Other

Robert H Murashige

James U Lemke

Gilbert E Kammerer

In present day propeller driven aircraft, the engine is mounted on slightly resilient engine mounts which in turn are secured to the aircraft fuselage. Under propeller rotation, the developed thrust causes the engine housing to move slightly forward relative to the fuselage due to the resiliency of the mounts. The amplitude of the engine displacement is directly proportional to the magnitude of the thrust, and the present invention measures this displacement and converts it to an indicated value of thrust. A displacement or force balance transducer, remote from the engine proper, is mounted behind the engine on the engine compartment firewall. A dimensionally stable compliant tensile member such as a steel cable having one end bolted to the engine housing and the other end connected to the spring loaded moveable core of the transducer transmits the engine displacement to the transducer. Securing the cable to an existing stud on the engine housing is a simple mechanical connection, and requires no modification to the engine itself.

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Carlsbad, CA, United States of America

Robert H Murashige