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Sigma Tek 4000HR Directional Gyro, Air, With Heading Reference Bug

Sigma Tek 4000HR Directional Gyro, Air, With Heading Reference Bug

Brand: Sigma-Tek

Product Code: 4000HR
Availability: Call For Availability

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Sigma Tek 4000HR Directional Gyro, Air, With Heading Reference Bug

 

The 4000B is a standard air-driven, non autopilot, directional gyro.
 
This standard configuration gyro can replace most air-driven gyros with the major difference being in the layout, display colours and a heading reference (or reminder) bug.
It is a 3” instrument, constructed upon a rigid, cast-aluminum frame that houses a precisely machined brass rotor, which is suspended on high-quality, long-lasting bearings.
 
Operation: As the aircraft turns left or right, gears on the sensing unit and dial shaft translate this rotation into rotation of the instrument’s vertical dial. Left turns produce clockwise dial rotation and right turns produce counter-clockwise rotation. The gyro is controlled by a heading selector knob located on the lower left of the instrument. Pressing and turning the knob first disengages the dial shaft and then resets the dial to a new heading, which results in a new course indication. Releasing the selector knob re-engages the dial shaft. The on-course position of the pointer is always at the top of the azimuth circle (0° on the dial with the aircraft headed north).
 
Heading Bug: Many pilots find the heading reminder a valuable feature whenever the cockpit is busy, such as during an approach with heavy ATC traffic. Setting a new heading during a long, cross-country flight eliminates the tedious math associated with frequent navigational crosschecks. A quick glance at the instrument instantly reminds the pilot of his heading. The heading bug can be positioned anywhere around the heading card by turning the right knob.
 
Basic Specifications:
  • Height: 3.25"
  • Width: 3.38"
  • Depth: 6.68" (max)
  • Weight: 2.4 lbs. (max)

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