Abstract: A knockdown sailboat adapted to be stowed in a carrying case which includes inflatable hulls, a frame made up of longitudinal sectional tubular members connected securely to spaced-apart lateral tubular frame members, and a telescopic sectional mast stepped to the frame so formed. A carrying case is provided which is made up of two identical halves which serve as deck benches on each respective hull and provide a secure connection between the lateral frame members and the longitudinal frame members. Rigid tubular sectional shroud members are provided between the mast and the frame, and other rigging and spars are provided to make an operable sailboat. All of the spars, masts, and frame can be telescoped and stowed along with the deflated hulls into the carrying case formed by the two halves serving as deck benches.

Abstract: A series of U-shaped frames have their web and legs of progressively greater length. A smaller-size frame fits between and is pivoted to the free ends of the legs of the next larger-size frame. When the device is extended, each frame projects outwardly from an adjacent frame. In folded position, each frame nests within the next larger frame. At least some of the frames have ground-engaging teeth and the smaller-size frame has tire-engaging teeth.