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  #1  
Old 01-21-2018, 02:20 PM
Dennis Harm Dennis Harm is offline
 
Join Date: Feb 2015
Location: Cadott wisconsin
Posts: 22
Default RV14A inboard wing ribs

Due to not paying attention to directions I dimpled the top flanges of the inboard ribs that attach to the wing walk doublets. These rib holes are counter sunk on the top inboard wing skins. Should I flatten the dimples out or leave as is, thanks Dennis
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  #2  
Old 01-21-2018, 03:20 PM
Carl Froehlich's Avatar
Carl Froehlich Carl Froehlich is online now
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
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Quote:
Originally Posted by Dennis Harm View Post
Due to not paying attention to directions I dimpled the top flanges of the inboard ribs that attach to the wing walk doublets. These rib holes are counter sunk on the top inboard wing skins. Should I flatten the dimples out or leave as is, thanks Dennis
Assuming you did not machine countersink the skins, I recommend you dimple the wing skin, the doubler and the wing ribs. Not only is this much easier to do, I believe it is a stronger joint. The rivets come out perfect on the top skin so there is no downside. You will need to use a longer rivet then Vanís calls for in the plans - but there are many places where this happens.

If you already countersunk the skins then yes, use your squeezer to flatten out the rib dimples.

Carl
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Old 01-21-2018, 03:34 PM
asw20c asw20c is offline
 
Join Date: Jun 2010
Location: Edgewood, NM
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I agree with Carl. I did as the plans directed, i.e. making a shallow countersink so that the rivets stick up slightly on the wingskin on the inboard-most 4 ribs. If I were to do it over again I would have dimpled the skin and countersunk the doubler plates. Since you already dimpled the ribs I would simply dimple the doubler plates and skin as well. In the end I don't think you will be able to tell any difference from the appearance.
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  #4  
Old 01-22-2018, 07:56 AM
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czechsix czechsix is offline
 
Join Date: Mar 2006
Location: Spring Hill, KS
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I got my wings secondhand and the countersinking & riveting in the wingwalks area looked pretty bad. I ordered new upper inboard skins and wingwalks doublers and dimpled the ribs, doublers, and skins. Looks beautiful now (BTW this is also how I did my RV-8 wingwalks almost 20 years ago). I don't understand why Vans tells you to countersink this area...It's harder to get good results and as Carl mentioned results in a weaker joint compared to dimpling. I also highly recommend dimpling the aft baffle -to- tank skin rivets...I've previously posted about that area.
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