Today's Message Index:
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1. 05:24 AM - Re: Wing Tip Installation - Droopy Right... (Kopp, Kenneth G CDR HSM-70, N0 Exec Staff)
2. 07:08 AM - Re: Re: Wing Tip Installation - Droopy Right (Glenn Bell)
Message 1
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Subject: | Wing Tip Installation - Droopy Right... |
Matt -
Same exact problem with mine as well. The left side was perfect without any fussing.
The right side is about 3/8" low at the T/E corner. The two tips are certainly
different (not just mirror images)...when I was making my lighting back
plates I trimmed them to match the exact contour of the inside faces of the
each tip. When I compare the left plates to the corresponding plates of the right
tip they are significantly different shape and size...you cant notice this
because you'll never be able to see both close together but it does make you
wonder about the quality of the molds used to fabricate the tips.
I have not yet decided if I'll try to fix this or not. Aerodynamically it will
be insignificant. Aesthetically, I doubt you will ever notice since on the ground
the T/E is so low you'll never be able to see the line from flap-to-aileron-tip.
I thought about slitting the trailing edge but with all the holes drilled this
isn't going to work. Something has to move.
Another options would be to fab an aluminum backing plate for the lower holes...realign
the tip and redrill the lower holes through the backing plate...the #6
dimples are too small to worry about.. IMHO
Best of luck,
Ken
-----Original Message-----
From: owner-rv8-list-server@matronics.com [mailto:owner-rv8-list-server@matronics.com] On Behalf Of Jim Gray
Sent: Friday, July 10, 2009 19:55
Subject: Re: RV8-List: 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>
Message 2
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Subject: | Re: Wing Tip Installation - Droopy Right |
For what its worth=85I used the alignment jigs exactly as called for in
aligning the ailerons=85when I then lined up the flaps it seemed that
they
were a little low at the fuse intersection=85I temp installed the tips
and
noticed that the ailerons were a little low in relation to the tips=85I
looked
at the the transition of the ailerons and how they subjectively looked
in
the transition of the upper and lower surfaces of the wings..the lower
surface should have looked almost flat but it wasn=92t..so=85I aligned
the
aileron to what I felt was the appropriate trail position without regard
to
the jig..when I did that the flap nestled up to the fuse perfectly and
the
tip matched the aileron like it should=85I put a couple bolts in the rib
alignment holes and ran a string out to the rear edge of the
aileron=85it was
off by =BD inch or so=85so=85.i think , in my case , the alignment
hole(s) were
not in the proper place to be used as reference points=85
Had I proceded as instructed , both ailerons would hav been deflected,
the
tips wouldn=92t fit and the flap intersection would have looked pretty
bad..also, our kit is qb and the tips are epoxy resin..
From: owner-rv8-list-server@matronics.com
[mailto:owner-rv8-list-server@matronics.com] On Behalf Of
Speedy11@aol.com
Sent: Saturday, July 11, 2009 11:13 AM
Subject: RV8-List: Re: Wing Tip Installation - Droopy Right
Matt,
I have a similar problem except that mine are both off my about 1/2
inch.
But my tip are the old style and about 8 years old. I decided to go
ahead a
fly it and see how it handles and then attack the problem once I've
talked
to others.
It flies great! I'm not sure I'll change anything.
Let us know on the forum if you find an answer.
Stan Sutterfield
1.0 Hrs
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.
_____
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