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09-28-2013, 07:46 AM
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Join Date: Aug 2013
Location: Cary, NC
Posts: 43
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Hopefully quick dumb question - Are you supposed to final drill all flanges?
So I am working on the Vertical Stabilizer for the -12 and noted today that unless the #30 hole is one that I have final drilled/or match drilled (like in the rear spar), the LP4-3 rivets won't fit in there.
So for example, no where in the instructions does it claim you need to final drill all the #30 holes on the flanges, but I suspect that unless I do that I won't be fitting these rivets.
Can someone confirm if you had to do that?
Also, I have been re-reading section 5 over and over again, and haven't seen it.
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09-28-2013, 08:00 AM
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Join Date: Oct 2012
Location: Clearwater, FL KCLW
Posts: 1,281
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Yes the holes are all prepunched slightly smaller than final size so will will all need to be final drilled and deburred. When final drilling make sure to drill it in assembly with whatever it will be riveted to.
Not sure about the 12 but in general vans sometimes leaves this out, especially as you get farther along. They take it as a given.
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Chris Johnson
RV-9A - Done(ish) 4/5/16! Flying 4/7/16
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09-28-2013, 08:02 AM
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Join Date: Aug 2013
Location: Cary, NC
Posts: 43
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Thanks for the quick reply, glad my suspicions were correct (except for the fact that I have to go drill and deburr like 1000 holes!)
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09-28-2013, 08:11 AM
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Join Date: May 2008
Location: Friday Harbor, Wa
Posts: 300
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On the RV12, you should never have to enlarge or match drill #30 rivet holes.
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MRT890
120042 RV-12
N112XP
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09-28-2013, 08:52 AM
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Join Date: Oct 2007
Location: Pensacola, FL & 2R4, Loveland, CO
Posts: 222
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Final drilling of the #30 holes is almost never required.
An ice pick or awl wiggled in the hole almost always solves the issue.
If, after trying the ice pick / awl, the rivet still won't go in, try a different rivet.
Then if all elce fails use a reamer.
Anyway, that is what has worked for me.
Also, Vans says that the rivet holes again almost always do not need to be deburred. The 0.020 skins are very easy to over debur, knife edging / enlarging the hole and causing a definite problem.
Generally, with this kit less is more.
-Dave
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120500
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09-28-2013, 10:13 AM
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Join Date: Aug 2013
Location: Cary, NC
Posts: 43
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Ice pick / awl - is this something I can likely pick up at lowes / Home Depot or should I place another order on Avery tools site (because one wasn't included in Cleveland's kit)
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09-28-2013, 10:33 AM
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Join Date: Feb 2006
Location: Baltimore, MD
Posts: 1,039
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09-28-2013, 11:29 AM
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Join Date: May 2008
Location: Hillsboro, OR
Posts: 159
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I've found that a center punch works well also if the it comes to a small enough tapered point.
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09-28-2013, 11:37 AM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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If a rivet will not go into an individual hole (like checking a single hole in the stab spar) it is possible the part has some holes that are just a thousandth or two under ideal diameter (it can happen when punch tools begin to dull, etc.)
If the problem only exists when you are inserting rivets through multiple parts, then it is a hole alignment problem were a tapered pin/awl can be helpful.
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Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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09-28-2013, 11:58 AM
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Join Date: Oct 2012
Location: Clearwater, FL KCLW
Posts: 1,281
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I stand corrected! Getting jealous of you -12 builders...
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Chris Johnson
RV-9A - Done(ish) 4/5/16! Flying 4/7/16
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