Originally posted by AlkyIROC:
Originally I had a rod off the throttle pedal to an air cylinder attached to the linkage. I wanted to get away from the throttle rod and back to a cable system so I had to reconfigure the air cylinder so that when I hit the bump button, my throttle pedal could be at the floor and the engine still at an idle.
This is the system I fabricated. It took a little bit to figure out exactly how to get it set up but it works perfectly.
CO2 is always going to the cylinder to keep it retracted. Cylinder is connected to 1 bellcrank at the back which is controlled by the throttle cable at the bottom. When the CO2 is dumped, spring pressure pulls the butterflies closed. There is linkage on the other side joining the toilets together. When CO2 is put back into the cylinder, it snaps back into the retracted position and pulls both toilets back to WOT.
The hardest part was figuring out where to connect everything to get it to work. I was thinking of putting the air cylinder in place of the vertical rod but there just wasn't enough room.