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Previously this group reported on the testing of salt-fog penetration and the failure, in heat endurance tests of varnished insulation, that is, on Coated fabrics and paper. The tests were based upon the use of the electrographic printing method which, has been described in the 1948 Annual Report of the Conference. The present paper is a progress report. It shows the application of the test method...
Actual defects, as well as areas of low resistance to the penetration of moisture, can be detected on coated insulating materials; and the spreading of these areas can be recorded by a modification of the electrographic printing method.
A method is proposed for determining the current capacity and the temperature of operation of cables in airplanes. The cable selected should in combination with the power plant result in the smallest weight for each electrical unit converted into useful work. A general equation is given for selecting the optimum current which is expressed in terms of the weight of the cable, power plant, and fuel;...
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