F419 attachment revision history

[aj4761]

I'm looking at a 1993 RV4 and found the tail attachment was done with a single bolt on either side through the longerons. Was this design updated in later revisions? The pics attached show the method in question (maroon) vs what am I am used to seeing (white).

Is this design structurally sufficient and if not does anyone have suggestions for a fix? I intend on doing light aerobatics at a minimum at some point.

Thanks everyone.

 

[andoman]

Welcome!
Here’s a link to an old thread. Check out the links that I included in my post #16.

Early RV-4 differences

Hey guys, been lurking on here for a couple years while getting an early 4 finished up that a friend started in the 80's I believe. Have a few bugs to work out, but it is finally in the air. I have tried searching and have found some of them but am hoping you could send me to a thread with a...

vansairforce.net

 

[aj4761]

That's what I was looking for. Thanks!

 

[blaplante]

Looking at the plans links... the plans certainly didn't call for ... what... 4 washers? stacked up.
Early 6 instructions described how to set the HSTAB angle in flight testing. So *some* shimming was considered. But I wouldn't shim with a stack of washers, and that looks like a lot of shim compared to the plans.

 

[Little Al]

Along with the washer stack that edge distance in the bolt is questionable and it there a missing rivet as well