Switches

EL3D has a number of working switches that control various functions. 

This bank of switches is located in the bottom control panel just above the DSKY. Dead Band Roll Mode Control Pitch Mode Control Yaw Mode Control PGNS

• PGNS Primary Guidance and Navigation System.
• This is a three position switch:
• Auto  PGNS totally controls the spacecraft. 
• Att Hold  PGNS issues commands to RCS that correspond to the deflection of the controller.  The deflection of the controller corresponds to a rate command about the desired axis.  RCS calculates the necessary fire times of the jets and tries to match the actual rate with the desired rate.  Moving the controller back to the center effectively issues the command for zero rate and RCS fires to stop the rotation.  Once the rotation has stopped within limits of the Deadband switch settings, PGNS holds that attitude within the Deadband limit.
• Off  No navigation or RCS activity is calculated.

• Dead Band

  • This is a two position switch:

    • Max for less precision

    • Min for more precision

     

• Roll, Yaw and Pitch Mode Controls

  • These are three position switches

    • Up  position for PGNS automatic operation

    • Pulse  to operate in  'free' mode.  Deflection of the controller fires the jet continuously.

    • Off   No operation

 

 

---

This bank of switches is located just underneath the FDAI ball. Rate Scale Throttle Control