Welcome! Becoming a registered user of ShortWingPipers.Org is free and easy! Click the "Register" link found in the upper right hand corner of this screen. It's easy and you can then join the fun posting and learning about Short Wing Pipers!

Thanks Thanks:  0
Results 1 to 10 of 10

Thread: Elevator trim

  1. #1

    Join Date
    Jun 2012
    Posts
    76
    Post Thanks / Like

    Default Elevator trim

    Flying my tripacer today with my instructor and on final with flaps in and a little back pressure, started to trim and the trim became very stiff, but after landing it worked fine and i could not see anything obviously wrong. has anyone else had this experience? any ideas?

    thanks

  2. #2
    Gilbert Pierce's Avatar
    Join Date
    Nov 2007
    Location
    Germantown, Tennessee 01TN
    Posts
    3,128
    Post Thanks / Like

    Default Re: Elevator trim

    air load and lack of lubricant

  3. #3

    Join Date
    Dec 2015
    Posts
    398
    Post Thanks / Like

    Default Re: Elevator trim

    Unzip your headliner next to the trim handle pully and as you turn the crank with one hand put pressure on the cable as it enters the pully with other hand.

  4. #4
    Administrator Steve Pierce's Avatar
    Join Date
    Nov 2007
    Location
    Graham, Texas, United States
    Posts
    12,110
    Post Thanks / Like
    Blog Entries
    1

    Default Re: Elevator trim

    I would make sure you don't have any congealed grease in the jackscrew threads, If you do clean it out and lubricate running the trim through it's full range.

  5. #5
    Gilbert Pierce's Avatar
    Join Date
    Nov 2007
    Location
    Germantown, Tennessee 01TN
    Posts
    3,128
    Post Thanks / Like

    Default Re: Elevator trim

    Quote Originally Posted by SMO22 View Post
    Unzip your headliner next to the trim handle pully and as you turn the crank with one hand put pressure on the cable as it enters the pully with other hand.
    I don't think that is the problem as He didn’t say anything about it slipping .
    Last edited by Gilbert Pierce; 05-08-2019 at 11:32 AM.

  6. #6

    Join Date
    Oct 2013
    Location
    northern Illinois
    Posts
    243
    Post Thanks / Like

    Default Re: Elevator trim

    if for some reason you were trimming different than your norm, I would say dirty jack screw. run it its full travel on the ground. If you know its clean I would side with Gilbert

  7. #7
    mmoyle's Avatar
    Join Date
    Mar 2013
    Location
    Platinum Alaska
    Posts
    2,015
    Post Thanks / Like

    Default Elevator trim

    The pin that holds the trim handle can work itís way out causing it to feel stiff or prevent you from turning the handle. Found that once on Marvís trim system. The pin starts life as a straight or slightly curved 1/8Ē or so diameter pin. When itís driven into the handle and shaft it deforms forms to an arc...the pin worked loose on Marvís Pacer...straightened it a bit..then installed with a dab of bearing lock from loctite. I used a stretching body hammer (used to thin the metal to crate a curve) to back up the assembly while I drove in the pin with a roll pin punch...third hand needed to eliminate bending or damaging the assembly when driving in that pin.


    Sent from my iPad using Tapatalk Pro
    Last edited by mmoyle; 05-08-2019 at 05:54 PM.

  8. #8

    Join Date
    Dec 2015
    Posts
    398
    Post Thanks / Like

    Default Re: Elevator trim

    May want to also confirm the yoke is up not down, not sure it matters though, read here it works fine right or upsidedown

  9. #9
    Stephen's Avatar
    Join Date
    Nov 2007
    Location
    Lopez Island, WA
    Posts
    3,230
    Post Thanks / Like

    Default Re: Elevator trim

    I clean the jack screw at annual and lube the pulleys. That always makes it runs smoother.
    "You can only tie the record for flying low."

  10. #10
    DrHook3960's Avatar
    Join Date
    Jun 2015
    Location
    Southern Maryland
    Posts
    94
    Post Thanks / Like

    Default Re: Elevator trim

    Check out the wear on this one from my current project,20160521_124715.jpg

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •