1944-01-01

Comparison of HYDRAULIC and ELECTRICAL ACCESSORY SYSTEMS in AIRCRAFT 440154

HYDRAULIC systems have the advantage of lighter weight, particularly in the higher horsepowers, when compared with electrical systems, although both systems should maintain their rightful places in aircraft, to be used where they can contribute most to the efficiency of the airplane as a whole.
These conclusions have been reached by the authors of this paper, after having made comparisons on the following bases:
  1. 1.
    A comparison of the individual components of each system on the basis of weight in pounds per horsepower at various horsepower ratings and at efficiencies that are commonly used in aircraft practice.
  2. 2.
    A comparison of typical hydraulic and electrical accessory power transmission systems designed to perform an identical job on a modern airplane.
This study has been confined to 28-v, d-c electrical systems and 1500-psi hydraulic systems.

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