Drill bits to drill main spar attach holes.

[Bryan Cotton]

I drilled and reamed my spars together on my drill press. Final ream was .3725". Then I used a bushin to transfer the holes to the fuselage. The fit is awesome. I highly recommend this technique. When my wings are on and I shake the tip in any direction there is no slop.

[gammaxy]

So for those of you who have drilled out the attach blocks with 3/8 bit and used AN6 bolt or trailer hitch pin – have you been happy with the fit? I’ve heard comments about having to lightly “tap” the bolt or pin into place after drilling.

I used the Fastenal bit I linked to earlier in this thread (sounds like the same one you are using). Unfortunately, I don't remember the diameter I measured for the AN6 bolt. My experience was the same as Corby202--only had to tap the bolts in when installing on the airplane.

I occasionally shake the airplane by the wingtip to see if there's any looseness and I haven't noticed any.

[ededoad]

I did find the 3/8 by 1/4 inch Id tube so all you would need is a 1/4 inch drill bit about 6 inches long. If you need them just let me know. I might run across the 1/4 inch drill bit by then.
Ed

[vernd]

Thanks for the replies. Great info. I feel a lot better moving forward on the wings.

[demodean]

Greetings fellow Sonex builders! Recently, I discovered that our local airport manager is good friends with Jeff Schultz. I had a few questions regarding wing rigging and he put us in touch. Very nice guy. Jeff recommended I create a post asking if anyone has a set of wing drilling bits that they are willing to loan. I'm ready to rig and would be grateful for the opportunity to borrow a set. Thanks in advance for any assistance out there.

Regards,
Dean

[petep]

try the ASA link below. John Davis was the contact in years past but not sure who keeps the loaner tools at this point

http://www.americansonexassociation.org ... index.html

Pete

[Gripdana]

I have them. Send me a PM and I will send them to you.

[NWade]

All -

Resurrecting this thread for a quick question: When you use the long drill bit & steel tube bushing method and are drilling front-to-back, are you using a 90-degree adapter on your drill (due to the angled fwd fuselage sides)?

Thanks,

--Noel
Sonex #1339

[Bryan Cotton]

Noel,
I used a pneumatic drill. It was small enough to fit. I may have trimmed a foot long 1/4" bit to get the optimal length.
https://youtu.be/6wGUBuIGPXI

[NWade]

Noel,
I used a pneumatic drill. It was small enough to fit. I may have trimmed a foot long 1/4" bit to get the optimal length.
https://youtu.be/6wGUBuIGPXI

Ah, perfect illustration of the needed space. Thanks!

--Noel