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  #1  
Old 09-28-2013, 07:46 AM
uuacallis uuacallis is offline
 
Join Date: Aug 2013
Location: Cary, NC
Posts: 43
Default 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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  #2  
Old 09-28-2013, 08:00 AM
YellowJacket RV9 YellowJacket RV9 is offline
 
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Location: Clearwater, FL KCLW
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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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  #3  
Old 09-28-2013, 08:02 AM
uuacallis uuacallis is offline
 
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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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Empennage Kit Started 9/21/2013
#120783 - N423MJ - reserved
Cary, NC
Dues Paid through Sept 2014

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  #4  
Old 09-28-2013, 08:11 AM
mrt890 mrt890 is offline
 
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On the RV12, you should never have to enlarge or match drill #30 rivet holes.
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  #5  
Old 09-28-2013, 08:52 AM
DaveLS DaveLS is offline
 
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Location: Pensacola, FL & 2R4, Loveland, CO
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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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  #6  
Old 09-28-2013, 10:13 AM
uuacallis uuacallis is offline
 
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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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RV-12
Empennage Kit Started 9/21/2013
#120783 - N423MJ - reserved
Cary, NC
Dues Paid through Sept 2014

Build Log: http://www.myclubplane.com -or- http://www.mykitlog.com/uuacallis
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  #7  
Old 09-28-2013, 10:33 AM
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bullojm1 bullojm1 is offline
 
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Sears, Home Depot and Lowes all sell awl's:

http://www.sears.com/craftsman-scrat...a=00941028000P

http://www.homedepot.com/p/Husky-3-i...6#.UkcErj_3Psc

http://www.lowes.com/pd_142045-1431-...ductId=1016511

I personally have the Sears version, and it works very well for hole alignment for an RV build.
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  #8  
Old 09-28-2013, 11:29 AM
Slane Slane is offline
 
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Location: Hillsboro, OR
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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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  #9  
Old 09-28-2013, 11:37 AM
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rvbuilder2002 rvbuilder2002 is offline
 
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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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  #10  
Old 09-28-2013, 11:58 AM
YellowJacket RV9 YellowJacket RV9 is offline
 
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I stand corrected! Getting jealous of you -12 builders...
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