Hi Svein
You take out the hinge-pin, form it as an "S" (app. 20 deg. on each
bend), and tap it careful back in the hinge - after that you have
solved the problem.
Regards Gert
OY-GDS
Den 22/10/2008 kl. 08.38 skrev Sidsel & Svein Johnsen:
> On the two Europa XS's in Norway with more than 20 hours flying
> time, the outer hinge on both ailerons on both aircraft has
> developed noticeable wear. When the ailerons were mounted, no play
> was noticed - not-perfect alignment of the two hinges removed the
> play that exists in these MS-hinges even when new. The ailerons
> were carefully balanced after filling and painting, as per the BM.
>
> No wear is noticed on the inner aileron hinges, nor on the rudder or
> trim tab hinges.
>
> We have both monitored this carefully, without discovering any
> increased play over the roughly 50 + hours flown since first
> discovering this. However, this does not rule out that wear may
> continue at a low rate.
>
> The outer hinge is fitted a fair distance from the tip. Even with
> tight outer hinge, the tip may be moved easily up or down without
> applying much force due to the flexibility of the aileron's structure.
>
> Could the cause of this be small vibrations in the outer,
> unsupported part of the aileron when activating the aileron (i.e.
> not streamlined aft of the wing)?
>
> Even if the outer hinges were tight, the flexibility "does not look
> right". I have not found any other aircraft design at my local
> field where the ailerons flex like this.
>
> I have now fitted an additional, third hinge on each aileron, at the
> tip and of the same type and length as the original outer hinge
> (which I have left in place).
>
>
> Anyone else with similar experience?
>
> Svein
> LN-SKJ
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