Trutrak Roll Servo Interference

jeffmoreau · #1 05-05-2009, 06:26 PM

I am having an issue with my Trutrak roll servo hitting one of the braces on the underside of my front floor/footwell.
Has anyone ran into this? I installed the servo according to the drawing supplied with the unit. I am most concerned as I aware of how important to have the controls free and correct.
Any photos or advice as to how you solved this problem. I know that this floor must flex as you sit on the front seat.
I am afraid that even if I cut some of the floor stiffener away that the floor may still flex and touch the control arm of the servo and then bind the controls.
Please help me.

RV7Guy · #2 05-05-2009, 07:06 PM

I'll see if I can find the pictures. I had to move the servo back some to get clearance. I also bent the arm inward (toward the servo) approx. 10 degrees.

It took a little playing around, but I got it to work. No problems with 400+ hours.

jeffmoreau · #3 05-05-2009, 07:23 PM

A few pictures would be really helpful.

Ironflight · #4 05-05-2009, 08:07 PM

Looks like Jeff is building an -8A, and Darwin, yours is a 7 - right? Having both a -6 and an -8 in our hangar, I can tell you that two installations are worlds apart!

Here's a picture from my pile of construction photos - both the trim and autopilot servos are mounted per their respective drawings.

Paul

chrispratt · #5 05-05-2009, 08:23 PM

Jeff:

I had the exact problem on my -8. I couldn't believe it when I went to install the floor panel and discovered the interference. I checked the instructions and drawings and of course there is no indication of any such problem. Makes me suspect TT has never actually installed this in an -8 themselves.

At any rate, I cut the floor stiffener down as close as I could to the bend in the flange and far enough inboard to clear any motion by the servo arm. I've been flying with it for almost two years and have not noticed any binding or other problems. You won't depress the floor that much, after all there is a stiffener in place (though a little less stiff than before).

Sorry I don't have photos, but 5 minutes with Dremel and a file and you'll be good to go.

Chris

pauldan181 · #6 05-05-2009, 09:30 PM

I just drilled off the angle and turned it around. It now clears the servo arm by about a half inch. No photo of the floor but here's the servo mounted.

Good luck

Paul Danclovic
Jamestown NC
RV-8A N181SB

Craig23 · #7 05-05-2009, 11:12 PM

Which of the three holes in the servo arm did you all mount the pushrod to? I have cut some of my floor stiffener away, but I guess I will have to keep cutting since I'm still getting some interference.

jeffmoreau · #8 05-06-2009, 08:11 AM

Ihave it installed on the outermost hole.

jeffmoreau · #9 05-06-2009, 08:13 AM

Quote:

Originally Posted by Ironflight

Looks like Jeff is building an -8A, and Darwin, yours is a 7 - right? Having both a -6 and an -8 in our hangar, I can tell you that two installations are worlds apart!

Here's a picture from my pile of construction photos - both the trim and autopilot servos are mounted per their respective drawings.

Paul

Paul,
Thanks for the reply. Did you have any issues? Mine is in the exact same place.

RV7Guy · #10 05-06-2009, 09:07 AM

Good catch Paul. Disregard my comments!! I guess I had just woke up from a nap.