SIGMA-TEK VACUUM DIRECTIONAL GYRO 4000C-9

Sigma-Tek Directional Gyro 4000C-9. A vacuum driven directional gyro by Sigma-Tek. The 4000C (52D54) 1U262-014-11 has an autopilot output for the Century llB and the Century lll systems. The Sigma-Tek Directional Gyro 4000C-9 is an air-driven directional gyro with A.C. autopilot pickoffs. Two knobs control the gyro. The left knob is used to cage the unit, and the right knob is used to select the instrument’s heading.
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