AIRBORNE FUEL GAGGING SYSTEM WITH TEMPERATURE COMPENSATION Russian patent published in 2002 - IPC

FIELD: aircraft instrumentation engineering; measuring amount of fuel on board of maneuverable aircraft. SUBSTANCE: proposed system is equipped with sensors, meters and indicators showing parameters of fuel contained in aircraft tanks. First sequence fuel tank suspension and release indicators are founds in external tanks. Fuel flow sensors and temperature gauges are fitted in series mains of second sequence fuel tanks - in wing tanks. Refueling flow sensor and temperature gage are mounted in filling main of wing tank. Fuel level sensors and temperature gages are mounted in third sequence tanks-in fuselage tanks. Proposed system is also provided with information processing units: first second and third fuel capacity computers, first and second comparison units, numerical set point unit and indicator. Three computer are provided with service inputs for reception of information pertaining to specified density of fuel, amplifier and service input for entering information pertaining to geometric characteristics of fuselage tanks. Second computer is provided with input for entering information on amount of fuel received before flight. Numerical set point unit has input for information on numbers of tanks and masses of fuel contained in each tank. Fuel density temperature compensator is used for correction of error of mass of fuel in operation of aircraft on basis of fuel temperature gage. EFFECT: enhanced accuracy of measurement of aircraft fuel capacity at space evolution and g-loads, as well as during in-flight refueling. 4 cl, 1 dwg