Abstract: A monitoring system (10) for measuring fuel consumption of an engine having a supply tank and an input fuel line extending between the supply tank and the engine is provided. Structure (12, 14) is disposed within the input fuel line for measuring the fuel flow rate of fuel flowing from the supply tank to the engine and for generating an output digital pulse stream proportional to the fuel flow rate. Circuitry (56, 58) is provided for generating a signal representing an initial amount of fuel stored in the supply tank. An electronic processor (18) is responsive to the digital pulse stream and the signal representing the initial amount of fuel for generating an output signal representing the fuel consumption rate of the engine. A display (50) is interconnected to the electronic processor (18) for displaying the electronic processor output signal representing the fuel consumption rate of the engine, fuel status and other measured parameters.

Abstract: The specification discloses a temperature monitoring system for monitoring thermal operating characteristics of aircraft engines. The system includes a plurality of temperature sensors located in different temperature monitoring zones within the aircraft engine to produce electrical sensor output signals proportional to the temperature of the corresponding zones. The temperature monitoring system further includes circuitry for automatically and sequentially scanning the sensor output signals. An electronic processor generates temperature difference signals representing the temperature difference between the hottest and coldest scanned sensor output signals. A visual display displays the generated temperature difference signal, the number of the temperature monitoring zone being monitored and the temperature of the hottest temperature monitoring zone. The system thus enables the aircraft operator to accurately and quickly observe the thermal operating characteristics of the aircraft's engine.