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  #1  
Old 08-10-2021, 03:23 PM
RV-Ogler RV-Ogler is offline
 
Join Date: Aug 2021
Location: California
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Default Edge distance questions

I buggered up a hole drilling out a rivet on my RV14 rudder and had to up size the No 4 rivet to a No 5. Waiting to hear what Vans says about it, part R-606PP. Is the distance measurement 2X diameter from the center of the hole?

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  #2  
Old 08-10-2021, 04:39 PM
Norman CYYJ Norman CYYJ is offline
 
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From the center of the rivet being installed.
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  #3  
Old 08-10-2021, 04:41 PM
Girraf Girraf is offline
 
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Yes, Edge Distance is measured from the center of a hole to the material edge.

That hole doesn't look bad to me but I'm not sure if that pre or post upsizing to #5 rivet hole.
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  #4  
Old 08-10-2021, 04:44 PM
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wirejock wirejock is offline
 
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Default Edge distance

Depends a little on material but typically 2D from center of hole to any edge. I do suggest practicing on drilling rivets. Ask if you need some best practice advise.
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  #5  
Old 08-10-2021, 05:01 PM
RV-Ogler RV-Ogler is offline
 
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The picture is from after upsizing from a 4 to a 5.
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  #6  
Old 08-10-2021, 06:58 PM
Desert Rat Desert Rat is offline
 
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Rule of thumb is 2d from center of the hole, or 1.5 d from the edge of the hole, but if you look at the mil spec its actually a little bit less than that.

Vans has a link to the appropriate mil-spec on their web site under the builder support tech Q&A section.

https://www.vansaircraft.com/faq/mil...n-and-install/

The min mil-spec edge distance for a -5 non flush rivet is .281"

It's important to understand that a mil-spec is generic approved engineering data that can typically be defaulted to in the absence of other approval, but if manufacturing prints say something else, then that would take precedence.
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  #7  
Old 08-10-2021, 09:24 PM
blaplante blaplante is offline
 
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Default Another Option

Instead of going from #4 to #5 another option is CherryMax oversized rivets for a slightly messed up hole (per the link typical oversize is .01"
So a #4 would be 0.125, the Cherrymax oversize would be 0.135,
while a #5 would be 0.156"
So it would certainly lessen edge distance concerns.

https://aircraft-tool.com/shop/detai...ookieSupport=1

Obviously you'd want Van's opinion on using the CherryMax instead of a solid rivet.
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  #8  
Old 08-11-2021, 08:58 AM
RV-Ogler RV-Ogler is offline
 
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Showed the pic to mothership, was told to build on. I do have a Vans practice control surface kit in my shop Iím gonna work on that first.
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  #9  
Old 08-12-2021, 07:05 AM
JeremyL JeremyL is offline
 
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Yeah, looks fine, build on.
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  #10  
Old 08-12-2021, 07:52 AM
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acam37 acam37 is offline
 
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When in doubt, ask the people at Vans. You should see the stuff I deal with on store bought planes. You would be appalled at what quality control lets go the door. Some of the worst riveting Iíve ever seen is on Cessnas.
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