Right, that settles it, I will fill the dip on the wing. You guys have
convinced me.
Thanks
Eddie
ps. would be great to see you again Tim. We are still in the same place.
Ed
on 29/4/03 11:07 am, Tim Ward at ward.t@xtra.co.nz wrote:
>
> Eddie,
> I would fill it again with Polyfiber, as you can do over the smooth primer,
> and
> than sand it back. When filling it I used a flexible metal trowel about 2
> feet
> wide to run it down the spar, bent to form the shape of the chamber, to fill
> the
> uneven surface either side of the spar. Once cured I then used belt sand
> paper of
> differing grit up to 320 mounted on a 3 foot long x 4" wide x 1"thickness
> piece
> of hard wood mounted again on a piece of aluminum with like dimensions (except
> 1/4"
> thickness ) to give it strength and always sanding 45 degrees to the leading
> edge
> not along the spar line, and be gentle as it sands away quickly.
> Worked well. Hope it does for you.
> Must come and see you again next time in Londontown.
> Cheers,
> Tim
>
> 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
>>
>> ---------------------------------------------------
>> This mail sent through http://www.easynetdial.co.uk
>>
>
> --
> Timothy P Ward
> 12 Waiwetu Street,
> Fendalton,
> Christchurch,
> NEW ZEALAND
>
> Ph. 0064 3 3515166
> email ward.t@xtra.co.nz
> Mobile 025 2649325
>
>
>
>
>
>
>
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