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chris Sinfield
Joined: 28 Nov 2006
Posts: 270
Location: Sydney Australia
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 Posted: Sat Dec 14, 2013 11:32 pm Post subject: Joining the wings. Finally |
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Hi everyone
I have finally finished enough to join the wings to the fuse next week.
I can't find any info in the photo guides on drilling the back spar hole
There is a little info in page 6-S-3 of the plans.
Is that all there is?
If so
What are the tips and tricks to the wing installation ?
Chris
I hope I get it right or it won't fly right.
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psm(at)att.net
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| Posted: Sun Dec 15, 2013 1:37 am Post subject: Joining the wings. Finally |
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Hi Chris,
I gave up on the photo guides early, so I don't remember what they had
to offer on the wing mounting.
As I recall there were two big issues to resolve. The first and most
difficult was drilling through all the layers of wing root and
carry-through to get a nice smooth hole. It needs to fit the bolt very
nicely but not too tight for the bolt to be inserted and removed later.
I went through several attempts at this drilling problem because the
length of the holes made it difficult. The method that worked for me
was to use just drills rather than any reamers. I started with small
drill diameters and "Step Drilled" in very small increments until
reaching the final size. I don't remember exactly how I held it all in
place for drilling but I'm sure it included using at least a few bolts
torqued to hold the carry through and wing together. Then as the holes
got bigger the clamping bolts needed to be swapped so the holes with
bolts became holes without bolts for drilling.
The rear hole was very easy. It sets the rear wing position compared to
the top longerons. You just need to make the measurement shown on the
drawings and clamp the wing in position for drilling the hole.
Good luck,
Paul
Camas, WA
XL out of phase I - in normal flight operations.
On 12/14/2013 11:32 PM, chris Sinfield wrote:
| Quote: |
Hi everyone
I have finally finished enough to join the wings to the fuse next week.
I can't find any info in the photo guides on drilling the back spar hole
There is a little info in page 6-S-3 of the plans.
Is that all there is?
If so
What are the tips and tricks to the wing installation ?
Chris
I hope I get it right or it won't fly right.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=415600#415600
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chris Sinfield
Joined: 28 Nov 2006
Posts: 270
Location: Sydney Australia
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| Posted: Sun Dec 15, 2013 12:14 pm Post subject: Re: Joining the wings. Finally |
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Paul
The front holes were done already and so it's just the rear hole and alignment checks.
Chris
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jaybannist(at)cs.com
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| Posted: Sun Dec 15, 2013 12:53 pm Post subject: Joining the wings. Finally |
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Chris,
Remember you have to cut out some of the bottom wing skin to get access to the inside of the wing to get at the attach bolt. When you cut that access hole, you can then temporarily clamp the rear spar to the attach bracket while you adjust the alignment. You can't really do anything with the distance from the longeron refernece line to the top of the main spar, so the alignment of the rear spar is really all you can do. I think you are building a 601, so I would concentrate on making the rear tip of the wing skin 100mm lower than the top of the main spar. Once your alignment is set, you can drill for the bolt, staying as far away from edges as possible yet with room to access the nut. I put a little witness paint on that nut once it was torqued, and added a look at that to the pre-flightr check list. I drilled a small pilot hole before drilling out to the proper size. Hope this helps.
Jay
[quote][b]
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sabrina
Joined: 15 Jun 2009
Posts: 170
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| Posted: Sun Dec 15, 2013 3:22 pm Post subject: Re: Joining the wings. Finally |
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Do Not Archive
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Last edited by sabrina on Wed Dec 25, 2013 8:29 pm; edited 1 time in total |
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erwinfbeckman(at)gmail.co
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| Posted: Sun Dec 15, 2013 5:48 pm Post subject: Joining the wings. Finally |
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Well put, Sabrina!!! Rick
On Sun, Dec 15, 2013 at 5:22 PM, Sabrina <chicago2paris(at)msn.com (chicago2paris(at)msn.com)> wrote:
| Quote: | --> Zenith601-List message posted by: "Sabrina" <chicago2paris(at)msn.com (chicago2paris(at)msn.com)>
Chris,
If you have a large build space, it is much easier, just mount the wings, final torque the main spar bolts and use 6-S-3, it has everything you need.
This is the procedure I would suggest for a confined space:
Measure the dR vs dL of all the 601XLs you can find. I have found some beyond 50 but within the +/-50 called out in 6-S-3. There is no reason not to shoot for +/-5 mm.
Final drilling of the rear spar and 6B5-4 should be something you do near the end of your build. First off, it is not good for the main spar bolt tolerances to mount and dismount your wings repeatedly during the build (or even after.)
If you have a confined space, mount the left wing using taper pins for the main spar and then drill a 1/16" hole in the rear spar and 6B5-4 leaving the bit in place in order to set the longeron/6W7-1 aft edge reference to 325. Then measure dL. Remove the wing.
Move the airplane over to the other side of the garage and repeat the steps above with the right wing but this time try to match dR to dL. You may not be able to, just do the best you can. Drill this side out to 1/8". Remove the right wing.
If dL=dR, you are done for now, if not ,go back to mounting the left wing and re-drill it to dR's length. Make sure you have these 1/16 and 1/8" holes close enough so the final hole can consume both. Use clecos to hold them in place for now.
In anticipation of having to tighten the final rear spar bolt, drill a 3/4" hole in the bottom skin far enough forward from the rear spar in order to fit an angled head wrench into wing in order to tighten the rear spar bolt. I know the plans (6-W-0) say cut out rectangular a 20x40 notch, but a round 19.05 mm hole in the correct place is better.
One you have painted your airplane and are ready to put the wings on for the last time, torque the main spar bolts to spec with the rear spar clecos out.
At this point you measure dR vs. dL with accuracy. Don't be surprised if the 1/8" hole in the rear spar does not mate up with the hole in 6B5-4, it is to be expected since this time the main spar bolts are torqued to spec. Drill and ream final once you have your desired tolerance (dR vs. dL), install your AN5-5As and torque to spec.
At that point, mount and rivet the previously clecoed flaps in place.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=415627#415627
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bryanmmartin
Joined: 10 Jan 2006
Posts: 1018
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| Posted: Mon Dec 16, 2013 2:43 am Post subject: Joining the wings. Finally |
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On my 601XL, I drilled the access hole for the rear spar bolt through the fuselage side skin. I can reach both ends of the bolt for tightening with the flaps on.
On Dec 15, 2013, at 3:14 PM, chris Sinfield <chris_sinfield(at)yahoo.com.au> wrote:
| Quote: |
Paul
The front holes were done already and so it's just the rear hole and alignment checks.
Chris
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--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus re-drive.
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Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
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