Today's Message Index:
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1. 02:28 PM - Wing Tip Installation - Droopy Right... (Matt Dralle)
2. 04:57 PM - Re: Wing Tip Installation - Droopy Right... (Jim Gray)
Message 1
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| Subject: | 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)...
Message 2
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| Subject: | Re: Wing Tip Installation - Droopy Right... |
Matt,
I ran into the same problem, and slitting the trailing edge worked
like a champ. The difference may be that I slit the trailing edge
before I had drilled the holes all the way around the tip that attach
it to the wing. You might try putting clecos in just the top section
of the wingtip, leave the bottom free, and see if that allows you to
move the wing tip into alignment. I gather all of the holes have
been drilled, so it may be too late, but it may give you an idea how
to attack it.
Good luck,
Jim Gray
N747JG RV-8 100 hours
On Jul 10, 2009, at 3:26 PM, Matt Dralle wrote:
>
> 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)...<2009.07.02 - RV-8 - Right Wing Tip Installation A
> (42).jpg><2009.06.28 - RV-8 - Left Wing Tip Installation
> (39).jpg><2009.07.02 - RV-8 - Right Wing Tip Installation A
> (40).jpg><2009.06.28 - RV-8 - Left Wing Tip Installation (42).jpg>
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