Could the plans be wrong??

[NorthernRV4]

I've heard there are errors on the RV-4 plans and I am wondering if this could be one of them. I fabricated Elevator spar reinforcement plates E-410/411 and after drilling the first one thought the edge distance looked a little small. All references I have state min edge distance is 2x rivet shank dia. (2x.125" or .25") I have 3/16" in both directions in each corner. I'm wondering if I should lay the holes out again (and make a new one) to maintain the recommended distance. Are the plans wrong??

[/url] Vans RV-4 Empennage by jim_soutar, on Flickr[/IMG]

 

[rbibb]

IIRC edge distance is ok if >1.5 d. I think the plans are fine in this case.

 

[David Paule]

Edge distance is measured from the center of the hole.

Dave

 

[XOverZero]

Edge distance is measured from the center of the hole.

Dave

...or 1.5D from the edge of the hole. All same same.

 

[NorthernRV4]

I knew you fine folks would offer insight. I didn't realize edge distance was measured from anything but the edge of the sheet to the edge of the hole. Learn something new everyday. Thanks guys.