Brett H

Well Known Member
Patron
I currently have a minimum clearance of 1/16”.

Is this sufficient or how much should I move the Trim Tab inboard?

Thanks.

Brett H
Columbus, IN

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you didn't specify which model you're building, but the plans for the RV7 call out 3/16" minimum there. They call out 1/4" gap for the other control surfaces so I made my trim tab gap 1/4" to match everything else.
 
The skins are pre punched so that gap is determined by how you drill the hinge.

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It does appear to me that you may have very slightly misaligned the two starter holes in the hinge and therefore have a slightly smaller gap than intended.

Agree that trimming up the trailing edge should be sufficient here but it can’t hurt to measure the final gap and ask the factory.
 
I currently have a minimum clearance of 1/16”.

Is this sufficient or how much should I move the Trim Tab inboard?

Thanks.

Brett H
Columbus, IN

View attachment 119498


Thanks for the responses.

My bad. I figured out what I did wrong.

IMG_4158.jpeg

I drilled both of the pilot holes 1/4” from the end of the hinge. The forward half pilot was supposed to be drilled only 3/16” from the end. My error reduced the clearance 1/16” and fits with the inboard end of the trim tab being 1/16” outboard of the inboard edge of the elevator. Also, I have not found in the RV-14A plans where the minimum clearance is specified.

So, time for a new piece of hinge material. With Van’s not having it in stock, I will either order from Aircraft Spruce or narrow some MS20257-3 hinge material that I have.

Bummer that I made the error. Thanks for the help resolving it.

Brett H
Columbus, IN