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Technical Paper

Flame Temperature Measurements-ELECTRONIC SOLUTION of the TEMPERATURE EQUATIONS

1947-01-01
470246
A NEW electronic circuit arrangement added to the electro-optical pyrometer developed at the University of Wisconsin indicates instantaneously the temperature in the combustion chamber of a diesel engine. The electronic device, which is described in this paper, solves an equation relating true temperature to intensity and wave length of monochromatic radiation from a luminous flame. True flame temperature is charted on an oscillograph as a function of such abscissas as time or crank angle. Several circuits are reviewed which were found unsuited for use with the pyrometer but which may be useful for other applications.
Technical Paper

Engine Trouble Shooting in the Air

1947-01-01
470251
THE engine analyzer described here utilizes the cathode ray tube and specially adapted circuits in a graphical indicator located at the flight engineer's station. It is designed as a permanently installed instrument for aircraft carrying a flight engineer or as plug-in test equipment for smaller planes. The analyzer is claimed to: 1. Increase aircraft utilization through the reduction of service time and expense. 2. Increase safety through knowing the conditions of engine operation, so that imminent failures can be anticipated during flight. 3. Increase knowledge about actual engine behavior during flight, so that more efficient operating methods can be used.
Technical Paper

BETTER PROPELLERS FOR LIGHT POCKETBOOKS

1947-01-01
470249
OPERATING characteristics of several propeller-engine combinations for private-owner type aircraft are reviewed to compare performance, weight, and cost. It is concluded that, for airplanes having low wing loading and high power loading, controllable-pitch propellers improve take-off and climb performance. However, weight and cost considerations favor the simpler automatic 2-position propellers. Planes with high wing loading and low power loading definitely need controllable-pitch propellers.
Technical Paper

SCUFF-AND WEAR-RESISTANT CHEMICAL COATINGS

1947-01-01
470250
PROPER protection of metal parts operating as bearing surfaces, or in contact under relatively heavy loads, during the break-in period often means the difference between successful operation and failure. Various surface coatings have been investigated to discover which ones will give this protection. The authors discuss here three types of surface treatment for cast-iron and steel that do give superior wear and scuff resistance.
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