STANDBY, TWO-INCH DIRECTIONAL INDICATOR AND COMPASS SYSTEM
PNEUMO DYNAMICS CORP GRAND RAPIDS MICH
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Work h s continued on a two-inc irectional indicator and compass system incorporating automatic magnetic slaving, directional gyro stabilization and automatic synchronizati n, and latitude compensation. Further tests on the centrifugal have shown that adequate gas pressure can be developed to produce a orque great enough to provide leveling rate of at least one degree per minute, four gas jets being utilized to level the rotor housing. Two test rotor as emblie have been fabricated and tested. It has been elected to proceed with a servo drive system for the compass dial display. The control transformer, differential and motor which will be used are shown. The fast synchroniz tion low l vi g nd latitude compensa ion system which consists of an amplifier a torqu motor, an l ctrically operated escapement mechanism, and a beat frequency oscillator system to gene te required timing pulses is discussed.