Word: condor
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...planning his quiet Condor, President Damon knew that 70% of airplane noise comes from the propellers after tip speed passes 850 ft. per second. He began by gearing down the Condor's three-bladed propellers so that at cruising speed, tip speed does not exceed 670 ft. per second. Next he insulated with rubber the nine attaching bolts of each Cyclone motor. He then proceeded to the problem of the fuselage...
With excitement at fever heat the French river steamer Condor was fired on from the left bank a few miles above Coblenz...
...strange drone grew out of the southern sky. The Yawalapiti children ceased playing. The adults stopped working and talking. The droning thing became visible very high up in the sky. It looked like a dragon fly. But it was bigger than a condor. The amazed Yawalapiti watched it circle down upon their village with a snarl louder than the snarl of any jaguar that ever lived...
Like all Fords, the big new plane is all-metal. Its wings spread no ft. From snout-like nose to ear-shaped rudder it measures 80 ft., the fuselage suggesting somewhat the flying-fish appearance of the Curtiss Condor. Inside each wing is built a 715-hp. Hispano-Suiza engine. The third engine, of 1,100 hp., is mounted atop the centre. Four passenger compartments are furnished with two standard Pullman sections each. A smoking compartment could accommodate additional passengers. There are two lavatories, a galley with gas stove...
...only partial value because as much as half the noise of an airplane is made by the whirling propeller (TIME, Oct. 27, 1930). But geared en- gines turn big, high-pitched propellers at low speeds. In such engines propeller noise is comparatively slight. Last week Eastern Air Transport, whose Condor biplanes are powered by geared Conqueror engines, adopted a muffler which was said to reduce engine noise by 70% without loss of power. The muffler, developed by the company's Chief Engineer Ralph G. Lockwood, consists of an exhaust manifold more than twice the size of the regular type, inside...