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A Method of Measuring Piston Temperatures

出版	National Advisory Committee for Aeronautics, 1940
URL	http://books.google.com.hk/books?id=m_hyHAAACAAJ&hl=&source=gbs_api

註釋A method that makes use of thermocouples has been developed to measure the temperatures of engine pistons operating at high speeds. The thermocouples installed on the moving piston are connected with a potentiometer outside the engine by means of pneumatically operated plungers, which make contact with the piston thermocouples for about 10 crankshaft degrees at the bottom of the piston stroke. The equipment is operated satisfactorily at engine speeds of 2,400 rpm and shows promise of successful operation at higher engine speeds.