Abstract: This invention pertains to power for a boat, comprising a vertically mounted rotary sail device generally amidship of the boat, a power transmission driven by the sail device, pulley directed cable, connecting between the power transmission and a pair of opposed side oar devices normally disposed in the water. The sail device is constructed in a manner whereby it always rotates in the same direction regardless of the wind direction, creating a condition whereby the boat may be directed on a straight course toward any point of the compass. A second, lever operated cable and pulley is provided to control the oar devices in a manner so as to reverse the operation of the oars with a resulting reversal of direction of the boat.

Abstract: A wing to swim which includes a sleeve to attach to a member to be manipulated under water in generally fore to aft cycles of movement and an umbrella type collapsible canopy carried by the sleeve and moveable in response to water forces caused by the manipulation between canopy open position and a canopy collapsed position to propel an object through water.

Abstract: A molding device including a rigid container defining a molding chamber and a mating collapsible member with walls and a floor and of a normal size and shape to mate in the rigid container and define a molding space between the container and the collapsible member; the collapsible member includes means to collapse it through a first stage of movement of withdrawal of the walls inwardly from a molded object and a second stage of movement of withdrawal of the floor axially upwardly away from the container and a molded object.