History of aicraft piston engines

And except for wright airplanes which had flown for

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Unformatted text preview: a nd engines. Two important new engines ap19 p eared—the 35-hp R enault 8-cylinder air-cooled V-type (an 80-hp example is shown in fig. 17) a nd the Curtiss air-cooled V-type 8-cylinder (fig. 18) w hich powered a flight of 1 m in 43 sec in the June Bug on 4 July. And, except for Wright airplanes (which had flown for over an hour), the longest flight had been by Farman in a Voisin, 44 min on 2 October, until that day in 1908 that Wilbur Wright flew for 2 hr 20 min and 23 sec at Auvours, F rance. It was, according to a French commentator, "un des plus passionants spectacles qu'ait presents Vhistoire des sciences appliques.'1'' G lenn Curtiss was building and racing motorcycle engines soon after 1900. I n 1902 Thomas Baldwin engaged him to supply an engine for B aldwin's dirigible airship, which flew successfully in 1904. In 1907 C urtiss j oined the Aerial Experiment Association headed by Alexander Graham Bell, and thus began his d istinguished c areer as designer a nd b uilder of b oth airplanes and engines and as an airplane pilot. 5 Figure 17.—Renault 80-hp V-8 engine (NASM 1932-125), about 1916, with geared propeller drive (rating of the 1908 version was 35 hp at 1400 rpm, 242 lb). One of the earliest geared engines, it used long hold-down studs on the cylinders, a practice widely followed in later aircraft engines. (Photo A-42316-B) 20 Figure 18.—(Above) Glenn H. Curtiss in his airplane June Bug, showing its 8-cylinder air-cooled engine installed, 1908. (Below) The June Bug at Hammondsport, New York. (Photos A-3100, A-3101) 21 Curtiss's earliest engines were air-cooled, including the V-8 engine used in the famous June Bug. L ate in 1908, however, he settled on a watercooled V-8 engine similar to the Antoinette of Lavavasseur except that t he cylinders were of cast iron, with m onel-metal w ater jackets. N ext to the Wright brothers, Glenn Curtiss was certainly the most i mportant figure in early American aviation, both in engine and in airplane design. The most noteworthy engine which developed from his e arly work was the famous O X-5, to be described later. Engines bearing his name have an important place in aviation to this day. T he year 1909 has been called the "year of practical powered flying," because in that year flight began to be convincingly demonstrated by o thers than the Wright brothers. Four types of a irplane—Wright, A ntoinette, Farman, and B leriot—had m ade flights of more than an h our's duration. Bleriot made his famous cross-channel flight (37 min, 23.5 miles) on 25 July 1909. H is tractor monoplane was equipped with a 24.5-hp 3-cylinder A nzani fan-type air-cooled engine (fig. 19). Later Anzani built 1- and 2-row radial air-cooled engines that were used in a number of airplanes p rior to and soon after World War I. Another fan-type engine of this period was the REP of Robert Esnault-Pelterie, installed in an unsuccessful a irplane in 1907. His subsequent R E P fan-type engines were used in several successful airplanes. An outstanding engine to appear in 1909 was the 50-hp 7-cylinder G nome rotary-radial, first flown in Henri Fa...
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This document was uploaded on 01/19/2014.

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