|
Tonight I
went to Omaha to attend a EAA Chapter 80 meeting. I was not
sure what to expect as I have never been to one of these meetings.
The meeting was very upbeat, relaxing, and the members/guests loved
talking about airplanes. I AM IN THE RIGHT PLACE>>>
WooHoo!!! I met Kevin Faris, fellow RV-7, whom I
had only had e-mail correspondence with when I posted a e-mail to
the Yahoo RV-7 group and he found out I lived in Nebraska.
Kevin and I ended up talking RV's long after the meeting was over
(if I recall correctly, until about 1:45 am and we both had to work
the next day....)
I was
amazed at how willing people were to help when I mentioned I was
working on a RV-7. I got hooked up with Bob Harvey, who was
one of the chapters technical counselors. He didn't even hesitate
when I asked if he would come down and inspect my project and I
live over 70 miles away. My project will cost him over 3 hours
of his personal time in driving alone.
Very nice
group of people. They have a web site at the following address:
http://www.eaa80.org

Before going to the EAA
meeting, I was able to get my leading edge cleco'd together.
This skin fits REALLY TIGHT!! If you look
at my last log entry, I posted a picture of how far off the pre-punched
holes were after I started getting some of my cleco's in the skin.

After I got the skin cleco'd
on, I noticed that I got a slight bulge in the skin near the forward
edge of the leading edge. This is a 0.025" skin and fairly
heavy so to get a bulge here means there is definitely some pressure
of the rib against the skin. I am not real happy with the
fit of the leading edge out of the box.

Here is the inside of
the leading edge skin. The red arrow is pointing at one of
the "knuckles" of the rib flange that appears to be forced
into position.

From the other side,
the rib flange doesn't look too bad. When I went to the EAA
meeting I mentioned my trouble with how tight this skin fit to the
ribs. Several builders have experienced the same thing.
They recommended to take the ribs and run the "knuckles"
through the scotchbrite wheels a couple of times and that will remove
enough material to minimize my fit problems.
Before I final drill these
holes, I am going to try this, but proceed with extreme caution.

After I got the leading
edge sort of together, I wanted to see how it fit to the wing.
Then I ran into my second problem. Even though my wing stand
posts are 114.5" apart, the aluminum angle I used to clamp
the wing to is in the way. You can see how the main wing skin
extends past the edge of the wing spar.
My stand is far enough
apart to move the spar over to clear the aluminum angles, but I
have everything clamped down, aligned, and have removed my wing
twist. It is going to be easier and quicker to take out the
die grinder and notch the aluminum angle.

You have to look closely
here, but you can see how the lower aluminum angle will interfere
with leading edge skin. When you mount the wing to the stand,
ensure the aluminum angle on the wing stand is at least 3/4"
from the edge of the main spar and you will not have the interference
problems I am experiencing.

I took
a rotary burr bit and started notching out the aluminum angle.
This was not as easy as I thought it would be.

Below, the picture
shows a piece of scrap aluminum I placed between the spar and the
aluminum angle I am notching. As you can see, the aluminum
angle took a beating. I am glad those marks are not on my
spar.

Alright, I am notched
and ready to see if the leading edge will fit on the wing.

Yep, plenty of room to
spare.

Finally,
all those parts in the garage and beginning to resemble a wing.
After I notched the aluminum angle so that I could position the
leading edge, all the leading edge to main spar pre-punched holes
lined up perfectly. This pre-punched kit is the only way to
go!!!

Just another
shot from the bottom side of the wing.

In the picture below,
the arrow is pointing to the pilot hole Van's puts on the bottom
side of the leading edge skin for the wing tie-down. It looks
like it lines up really well. A hole to drill another day.

|