Abstract: A fuel gauge damper circuit takes a variable resistance signal from a fuel tank sending unit, develops an input voltage proportional to the variable resistance and generates a filtered average of the input voltage at the fuel gauge damper output. The circuit damps undesirable large swings in the input voltage caused by "sloshing" in the fuel tank. Additionally, the damper circuit features power-up initialization apparatus for eliminating erroneous gauge indications which would otherwise occur upon the initiation of vehicle engine cranking. Also, a return to zero circuit is provided which drives the fuel gauge to zero after the engine is turned off in order to begin the gauge operation from zero when the engine is turned on.

Abstract: A fuel gauge damper circuit takes a variable resistance signal from a fuel tank sending unit, develops an input voltage proportional to the variable resistance and generates a filtered average of the input voltage at the fuel gauge output. The circuit damps undesirable large swings in the input voltage caused by "sloshing" in the fuel tank. Additionally, the damper circuit features power-up initialization apparatus for eliminating erroneous gauge indications which would otherwise occur upon the initiation of vehicle engine cranking.

Abstract: In a helicopter, torque display for a main rotor mast is mounted and connected to be driven from a power source at its base and connected to a main rotor at its tip. A reference member secured inside the main mast at the tip thereof depends freely and extends coaxially the length of the mast to a point adjacent the base thereof. A separate index is carried by the reference member adjacent to the base and by the main rotor mast adjacent to its base. A pick-off senses rotational movement of one index relative to the other and provides for actuation of a torque indicator for the pilot of the helicopter.