Word: hull
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...ships to transport heavy, bulky cargoes. At the roots of its undersized wings, which resemble Flipper's flippers, are four jet engines with a combined thrust of 164,000 Ibs. There are also two small engines near the wing tips to control yawing and rolling. The 650-ft. hull would have 7 million cu. ft. of buoyant helium in its gas cells...
...promote the "Airfloat HL" (for heavy-lift), designed by Surrey University Mechanical Engineer Edwin Mowforth. A VTOL (vertical takeoff and landing) model, it could carry a load of up to 400 tons and move it more than 1,000 miles at about 90 m.p.h. Airfloat's hull shape is conventional, and its propulsion depends upon old-fashioned propellers turned by ten turbines. Eight of them are amidships for forward drive and are also capable of exerting a vertical thrust of 40 tons. There is also one engine at each end for maneuvering, and to keep the ship from yawing...
Wood was out and aluminum was in. That was the new gospel circulating in the rarefied world of 12-meter yachting after the last America's Cup races in 1970. No matter that aluminum-hull boats had never competed in yachting's most prestigious international competition. Designers were convinced that the lightweight metal vessels would be speedier and cheaper to build. Olin Stephens, the world's foremost yacht designer, who conceived three of the last five Cup winners, created Courageous...
...American defender until final trials next month; it is still too soon for the aluminum backers to abandon ship. Optimism, though, is difficult to find in the Mariner camp. Brit Chance's boat was in drydock last week undergoing major surgery. The reason: her radical design -a hull that had a blunt, "fastback" stern instead of the traditional tapered underbody-simply had not worked...
Hard Lessons. Chance nonetheless pushed ahead. Tank tests were indeed glowing, and he was convinced that Mariner's sawed-off stern would produce less water resistance along the boat's hull and increase her speed. The results, of course, could not have been worse. Mariner lost her first two meetings with Courageous by four and eight minutes at a regatta on Long Island Sound in June...