Before I can get the VPForce-based control loading system installed in the F-15, I needed to build a cable that connects the SFS wiring harness in the cockpit to something that can read the switch inputs from the grip. In this case, that device is the VPForce Shift Register board.

VPForce Shift Register Board

It’s a lot smaller than I expected. 🙂

The SFS (Stick Force Sensor) box is where the flight grip is mounted. It has a post that bolts to the flight stick base in the cockpit. In a real SFS box, the grips mating plug is part of an assembly that contains a load cell. This is where the “Force Sensor” part comes into play.

Location of the load cell & mating connector

You can see how I built the SFS for this project at this blog entry: https://www.f15sim.com/?p=272

Here’s the video I made that shows how the new SFS interconnect cable was made, and where it was installed. https://www.youtube.com/watch?v=8fHs_51rHa8

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