The improvement includes a unique indicator and associated circuitry for glide slope and localizer data. The device has a closed loop circuit with an optical position transducer therein. The circuit loop operates in conjunction with the received raw data from the glide slope and localizer transmitters to accurately locate a pointer (or indicator) controlled by a unique rotary solenoid actuator.
A circuit for use in aircraft navigation equipment includes operational amplifiers to drive a cockpit indicator such as an electric meter linearly over a first predetermined range, constantly over a second predetermined range, and out of view over a third predetermined range. A first operational amplifier circuit provides a linear drive to the indicator and a second operational amplifier circuit controls the constant drive current to the meter and defines first and second breakpoints which begin the constant in view and constant out of view responses, respectively. The circuit needs only a single input signal for operation.
A turn-and-bank indicator can integrate with regard to time the displacement of a pointer of the turn-and-bank indicator, the pointer indicating the turning rate of the airplane. It includes a non-contact converter which outputs an electrical signal in proportion to the deflection of the pointer; an amplifier which amplifies the output of the non-contact converter; an integrator which integrates the output of the amplifier with respect to time; and a digital display unit which displays the output from the integrator at a close position with the pointer.
