Matronics Email Lists :: View topic - When the rivet hole gets too big

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

When the rivet hole gets too big

Matronics Email Lists Forum Index -> Zenith-List

View previous topic :: View next topic

Author Message

lwinger

Joined: 21 Jun 2006
Posts: 229
Location: Tustin, CA

Posted: Sat Sep 02, 2006 10:29 pm Post subject: When the rivet hole gets too big

When doing side two of my trailing edge rudder skin, one of my last holes "walked" on me.  It was the end rivet on rear rib #3, and it became oblong in a big hurry.  Ouch.



Since it is in a non-structural area, I'm looking for a good way to recover.  BTW, I'm planning to paint the plane, so I'll have opportunity down the road to fill and shape if that is required/makes sense.



One lister has already suggested a larger rivet (A5) and JB Weld if there is still a void.  What would you suggest?

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith-List

_________________
Larry Winger
Tustin, CA
Plans building 601XL/650 with Corvair
Installing fuel system
www.mykitlog.com/lwinger

dredmoody(at)cox.net
Guest

Posted: Sun Sep 03, 2006 8:02 am Post subject: When the rivet hole gets too big

Use the same size rivet WITH JB Weld freshly placed in the hole. That way 

the final appearance is uniform, the strength is adequate and everyone is 

happy. As the JB Weld starts to "gel" (watch your timing carefully) a clean 

putty knife damp (not dripping wet) with denatured alcohol will allow you to 

smooth any exposed epoxy material. 12 hours later, a little careful 400 grit 

sand paper and you're groovin'.



Ed Moody II



---

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith-List

lwinger

Joined: 21 Jun 2006
Posts: 229
Location: Tustin, CA

Posted: Sun Sep 03, 2006 8:28 am Post subject: Re: When the rivet hole gets too big

Ed,



If I understand correctly, shortly after I fill the hole with JBW I place the rivet and pull.  Does the sudden action of the rivet pull run the risk of deforming the JBW and displacing a gob of it which might fall into the bowels of my rudder?  If not, I'll likely go this route.



Another option I had considered was to JB Weld it before I debur the rudder skin.  That way I can fill the void of the hole (with some kind of temporary backing), allow it to dry (using your putty knife/denatured alcohol approach), then hit it with the 400 grit sandpaper to reproduce a smooth outer surface that I can re-drill (the right way this time!).



What do you think?

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith-List

_________________
Larry Winger
Tustin, CA
Plans building 601XL/650 with Corvair
Installing fuel system
www.mykitlog.com/lwinger

dredmoody(at)cox.net
Guest

Posted: Sun Sep 03, 2006 1:52 pm Post subject: When the rivet hole gets too big

I've only built my first airplane, assisted on two others and am in the 

middle of my own second plane so be warned my advice is based on only that 

experience which is far from vast. With that disclaimer out of the way, I 

wouldn't allow the JB Weld to set, then perfect it, then redrill and set the 

rivet. I'd be afraid that the epoxy would, (A) have only the edge of the 

hole to bond to, (B) would be only as about thin as the aluminum sheet 

itself, and (C) would brake off when the rivet was squeezed (our Avex rivets 

expand to fill slightly irreguar holes). I'm not 100% positive but that's 

why I would do the JB Weld and the rivet in the same time frame. Don't gob 

it on but if some does get into the bowels of the rudder, I don't think the 

rudder bowel gods would be terribly overcome with wrath. The rivet will most 

definitely displace the epoxy material.... some inside and some outside. The 

excess on the outside I would conservatively remove (a little bead of the 

stuff around the set rivet head wouldn't be a bad thing). The excess on the 

inside would be the part I would count on to keep it in place and stable. 

Remember like using the Black Death on an RV tank, if you have a cleco in 

that hole clean in before the epoxy sets (alcohol work well).



Don't worry about this repair too much. If this is your greatest concession 

to perfect aircraft construction, you are one blessed pilgrim, honestly.



Ed



Do Not Archive

Do Not get JB Weld in your bowels either



---

- The Matronics Zenith-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Zenith-List

Display posts from previous:

	Matronics Email Lists Forum Index -> Zenith-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum