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Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 25858
Location: Livermore CA USA
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 Posted: Fri Jul 10, 2009 1:28 pm Post subject: Wing Tip Installation - Droopy Right... |
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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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lifeofreiley2003(at)yahoo
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| Posted: Fri Jul 10, 2009 2:55 pm Post subject: Wing Tip Installation - Droopy Right... |
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If you drilled and fit your tip before rigging... well there it is. Tips are the very last fit. They move around too much and your goal is to match the rigging.
-d-
--- On Fri, 7/10/09, Matt Dralle <dralle(at)matronics.com> wrote:
| Quote: | From: Matt Dralle <dralle(at)matronics.com>
Subject: Wing Tip Installation - Droopy Right...
To: rv-list(at)matronics.com, rv8-list(at)matronics.com, rv7-list(at)matronics.com
Date: Friday, July 10, 2009, 4:26 PM
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)...
|
| | - The Matronics RV7-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV7-List |
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yenduc(at)sbcglobal.net
Guest
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| Posted: Fri Jul 10, 2009 4:50 pm Post subject: Wing Tip Installation - Droopy Right... |
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Mat
One possible solution is to carefuly split the trailing edge of the wing tip. This can be done with a hack saw blade. Thetip can then be pulled apart. Insert a layerof fiberglass
cloth impregnated with a thick slurry of epoxy mixed with milled glass. The trailing tip can then be positioned to line up with the aeleron's trailing edge, and clamped until it sets.
Then trim off fiberglass. Then fill any holes and sand to finish. If done properly, it should be as strong as original.
Good luck!
Dave
Sent from my iPhone
On Jul 10, 2009, at 2:26 PM, Matt Dralle <dralle(at)matronics.com> 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>
| | - The Matronics RV7-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV7-List |
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lifeofreiley2003(at)yahoo
Guest
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| Posted: Fri Jul 10, 2009 5:16 pm Post subject: Wing Tip Installation - Droopy Right... |
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Matt,
I don't agree with patch and fit. Just like wheel pants, if they are not lined up correctly it will show in performance. Don't PATCH it, fix it properly.
-d-
--- On Fri, 7/10/09, David Cudney <yenduc(at)sbcglobal.net> wrote:
| Quote: | From: David Cudney <yenduc(at)sbcglobal.net>
Subject: Re: Wing Tip Installation - Droopy Right...
To: "rv7-list(at)matronics.com" <rv7-list(at)matronics.com>
Date: Friday, July 10, 2009, 7:45 PM
David Cudney <yenduc(at)sbcglobal.net>
Mat
One possible solution is to carefuly split the trailing
edge of the wing tip. This can be done with a hack saw
blade. Thetip can then be pulled
apart. Insert a layerof fiberglass
cloth impregnated with a thick slurry of epoxy mixed with
milled glass. The trailing tip can then be positioned
to line up with the aeleron's trailing edge, and clamped
until it sets.
Then trim off fiberglass. Then fill any holes and sand to
finish. If done properly, it should be as strong as
original.
Good luck!
Dave
Sent from my iPhone
On Jul 10, 2009, at 2:26 PM, Matt Dralle <dralle(at)matronics.com>
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>
Forum -
FAQ,
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-Matt
Dralle, List Admin.
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| | - The Matronics RV7-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV7-List |
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