HS Questions

[PilotRPI]

1- on the HS and VS, they show holes to leave open to attach fairings. I will match drill them, but do I dimple them, or do the attachments later use round heads instead of flat?

2- Reference the pictures below. I need to make a cutout for the elevator control arms to move through a spot in the rear HS spar. The cutout is the hatched section in the second picture. They offer a full-scale drawing of the hinge and horns, but how much clearance do i need around them and the spar? Trying to determine how much to trim widthwise on the spars. Looked ahead in the plans but couldn't find anything.

[N804RV]

#1 Just leave them open for now. Match drilling won't matter. But, don't dimple for now. Later, you'll be reaming out those holes and installing nut plates.

[Mach.26]

Maybe this post in the RV-8 forum on the control horn cut out would help. The spar cut outs between the 7 and 8 should be the same. http://www.vansairforce.com/communit...d.php?t=145488

[griffg]

I hope the following will help.

The rectangular hole in the Aft Deck F-714 (drawing 26) where the elevator horns pass through is 2 inches wide.

On my aircraft the dimension across the elevator horns as fitted is a fraction under 1 3/4 inches which gives approximately 1/8 clearance on both sides of the horns to the hole in F-714.

The flange on the rear spar is 5/8 inch. I removed it to a depth of 1/2 inch which was more than I needed to have done.

My suggestion is to remove at least 1 1/16 inch on each side from the join (i.e. 2 1/8 total) and to a depth of 3/8 inch. This will give you a small margin to the front and sides of the rectangular hole in F-714.

The elevator Down Stop F-711E (drawing 27A) on my aircraft protrudes rearwards from the front face of the rectangular hole in F-714 by at least 1/32 inch. This limits the forward movement of the elevator horns.

Good luck with your building.

Gordon

[PilotRPI]

Thanks guys. Those are very helpful. Hopefully my pics are showing now as well. They were there when I first posted, and just put in new links and they are showing again.