Basic Considerations in Selection of Electric Systems for Large Aircraft

This paper presents some of the considerations involved in selecting electric systems for large aircraft. Such systems are undergoing intensive development now; consequently it is not possible to give complete answers to all problems which arise. Also, certain parts of the electric systems are subject to military classification and cannot be discussed. Nevertheless it is felt that many engineers, particularly those engaged in the design of such systems, will welcome a brief review of the basic factors involved. Industrial and central-station experience provide a valuable background for study of aircraft systems. However, too close an adherence to previous practice should not be maintained, since aircraft systems differ in many ways from those of land equipment. The need for minimum weight demands that only those features be included which fundamental considerations show to be necessary or which at least provide benefits that justify the weight involved.