| Make | Sigma |
|---|---|
| Model | Directional Gyro – -Tek |
| Condition | Used |
| Location | Langhorne, PA , US |
| Date Listed | Aug 5, 2026 |
| Expires | Sep 4, 2026 |
Description
Sigma Directional Gyro – -Tek — $650.
Specs
- Make / Model: Sigma Directional Gyro – -Tek
- Condition: Used
- Location: Langhorne, PA
Summary
DDirectional Gyro – Sigma-Tek / Cessna Style DGP/N: 4000C-15 (S3330-2 / 1U262 series) | Aircraft Heading Indicator / Autopilot DG. Genuine aviation directional gyro used in a wide range of general aviation aircraft.
Description
DDirectional Gyro – Sigma-Tek / Cessna Style DGP/N: 4000C-15 (S3330-2 / 1U262 series) | Aircraft Heading Indicator / Autopilot DG
Genuine aviation directional gyro used in a wide range of general aviation aircraft. The 4000C-15 series is a proven mechanical heading reference instrument commonly integrated with autopilot systems and traditional “six-pack” cockpit layouts.
Specifications:• Type: Directional Gyro (DG) / Heading Indicator• Model: 4000C-15• Manufacturer Series: Sigma-Tek / Cessna-compatible• Part Number: S3330-2 / 1U262-042 / 1U262-004 series (variant dependent)• Function: Aircraft heading reference for pilot and autopilot systems• Display: 360° rotating compass card with heading bug• System Compatibility: Autopilot-coupled DG systems (Century, S-Tec, King compatible installations)• Mounting: Standard 3-1/8” instrument panel form factor
Physical / Performance Specs:• Approx. Weight: ~2.5 lbs• Size: 3-1/8” standard instrument housing• Power: Aircraft vacuum or electric-driven system (configuration dependent)• Operating Range: Certified for typical GA flight envelopes (up to ~40,000 ft depending on installation)• Construction: Precision gyroscopic rotor with shock-mounted housing
Features: Reliable mechanical heading reference Autopilot-compatible directional output Caged / uncaged heading control knob Smooth azimuth rotation for stable heading indication Standard panel-mounted aviation instrument
Condition:Used / removed from serviceCosmetic condition as picturedSold as-is — buyer responsible for verifying overhaul status and airworthiness for intended installation.
Ideal For:• Aircraft panel restoration• DG replacement or backup instrument• Autopilot system integration• Experimental / certified aircraft builds (as applicable)• Avionics shops and spare inventory
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