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Old 05-26-2008, 08:55 PM
danielhv's Avatar
danielhv danielhv is offline
Join Date: Jul 2007
Location: Mesquite, TX
Posts: 936
Default Edge distance after repair... (R-710 again)

I made the repair recommended here, but now looking at the part after clecoing in place, I am concerned about edge distance for the affected area. The plans are calling for AN426AD3-4's which require a 0.156" edge distance. In the spot I made the repair, the "low point" is .1350"... everything else is in the green, just the one low spot. Suggestions?

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Old 05-27-2008, 07:55 AM
skyyking56 skyyking56 is offline
Join Date: Jul 2006
Location: Rockford Illinois
Posts: 113
Default edge distance to center of hole

Hi Daniel,
I think that the edge distance is from the edge to the centerline of the hole.
I think standard is 2 times diameter, but there is a minimum of 1.5.
1.5 times .098=.147"
Pretty close to what you have there, but you will know it is there.
Your call,
7A wings
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Old 05-27-2008, 08:25 AM
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LifeofReiley LifeofReiley is offline
Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778

Again... this is a cheap part. Replace it. You will not be the first. You must need something else from Van's. JMHO
Retired N622DR - Serial #V7A1467
VAF# 671
Repeat Offender / Race 007
Friend of the RV-1
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Old 05-27-2008, 09:18 AM
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Rick6a Rick6a is offline
Join Date: Jan 2005
Location: Lake St. Louis, MO.
Posts: 2,346

It is very difficult to accurately measure distance without a scale let alone on the basis of a photograph, but from my
perspective, the e.d. doesn't look unacceptable or even much different than the e.d. on the other hole. Although
minimum edge distance of 2 times hole diameter is standard, (and it appears to my untrained eye that the hole meets that
requirement), minimum e.d. as measured from the center of the hole to the edge of the part is 1.5 (.147 for a #40 hole) is
often considered acceptable.

Rick Galati
RV6A N307R"Darla!"
RV-8 N308R "LuLu"
EAA Technical Counselor
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Old 05-27-2008, 12:20 PM
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cytoxin cytoxin is offline
Join Date: Apr 2006
Location: south carolina
Posts: 1,111

replace it...2d is .187 from the center of the hole. trim to the outside of the hole on the new part then debur accordingly. this part was 11.00 when i mangled mine. of course you gotta wait a few days for it. YMMV good luck
William Weesner/ still kicking.

Last edited by cytoxin : 05-28-2008 at 03:46 PM.
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Old 05-27-2008, 01:31 PM
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danielhv danielhv is offline
Join Date: Jul 2007
Location: Mesquite, TX
Posts: 936

got the word from Vans today... Sent them the story and pictures, here is their email:

I wouldn't worry about it. The material is fairly thick, so ed is less of a
concern. If you wish you could add another rivet close to the one with poor
ed to reinforce it.


Building on! Thanks everyone!
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Old 01-06-2021, 05:49 PM
Anon455 Anon455 is offline
Join Date: Dec 2020
Posts: 51

Where are these minimum edge distances coming from? Is there an experimental/invisible aircraft maintain manual I'm missing? I look in the Van's manual and in AC 43.13 and in Mil Std documents and I find something different.
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