I had similar issues with my tailplanes. TP5 and TP6 were a perfect fit on
the torque tube prior to hacksaw grooves being made for bonding. The
stresses induced by only very shallow grooves took one out of round and
caused it to jam up on the torque tube. Europa replaced the bush for me and
interestingly it was supplied very slightly oversize.
If yours is the accelarated kit, you have no control over how it was
produced. If the main stabilator layups were done without the torque
tube in place and therefore maintaining the TP5 and 6 bushes in alignment,
any minor stresses incurred when bonding the assembly to the workbench could
have resulted in a misalignment in the bushes - if this is the case, the
only cure I could imagine would be to remove the inboard bush and reset with
the torque tube in place and effect a repair to the glasswork - tiresome to
say the least.
One other point - a number of builders have commented that their TP12 drive
pins are a very tight fit - they should slide into the bushes without any
resistance at all. Any tightness here is almost certainly because the drive
pins were not accurately aligned with the torque tube prior to bonding in
the TP13 bushes. You can oil them to your heart's content - it won't make
any difference since you are trying to withdraw the pins in a direction
parallel to the torque tube to which they are not lined up! ! If this is
the case - heat up and remove the bushes - realign ACCURATELY your drive
pins with the torque tube and then rebond in the bushes so that they are a
smooth sliding fit with NO resistance - their axes should now be exactly
parallel to the torque tube. Accurate alignment here will not only produce a
nice sliding fit but will prevent wear and a gradual increase in slop
between the stabilators!
XS 497
----- Original Message -----
From: "Roger Mills" <Roger.Mills@btinternet.com>
Subject: RE: Europa-List: Tailplane issue?
<Roger.Mills@btinternet.com>
>
> Paul,
> I had a similar problem which I found to be due to slight mis-alignment
> of the TP12? drive pins with the TP13? sockets - it doesn't take much to
> produce the symptoms you describe. The fact that things tighten up in
> the last 5mm is the clue!
>
> Check the alignment of the pins by pushing some tightly fitting tube
> over them and sighting against the toque tube and socket positions on
> the tailplane. You may need to judiciously tweak the pin alignment and
> ensure the TP13 sockets are greased properly - but, whatever, you should
> not be using heavy handed forces in assembly or disassembly.
>
> Roger Mills
> G-BVUV
>
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] On Behalf Of Paul
> McAllister
> To: europa-list@matronics.com
> Subject: Re: Europa-List: Tailplane issue?
>
>
> --> <paul.mcallister@qia.net>
>
> Hi all,
>
> I am interested in anyone's experience with tight tail planes. The
> problem I am having is the tail planes fit snuggly until the last 5mm
> and them need to be pushed home hard. The only way I can get them off
> is to pry them off with a screw driver which doesn't do the paint much
> good. I'd like some idea on what I can to improve the situation.
>
> Paul
>
>
> direct advertising on the Matronics Forums.
>
>
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