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thesupe(at)hotmail.com
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 Posted: Sun Sep 14, 2008 2:14 pm Post subject: setting flaperon hanger bracket questions (on Kitfox 4) |
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Hi all. Well things are moveing along on my project C not to far from being ready to cover. I am finishing up the last things on the wings and am now trying to temporairly mount the flaperon hanger brackets. In the manual it says to drill the holes before covering to keep the debris out of the finished wing. On page W-D-5 of the Sept 24 92 manual edition it shows a picture of how far back to mount the bracket. 0.194 from the trailing edge of the wing to the front of the upper bolt that holds the flaperon hinge to the brackets. I made a tool to gauge that dimention (see picture) and that forces the brackets up the wing to the point that they start to spread open. (see picture) If it is too tight now what will it be like after the layers of fabric and finishing tape are in place? How critical is that 0.194 dimention or will it make any real difference if the flaperon is somewhat farther back so that one isn't bending the brackets to get them to close up on the bottom of the rib? If you bend/distort them very much then the hole spaceing will change and the flaperon hinges wont fit. When I rivited the brackets togeather I used one of the hinges to space the holes the right distence apart as I drilled the rivet hole. Hopefully I was able to put my question on paper in a way that makes sence. Thanks Jim Chuk Kiffox 4 building Mn
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Tom Jones
Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA
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| Posted: Sun Sep 14, 2008 5:07 pm Post subject: Re: setting flaperon hanger bracket questions (on Kitfox 4) |
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Jim,
I had the same concern when I did this step in construction. I just went out and measured mine and they are .2 in back from the trailing edge. The fabric and paint won't increase the thickness enough to detect when you do the final assembly.
To make sure everything was lined up and would work freely I drilled the holes in the wing ribs with the flaperon bolted to the brackets. When I did the final assembly I used the same procedure to prevent any miss alignment of the hinge bolt holes.
For the rear rivet hole (nearest the trailing edge) be sure there is clearance to seat the rivet without hitting the opposite side rib cap strip.
As far as your question on how critical the .194 inch dimension is. I don't
think it is critical as long as you don't short yourself on room for that rear rivet in the bracket.
A tip. When you drill the bracket holes in the ribs, use a sharp bit and go slow when it hits the aluminum backing epoxied on the inside of the cap strips. I pushed a couple of those off with the drill bit and had to re-epoxy them. Probably would be a good idea to clamp or block that aluminum strip in place so it can't be pushed off while you drill.
I scanned a picture and attached. Not sure if it will show up well or not.
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_________________
Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA |
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Lynn Matteson
Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan
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| Posted: Mon Sep 15, 2008 5:09 am Post subject: setting flaperon hanger bracket questions (on Kitfox 4) |
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I learned right on this list that that dimension isn't all that
critical...only that all hinge brackets are the same dimension. I
found out like you did that that area is going to get real tight
after covering. I cheated on the dimension a bit...can't recall how
much right now, and it all came out just fine.
Lynn Matteson
Kitfox IV Speedster
Jabiru 2200, 562 hrs...engine assembled and back in the plane;
waiting for new ignition system
Status: "Condition grounded, but determined to try." (Pink
Floyd..."Learning to Fly")
do not archive
On Sep 14, 2008, at 6:12 PM, Jim_and_Lucy Chuk wrote:
| Quote: | Hi all. Well things are moveing along on my project, not to far
from being ready to cover. I am finishing up the last things on
the wings and am now trying to temporairly mount the flaperon
hanger brackets. In the manual it says to drill the holes before
covering to keep the debris out of the finished wing. On page W-
D-5 of the Sept 24 92 manual edition it shows a picture of how far
back to mount the bracket. 0.194 from the trailing edge of the
wing to the front of the upper bolt that holds the flaperon hinge
to the brackets. I made a tool to gauge that dimention (see
picture) and that forces the brackets up the wing to the point
that they start to spread open. (see picture) If it is too tight
now what will it be like after the layers of fabric and finishing
tape are in place? How critical is that 0.194 dimention or will
it make any real difference if the flaperon is somewhat farther
back so that one isn't bending the brackets to get them to close up
on the bottom of the rib? If you bend/distort them very much then
the hole spaceing will change and the flaperon hinges wont fit.
When I rivited the brackets togeather I used one of the hinges to
space the holes the right distence apart as I drilled the rivet
hole. Hopefully I was able to put my question on paper in a way
that makes sence. Thanks Jim Chuk Kiffox 4 building Mn
>
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>
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Stay up to date on your PC, the Web, and your mobile ph93185mrt/
direct/01/' target='_new'>See Now
<Kitfox 4 build pics 033.jpg>
<Kitfox 4 build pics 031.jpg>
<Kitfox 4 build pics 032.jpg>
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_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM |
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