Abstract: An assembled sail powered vehicle, including: a sail; a frame for supporting the sail, the frame including a plurality of elongated rigid frame members, a plurality of joint assemblies releasably captured between the ends of respective of the frame members, and a plurality of elongated flexible members, the flexible members being connected between respective of the joint assemblies, and the flexible members and joint assemblies cooperating to apply compression loads to the frame members; and structure for supporting the frame for movement across a surface.