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Thread: Q on tail post sleeve for pa-22/20

  1. #11
    Administrator Steve Pierce's Avatar
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    Default Re: how nuch slop in tailpost where fin slides in ?

    I am not sure about how much play but if you look at the fuselage drawing it will give you the tube size of the tail post and the fin drawing will give that tube size which will give you the interference.

  2. #12
    Administrator Steve Pierce's Avatar
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    Default Re: how nuch slop in tailpost where fin slides in ?

    Quote Originally Posted by violinmaker View Post
    Now that Ive gotten the fin out of the tailpost and examined it--- (and cleaned it some) the fin post slides down in there much easier than it did.
    I can wiggle it a little bit now-- where I couldnt before. How much slack there is permissible ? I am tossing around the idea of putting in a new tailpost
    --- partly so I can sleeve it to my liking--- but I will keep this one if it doesnt look too bad inside-
    I thought I could put a 12 ga. shotgun brish in the drill and run it down in there to clean the inner surface to better make a fair judgement of the interior condition. Looks like putting in a new tailpost would be a pretty good chunk of delicate work -- but I could do it .

    How much "wiggle" is tollerable in the fin at the rear socket--- ?

    Tim
    Tim, I moved this new thread to your thread on the stuck vertical stab. I figured they go hand in hand and would be easier for someone to find all this information in one place. One of my goals here is to make subjects easily searchable for generations to come so that the can benifit from the knowledge shared here.

  3. #13

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    Default Re: Q on tail post sleeve for pa-22/20

    Gotcga ya-- thanks----
    Do you mean the piper drawings CD ? For some reason I didnt think to look there.

    I had an idea/observation I will throw out later today about how to do a top-down fin post sleeve job. (throw out for opinions/feedback)
    Thought I might describe it to clyde smith and also see if he thinks it would be good. (assuming I don't do a "full amputate" mine.... )
    Tim

  4. #14

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    Default idea for top-down tail post sleeve

    Noticed that my 22/20 has a short sleeve at the bottom-- comes up just a little above the old spring hole (which never got patched-)
    Not sure if that was put in during the conversion or was a 22 leftover.

    Just thinking-- if I was to simply drive a sleeve inside the existing post- it would bottom out against that short sleeve. And that junction would be
    very close to where they crack across the hole. Seems like this geometry would force all the movement from the tailwheel stress to work the outer
    tube at that junction - which would seem to only make the problem worse by forcing all the action to that small confined area.

    Im thinking a better idea would be to use the same general type of inner sleeve-- but insert into the end of that sleeve a shorter sleeve which would
    fit snugly inside the short bushing at the bottom of the tail post. That piece could run all the way to the bottom and even stick out of the short


    bushing that is there now. That way when the tail post is flexed from the leaf spring-- it cant distort at the junction between my long sleeve and the
    short pre-existing short sleeve. (the short one may be there to beef up the cross hole for the Paa-22 skid ????)

    I can see some weld melt through at the upper longerons that I will have to smooth /grind out in order that a sleeve will go all the way down. May be
    able to clear that up using a 3/4 inch stone on a long stem.

    Thought I's throw this out for engineering type comments and feedback...
    If I can measure the ID of that short bottom sleeve- I could make my sleeve out of the same material so that the ID's of both would match-
    and the internal connector would fit both snugly.

    Tim
    Last edited by violinmaker; 06-13-2019 at 08:17 PM.

  5. #15

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    Default Re: idea for top-down tail post sleeve

    can someone tell me how to "delete" ??

    The "edit" button says "edit/delete" when you hover over it--- but after you click it--- I cant find a delete button …… can you give me a hint ?

  6. #16
    Jim's Avatar
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    Default Re: idea for top-down tail post sleeve

    Hi Tim,

    Might be dependent on what you have, but here I click on edit then along the bottom right in that box there are several options. Steve could help out if you don't have Save, Go Advanced, Delete, Cancel where you can option their use.
    EAA Technical Counselor #4562
    Experimental Aircraft Association #140897 (1977)

  7. #17
    Administrator Steve Pierce's Avatar
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    Default Re: Q on tail post sleeve for pa-22/20

    I merged them.

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