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Portable testing apparatus for airplane engines

  • US 5,198,980 A
  • Filed: 11/05/1990
  • Issued: 03/30/1993
  • Est. Priority Date: 11/05/1990
  • Status: Expired due to Fees
First Claim
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1. A portable testing apparatus for monitoring the operating parameters of an aircraft reciprocating engine having cylinders, an intake manifold circuit, magnetos, and oil flowing through an oil pressure circuit and through an oil temperature port, the portable testing apparatus comprising:

  • a plurality of sensors detachably attached to the cylinders and to the oil temperature port to facilitate deployment of the testing apparatus and for sensing the temperature thereof and for generating analog temperature signals corresponding to the sensed temperature;

    a multiposition selector switch connected to each of said sensors, said selector switch being adapted for receiving and selecting one of said analog temperature signals so that indicia of said signals may be displayed singularly for ready analysis by an operator;

    a temperature indicating computer connected to said multiposition selector switch, said temperature indicating computer being adapted for converting said analog temperature signals into digital signals and for displaying said digital signals;

    a tachometer connected to the magnetos, said tachometer being adapted for measuring an operating speed of the engine;

    a manifold pressure gauge in communication with the intake manifold circuit, said manifold pressure gauge being adapted for measuring intake manifold pressure;

    an oil pressure gauge in communication with the oil pressure circuit, said oil pressure gauge being adapted for measuring oil pressure;

    an oil pressure switch in communication with the oil pressure circuit, said oil pressure switch being adapted to close when the engine develops oil pressure; and

    a rechargeable power supply means for providing the portable testing apparatus with a self-contained source of electrical energy so that said portable testing apparatus may monitor operating parameters of the engine.

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