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 Water is heated to 230 degrees F. to make steam by solar heat or by a least costly available fuel of choice. Steam is then condensed by use of a cooling fluid (water) which forms a vacuum in the entire space of a cylinder. Atmospheric air pressure, which is free of cost, exerts force to fill the empty cylinder. When the valve to the cylinder opens, air under pressure pushes the piston in the cylinder end-to-end with great force in a power stroke. Twin piston rods are bolted together which makes possible the intake-of-steam stroke in one cylinder during the power stroke action in the twin cylinder. Strokes alternate in the cylinders at a rapid rate -- an average of 120/min. The piston power stroke force in a 6" diameter piston is about 400 lbs. The power product is 48,000 lbs. - equivalent of 1.4 horsepower. Thus solar heat is changed to horsepower. Solar heat is clean, green, with no air pollution. Steam may come from cogeneration which uses "waste steam" at a low cost. The Bishop STV Engine requires the lowest pressure of any engine using steam. It uses only 1 - 5 psi. to fill a cylinder with steam.
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