How to modify your USB game controller for RC flight simulator use
Some flight sims, e.g. FMS, will work with computer game "pad" type controllers that have a USB connector. An example is the Logitech Dual Axis Pad controller, available for about $20 at Fry's electronics.
Click on the thumbnail for larger image:
Unfortunately for our purposes, both sticks are self-centering with springs. We would like the throttle control (left stick forwards and backwards) to not center after being moved, i.e. stay at the throttle position set (this is how a real RC airplane transmitter works). The controller can be used as-purchased, but you can easily modify it for a more realistic feel. Please note that these mods will most definitely void your warranty, so proceed at your own risk!
First, turn the controller over, and use a small Philips head screwdriver to unscrew the seven (7) screws holding the case together:
After lifting the top of, you should see something like this:
Note that some of the "button" parts will fall out at this point. Keep them someplace safe. Now flip the unit over again, and unscrew the lone screw at the bottom of the left control stick. This allows you to pull that control module clear of the bottom half of the case. Note that there are wires attached to it, so don't yank it out hard! Just pull it gently clear.
With the left stick unit clear of the box, you will need to drill into the plastic case housing the stick, as shown below. The idea is to destroy the hard plastic stop that the spring uses. Without the stop, the spring cannot re-center. If you can somehow open the control box and remove the spring, be my guest; I could not find an easy way to open the little box, so out came the drill!
Here is a close-up showing the spring and the hole that was drilled:
Now re-assemble the control unit. I put all the buttons back, but the sticks would probably work without the buttons. Here you can see that now when you throttle back, the throttle stick remains in the "low" position and does not re-center.
That's it! You now have a USB controller for RC
flight simulators that support USB. Combined with the free FMS software,
this is a good low budget solution to enjoy the benefits of RC flight
simulators.