Abstract: A displacement hull is formed by making a series of cuts in a curves sheet or panel of semi-resilient material. At least one primary cut begins at one end of the panel, and extends in one direction for a substantial distance along the panel, but terminates within the panel. At least one primary cut in the other direction runs substantially-parallel to the primary cut in the one direction and overlaps it for a substantial length of the hull. The panel must have enough resilliency, and the cuts from opposing directions must be long enough to provide at least one, elongated, relatively-narrow, very-flexible strip, within which the panel develops from a flat surface, at the termination of each of the primary cuts, to any desired angle at the start of each cut. Secondary cuts, curving away from the primary cuts along the flexible strip, in either direction, can provide various cruves to the keel or chines.

Abstract: A solar heat collector has a plurality of collector elements mounted in a fixed plane, parallel and adjacent to each other. Each of the collector elements has an outer casing of transparent material with one side facing the source of solar energy, and an other side coated with a reflective material. An inner tubular section of darkened material is positioned between the axis of the outer tubular casing and the reflective material of the other side of the outer tubular casing, whereat substantially all of the solar energy is refracted or reflected by the outer casing or the reflective material. The inner tubular section is designed to accommodate and heat a gaseous medium. The upper and lower ends of the inner tubes are connected to a system for storing or using the heated gasses after they are warmed by the solar energy.

Abstract: A solar heat collector uses elongated, tubular, outer casings, in a fixed position with respect to the solar orbit, surrounding inner tubular sections, carrying heat-conductive fluid. The outer casings are highly transparent and the walls of the outer casings are of substantial thickness and of a high refractive index to admit solar heat energy and to focus it on or towards the inner tubular sections or tubes that are of highly conductive material and have dark, heat-absorbing surfaces.One of the sides of the outer casings faces toward the sun. The other of the sides of the outer casings are coated with a highly reflective material to reflect any solar heat energy that by-passes the tubes, back to the inner tubes.Each of the casings is mounted in a substantially vertical plane, and the solar heat collector would normally consist of a plurality of such casings, or units, mounted side by side in a fixed plane approximately normal to the noonday, winter sun, or perpendicular to the sun's orbit.