Eddie;
Fill the dip!!!!! You know its there, and if you paint without filling, every
time
the airplane is setting in the sun you will see the dip, and your commit to
yourself will be "darn" I wish I had filled that dip before I painted the
airplane.
Jim Brown
bizzarro@easynet.co.uk wrote:
>
> Hi All
>
> Having filled and sanded our wing surfaces, we thought that they were pretty
> good and thus ready for smooth-prime. So smooth-prime we did. However the
> smooth-prime and a trusty lead lamp show that things are not as good as we
> originally thought. Most of the inconsistencies are easily rectified, however,
> it became apparent that there is a dip just in front of and just behind the
> spar. It is only small, and cannot be seen in normal lighting conditions. I
> would say that the dip is about 0.5mm deep approximately 2cm either side of
> the
> spar.
>
> So the questions are this.
>
> Do we
>
> a) Leave it alone as its effect on the airflow over the wing will be
> negligible
>
> Or
>
> b) Fill the dip and sand to blend it into the surrounding surface.
>
> If a, what is the best method? You see, when we were filling this part
> before, it was filled high and sanded down until the cloth on the spar could
> just be seen under the filler. I guess that what was happening was that the
> skin over the foam was flexing in a downward direction whilst being sanded and
> the spar wasnt, hence the discrepancy in the curve.
>
> Any ideas that might help us on this issue?
>
> Cheers
>
> Eddie
>
> G-SELF. Jabiru 3300 powered classic
>
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>
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