SIGMA-TEK VACUUM DIRECTIONAL GYRO 4000C

Sigma-Tek Autopilot Directional Gyro 4000C. A vacuum driven directional gyro 1U262-003-14 by Sigma-Tek. The 4000C (52D54) has an autopilot output for the Century llB and the Century lll systems. The Sigma-Tek Autopilot Directional Gyro 4000C is an 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. The 4000C has a 52D54 display, with optional lighting for this specific model.