbox. The combined outdrive and gearbox are pivotable about a horizontal axis relative to the frame. A propeller on the outdrive is mechanically linked to a first gear in the gearbox, with the first gear meshing with a second gear attached to the rear sprocket. A steering bar is pivotally attached to the frame. A steering linkage connects the steering bar to the outdrive, for pivoting the outdrive to steer the water bike.

Abstract: A human powered watercraft has a bicycle type pedal and crank drive system linked to a propeller on a vane which positions the propeller below the water line, when in use. The propeller is driven via the crank drive system which may include gears, pulleys or sprockets linked to the propeller via belts or chains, and one or more reduction systems. A handle bar supported on the hull has a steering system connected for steering the vane, or the propeller on the vane, via cables.