Graham,
I agree that they loosen up on repeated fitment, yet I had taken great care
to minimise this during the build (fitting back together only twice, less
than which was not possible).
As such, unless marginally oversize pins are supplied for the final fitting,
the design is invalidated by the build process.
Duncan McF.
----- Original Message -----
From: "Graham Singleton" <grahamsingleton@btinternet.com>
Sent: Sunday, June 24, 2007 1:12 PM
Subject: Re: Europa-List: Tailplane flutter
> <grahamsingleton@btinternet.com>
>
> Duncan
> I think they always were supplied as an interference fit.
> I've noticed, however, that once they have been in and out more than once
> they loosen up. Pushing a drill through to drill the nylon bush is an
> awful thing to do to an accurate hole.
>
> Better way might be to supply the nylon bush pre drilled, then bond in the
> bronze bushes to fit the position of the nylon instead of the other way
> round.
>
> Re write the plans a bit?
>
> Graham
>
> Duncan & Ami McFadyean wrote:
>> Hi all, Remi,
>> I'm not sure about that.
>> I had to replace my outer TP pins at 15 hours.
>> 300++ hours later they are still OK, despite operating mostly from grass
>> strips.
>> In my opinion, the pins are very accurately made. But the holes in the
>> TP tubes are not. My new pins were set-up so that they had to be driven
>> in; I suspect this makes the difference. The PFA requirement is now for
>> an "interference" fit.
>> Duncan McF.
>
>
>
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