Jump to content

Trim Wheel Moves Nose Nown In Flight


Recommended Posts

Gents, I've searched and gone through a few old threads about trim being stuck or difficult to move but I have the opposite problem. After trimming for level flight I can occasionally watch the trim wheel rotate slowly to a nose down position. The picture below was revised in '66 but I have a '62. My trim assembly does NOT have the 4 nuts to loosen or the two vertical bolts that could be used to tighten the chain. The box is riveted together as one assembly with no obvious adjustment possible. The trim jack screw assembly in the tail was rebuilt by Lasar a few years ago and I'm not sure what else to check. Any advice is appreciated.

Here's one like mine on Ebay: https://www.ebay.com/i/142987801229?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=142987801229&targetid=888709244052&device=c&mktype=pla&googleloc=9016915&poi=&campaignid=9426322072&mkgroupid=92907997622&rlsatarget=pla-888709244052&abcId=1141016&merchantid=109942766&gclid=Cj0KCQjw-_j1BRDkARIsAJcfmTEaArjSv6EOodQCbl-G13VkGz34Dku7hXeMPnFWQPmZHvFCAUGYBEkaArSaEALw_wcB

And this one is more like the picture: https://www.ebay.com/i/274312169564?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=274312169564&targetid=882497019982&device=c&mktype=pla&googleloc=9016915&poi=&campaignid=9248481111&mkgroupid=93538209803&rlsatarget=pla-882497019982&abcId=1141156&merchantid=138359445&gclid=Cj0KCQjw-_j1BRDkARIsAJcfmTEsDtjP10Piip0c9IOwNxPT5QOUzX71MVk7ki4GE55FXUblIiAzW5UaAvwVEALw_wcB

Trim.PNG

Link to comment
Share on other sites

7 minutes ago, M20Doc said:

The foot note on the left says to adjust the eccentric bushing to tighten the chain.

Clarence

 

I did see that and should have mentioned it, but upon visual inspection the eccentric is riveted in place. No six screws around shaft. Suppose we could drill it out, rotate, drill a new hole and rivet again but it's gonna be really hard to get it in the right place on the first try. I'll try to get some pictures with the cover off when I'm at the airport tomorrow.

Link to comment
Share on other sites

6 hours ago, takair said:

You need anti-lube.  A slurry of peanut-butter, old grease and dust..  ;)

Being oil based, peanut butter and old grease is the wrong base.  I'd use some  3M fabric adhesive as the base, with some tank sealant and very fine sand. :P  Apply quickly.

  • Haha 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.