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Show Cooling of Engine Problem of Builders Detroit. "Air-cooled versus water-cooled" water-cooled" remains the outstanding con- troversy among aircraft engine builders. build-ers. Recent performances and experiments experi-ments have done little to resolve a definite answer to the question. Rath, er, they have merely Intensified the discussion. It seems Inevitable that eventually aircraft designing must he standardized standard-ized around cither tbe engine which is cooled by water or by air. All of the spectacular ocean flights and. In fact, all aviation feats which contributed contrib-uted to the awakening of public Interest In-terest In aviation, which began In 1027, were made with ulr-cooled motors. mo-tors. The argument was advanced that this performance Justified specialization specializa-tion in the radial air-cooled type of motor to the exclusion of other designs. de-signs. It was asserted that It was wasted effort to carry water Into the air to reduce engine hent when the air flowing around the plane In flight would serve that purpose. Hut when aircraft bulldera began seeking greater speeds, the radial type with Its enormous frontal resistance, lost some favor, and designers began discussing the p ssibilltles of water-cooled water-cooled types. A method of chemical cooling brought forward and tried by the United States army, has met with j favorable results In preliminary tests. |