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Carlos Sa
Joined: 13 Jan 2006
Posts: 96
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 Posted: Mon Feb 20, 2006 10:50 am Post subject: RE : Re: 601 XL wing attachments (Question for Scott Laughli |
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Scott, I'm getting very close to this stage of the project (in a week or two).
Would you please elaborate on the actual drilling operation, e.g., how did you position the drill
press vs tabe and spars; how did you lock them in place; etc.
I'd appreciate every bit of info, so I can reduce risk and stress...  )
Thanks in advance
Carlos
--- N5SL <nfivesl(at)yahoo.com> a crit :
| Quote: |
Hi Terry:
I created a full-sized drawing in Visio and plotted it
100% size.
I then inserted the first wing spar into the center
spar and taped the drawing to the assembled spars.
I then clamped it all together and made everything
match up to the drawing.
Then I used a punch to mark the holes through the
paper.
I then drilled the holes and reamed them according to
the drawings. Here's a photo just before drilling:
http://www.cooknwithgas.com/10_19_03_SparAttachAngle.JPG
(The wing spar is on the left and center spar on the
right)
Here's what it looked like bolted together:
http://www.cooknwithgas.com/10_24_03_Dihedral.JPG
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Lche-vitrine ou lche-cran ?
magasinage.yahoo.ca
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_________________
CH601-HD, plans
Montreal, Canada |
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nfivesl(at)yahoo.com
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| Posted: Mon Feb 20, 2006 12:08 pm Post subject: RE : Re: 601 XL wing attachments (Question for Scott Laughli |
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Hi Carlos:
I followed the drawings very closely - mostly 6-W-4.
In preparing my response to your question, I
remembered why I didn't use bolts when I drilled the
holes because the holes were smaller than the bolt
diameter. You have to drill the holes smaller, then
ream them to 5/16". This makes a very tight fit for
the bolt.
Using a Microsoft product called "Visio" I drew an
exact drawing with all the dimensions of the center
spar - full size. It included the rivets, holes, caps
and everything. Then I drew and exact copy of the
right spar with rivets, holes and everything (the
first few feet of the spar anyway). Then I "grouped"
each piece (wing spar and center spar) so that I could
move them around as a unit. I lined up the wing spar
in position with the center spar. This way I could
set the dihedral and watch where the bolt holes would
be located - remember the holes will line up slanted
in the center spar and in a straight line with the
wing spar caps.
The trick here was to see the hole positions in the
spar caps through the caps in the center spar with the
use of a drawing. The 6-W-4 gives dimensions where to
put the holes in the wing spar caps but not in the
center spar. Since you have to drill the holes through
the center spar first, you need to know where these
will fall or you will have holes on the wrong place in
the wing spar. Does this make sense?
OK, so I had the drawing plotted to full size as shown
in the photo below. Then I laid out the center spar
on my 12' long table and inserted one wing spar. I
put the drawing on top of the assembly and lined up
the rivets, spar caps, flanges, etc. My drawing was
very accurate and matched up perfectly to the spars
thanks to excellent craftsmanship by Jason Isley who
built my spars (Thanks Jason).
After fiddling with it for a while making sure
everything was in line, I clamped everything tight and
drilled a vertical hole (in the proper size for the
reamer). That's when I was stumped because I needed
to pin this in place. I used a drill bit for the
first one, but then I had to pin the second one. If
you want to buy a few drill bits in the proper size
stated by the reamer, then you will be fine.
Next with all the holes drilled and pinned, I removed
the pins one-at-a-time and reamed the holes and
inserted bolts.
I can't help you with the stress because I had plenty
of it. Check, recheck and then check again before
drilling. My biggest worry was that I had something
backwards, but lo-and-behold it is right and the first
wing fit.
Good luck and let me know if any of the above is not
clear.
Scott Laughlin
www.cooknwithgas.com
| Quote: |
<carlosfsa(at)yahoo.com>
|
| Quote: | Would you please elaborate on the actual drilling
operation, e.g., how did you position the drill
press vs tabe and spars; how did you lock them in
place; etc.
I'd appreciate every bit of info, so I can reduce
risk and stress... )
Thanks in advance
Carlos
--- N5SL <nfivesl(at)yahoo.com> a crit :
>
<nfivesl(at)yahoo.com>
Here's a photo just before
drilling:
|
http://www.cooknwithgas.com/10_19_03_SparAttachAngle.JPG
| Quote: | > (The wing spar is on the left and center spar on
the right)
|
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