4000H Bootstrap Directional Gyro4000H-series XYZ Bootstrap Directional Gyroscopes

Sigma Tek's Directional Gyro with heading synchro output provides a cost effective link to "bootstrap" other instruments requiring heading information for: display orientation to aircraft heading, heading stabilization functions, and other navigational calculations and/or solutions. Specific applications include: Argus Moving Map Display®, L-3 Avionics Stormscope®, and Insight Strike Finder®.

The heading output exactly tracks the aircraft heading as depicted under the index pointer on the Directional Gyro. The synchro index and rotation reference is set to ARINC characteristics. The 26 VAC, 400 HZ heading synchro requires a readily available external excitation, preferable from the instrument/system receiving the heading output or from an independent inverter.

Sigma Tek's Directional "Bootstrap" gyro includes options for lighting and interfaces for ARC, Century Flight System, and S-Tec autopilots.

  • Options
  • Specifications
  • Compatibility
4000H Bootstrap Options

The Bootstrap gyros offer cost-effective ways for adding heading syncro information for systems such as: Moving Map Displays, Storm Scopes, Insight Strikefinder, and various Auto-Pilot interface options.

Part Number Model Autopilot
@ 30º
@ 90º
(see note)
1U262-031-1 4000H None Orange White X X
1U262-032-2 4000H-1 None Orange White X  
1U262-033-3 4000H-2 ARC Orange White X X
1U262-034-4 4000H-3 ARC Orange White X  
1U262-033-5 4000H-4 S-TEC Orange White X X
1U262-034-6 4000H-5 S-TEC Orange White X  
1U262-035-7 4000H-6 CFS Orange White X X
1U262-036-8 4000H-7 CFS Orange White X  
1U262-039-11 4000H-10 KING (DC) Orange White X X
1U262-040-12 4000H-11 KING (DC) Orange White X  
The following gyros are ARINC-style:
1U262-037-9 4000H-8 CFS (DC) Orange White X X
1U262-038-10 4000H-9 CFS (DC) Orange White X  

Note: Lighted instruments do not include lamp trays, please specify aircraft voltage:

BA14-24-BW3G (14 Volt Lamp Tray)

BA28-24-BW3G (28 Volt Lamp Tray)