Jet engine test set

Abstract

The present test apparatus is connected to a jet engine to perform a large number of tests of the mode of operation of the jet engine on both a static and dynamic basis. The multifunctional tester includes four sets of numerical displays on the face of the instrument. The first of these displays shows a sequence number and represents the specific test sequence which is being undertaken by the test apparatus at a particular time. An advance switch is provided to advance to the desired test sequence; and the initiate switch which starts the displayed test sequence. Both the advance switch and the initiate switch have indicator lights associated with them indicating that the test apparatus is ready either to have the sequence advanced, or to initiate a test represented by the sequence number. Input switches are also provided on the face of the test instrument for entering the trim RPM for the particular jet engine under test. Inputs to the multifunctional test apparatus include various jet engine temperatures, jet engine rotational speeds, the guide vane angle, and certain fuel limiting amplifier parameters. Predetermined limits for the test results for various static and dynamic tests are stored in the test apparatus, and when the test results do not fall within the limits, the display with the test results which are out of limits, is flashed.