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1. 07:09 AM - Re: Wing Tip Installation - Droopy Right... (Jim Fogarty, Lakes & Leisure Realty, Inc.)
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| Subject: | Re: Wing Tip Installation - Droopy Right... |
Matt, Have you check it with your straight edge on the wing with the bell
crank jig in place? Mine is a 1/2 inch low on the right wing and 1/4 on the
left wing. I have not did the split yet on either wing tip. If you get
yours right, please take more pictures for future reference. Thanks for the
help and information guys.
Jim
RV9a Building
----- Original Message -----
From: "Matt Dralle" <dralle@matronics.com>
<rv7-list@matronics.com>
Sent: Friday, July 10, 2009 4:26 PM
Subject: RV-List: Wing Tip Installation - Droopy Right...
>
> Dear Listers,
>
> I installed the wing tips on the -8 last week and they came out perfect.
> I was really pleased and relieved. They each took about 8 hours including
> cutting the plastic lens.
>
> That's the good news. The bad news is that the right tip at the trailing
> edge came out about 1/2" low. The left one is exactly the correct height.
> I measured this by making the short aileron push rod the exact length
> stated on the plans (27 5/8" I think it was) and then using that W-730 jig
> to center the bellcrank and I assume the aileron.
>
> Installation of the left wing tip, which I did first, went really smoothly
> and I had little trouble fitting or aligning. The right one, however,
> really fought me and in my zest to make sure that the lap joint between
> the metal skin and the fiberglass was perfect, I kind of neglected to
> triple check the height of the trailing edge of the tip as it related to
> the aileron. I focused more on the alignment of length of the two and
> that they were correct.
>
> Anyway, I was rigging the ailerons this week and connecting to the control
> stick and that's when I noticed that the right tip was drooping about 1/2"
> lower than the aileron. I tried removing the tip RIB and fusing around a
> bit, but this didn't help, and then I tried slitting the trailing edge of
> the tip. This allowed me to align the tip to the aileron at the inboard
> side of the tip, but it didn't allow me to raise the outboard edge of the
> tip (without a whole bunch of extra fiberglass work).
>
> I'm not opposed to getting a new wing tip and just starting over again,
> but I was wondering if anyone else had this same trouble, i.e. left tip
> fit great, right tip didn't fit very well and was low at the trailing
> edge. I'm wondering if its just a problem with the fiberglass layup.
>
> Now that all of the holes in the skin for the wing tip mounting are
> dimpled (I used #6 screws), fitting a new tip is going to be a real tough
> job because I won't be able to get the tip flat against the skin. Arg...
>
> Any feedback would be appreciated.
>
> Matt Dralle
> RV-8 #82880 N998RV
> Wing-to-Fuselage Fairings (oh, and redoing the right wing tip)...
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