Word: exhaustible
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...after another, Miss Jones directed mechanics in attaching to the Cirrus engine of a Moth biplane a muffler of her own invention. As the plane sped along the runway and over the hangars there were noises-of thrumming propeller, snapping pistons, vibrating metal-but there was no bark of exhaust...
Miss Jones's device, about 18 in. long, outwardly resembles an ordinary Ford automobile muffler. Inside is a series of small "pinwheels" which retard the speed of the exhaust gases-"chewing up" the sound waves without creating excessive back pressure upon the engine. (The latter factor, involving loss of power, has been the principal drawback to most attempts at muffling.) The pilot who tested the Jones muffler in flight said the engine lost none of its normal speed-1,900 r.p.m...
...principle. Among many other efforts, one like hers was created by one William Deal and exhibited in the 1929 Aeronautical Exposition of the American Legion in Manhattan by Curran Machine Works of Long Island City. Other methods under experiment are:1) to reduce the speed of the exhaust gases by rapid cooling and 2) employment of sound-absorbing material in the muffler -with the corresponding danger of the material catching fire...
...from the starting point. Reports were meagre, but it was known that the City of Tacoma, an Emsco monoplane, had been in the thick of headwinds, rain and peasoup fog in its course over the Kuriles Islands. One despatch indicated that the plane was forced back by a broken exhaust pipe...
...temperature. Why not, reasoned Inventor Claude, put warm surface sea water (between 79-86° F. in tropical seas) in a boiler, reduce the pressure and set it to boiling? Cold water could be brought up from 5,000 ft. below the sea's surface to condense the exhaust, maintain the vacuum. The cheap steam thus generated would whirl turbines, make electricity...