Well, you know you need rudder pedals to perform coordinated turns, and differential braking. I used to have this solved with a Thrustmaster RCS (Figure 1), But in moving etc they got strayed, misplaced or stolen. Sometime in 2011 I came across this hot mess (Figure 2) using two (2) air cylinders cross plumbed, ensures device centered.
A good idea, bad implementation.
CH pedal internal
Athough the pedals are fixed (not good) the idea is brilliant. The other day while scrounging around at a local Goodwill store, I came up with a set of CH Products pedals (Figure 3). So here is the plan...
THE ANALYSIS: >The end unit should look somewhat like figure 1. That is one bar anchored in the center on a pivot. This has a mounting plate on either end mounted with a pivot. then the top can just be a rod that is also mounted on the plates and has a center pivot as well. This gives us the movement that we require for aircraft pedals.The CH pedals will be affixed to plates so the end results resembles Figure 1. The CH pedals cable only has 4 wires and will have to be replaced by a standard DB-25 cable that I have laying around. The unit will need 3 axis, two for brakes (one each pedal) and a center for the rudder
If you look at figure 4 you will see the pedal sits on a post coming up through from the base the pedal pivots on the white arm. This could be replaced with a hunk of Delrin® plastic or some soft brass. The two pivot points are a pair of sealed bearings. Figure 6 is a picture of the new kid on the block.
8/1/2015 In response to mcb1. Figures 7 and 8 are the real things from a Beechcraft. You will notice that each pedal is attached to a bar with an arm. You will also notice the brake cylinder mounted to pedal as well. this is for differential breaking. In Figure 9 you can clearly see them with the guts out of the way. You now can see clearly the yellow actuator arms. These would be connected to a clevis on the tail. So you now can use one pot or two. Now this is where you could mount the two air cylinders, connected to each other (Figure 2). The two air cylinders would keep the pedals centered, and aligned without the need for the second cross bars (Figures 1, 6). I have to work out the mechanics of this in CAD will get back.