Control Surface Rigging

Home Forums Maintenance of Grummans Control Surfaces Control Surface Rigging

Viewing 1 reply thread
  • Author
    Posts
    • #1622
      Roscoe Rosché
      Keymaster

      This is on a Tiger, but all of this could apply to the other variants of the line including the 2-seaters. The control surface deflects and limits will change, but the checking is straight forward.

      Elevator throw on the up limit was low at 17 degrees. Down was measured at 10. Owner reported no problems flying or controlling the plane. Started to adjust the elevator movement sand the up went fine, getting it to 24 degrees (23 +- 2 according to the TCDS). However the bottom would not move no matter what we did to the adjusting bolt.

      Back to square 1, grab the manual and put in the neutral jig in the control yoke. See picture of it in place (it is bright yellow).
      neutral jig in place small
      Noticed then that the elevator is not a neutral (or very near). So adjust the turnbuckles to get it to neutral and get the cable tension at 35 pounds ( 35 +0, -5). Now the up throw is still at 24 and the bottom is set at 16 (17 +- 2). On this plane with the turnbuckles as they were when found, the control yoke was hitting the firewall first.
      elevator not at neutral small

      elevator at neutral jig small

    • #9584
      Tim Hornyak
      Participant

      There has been some discussion on GG and GPA about rigging control surfaces on our aircraft. Here is the benefit of a properly rigged airplane; flying hands off at the top of the Green Arc with a lot of throttle remaining.

      Attachments:
      You must be logged in to view attached files.
Viewing 1 reply thread
  • You must be logged in to reply to this topic.