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  #1  
Old 09-08-2019, 06:37 PM
RV701775 RV701775 is offline
 
Join Date: Jul 2019
Location: Boston, MA
Posts: 6
Default Elevator Skin - Bad Day

I had a bad day today while priming my right elevator. After prep, I hung the right elevator up to dry and it fell off the hook about a foot onto the grass. It landed long side down and flexed a bit, but luckily I was working over my lawn. I did not see any bends or damage, but it did flex quite a bit. Any thoughts as to whether there could be hidden damage?

Also, after priming I noticed a dent in the skin. I think I may have tipped my cordless drill over and didn't notice. Any thoughts about how to fix this or if it could lead to a crack down the road?

I am going to take a break and get back to it in a day or two.

Thanks

https://drive.google.com/open?id=0B1...pWaklHSHU2MWxR

Last edited by RV701775 : 09-08-2019 at 06:40 PM.
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  #2  
Old 09-08-2019, 07:12 PM
rockwoodrv9 rockwoodrv9 is offline
 
Join Date: Dec 2011
Location: Meridian ID, Aspen CO
Posts: 2,529
Default

I can't tell for sure what to look at. Is it the place under the black tape? It looks like it is just the skin without the ribs so I dont see how flexing could be an issue.
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  #3  
Old 09-08-2019, 07:17 PM
WingsOnWheels WingsOnWheels is offline
 
Join Date: Mar 2009
Location: Plano, TX
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Flexing of the skins is no issue. Some of the larger skins arrive rolled.
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  #4  
Old 09-09-2019, 04:11 AM
RV701775 RV701775 is offline
 
Join Date: Jul 2019
Location: Boston, MA
Posts: 6
Default

Thanks. It is not black tape. Just the lighting where I cut the blue coating back. There is a small dimple in the center that I believe was caused by a dropped tool. I was planning on leaving it for the painter down the road. I don't think it is punctured.

Thanks.
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  #5  
Old 09-09-2019, 09:10 AM
dreed dreed is offline
 
Join Date: Nov 2016
Location: Camas, WA
Posts: 261
Default

You could probably flatten that little dimple out with no issue it'd likely never show.

I wouldn't worry about the drop/flex and if you are like probably everyone else on here - you'll have at least a few more "oh $h** moments when you mess something up. Some of us, more than a few.

Don't let it get you down- keep pounding rivets.
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  #6  
Old 09-09-2019, 09:14 AM
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bkervaski bkervaski is offline
 
Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 1,275
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You may be able to fix this:

* Get some thick clear packing tape
* Apply packing tape in a single layer generously over dent
* Get a large spoon from the kitchen
* Put something like a bucking bar on the opposite side (to support against the pressure you're about to put on the skin)
* Massage dent using the spoon
* Watch magically as it starts to go away .. hopefully

I fixed a pretty bad one using this method.

Important! Be sure not to "massage" beyond your supporting "bucking bar" (or whatever you use) as doing so may create an impression.
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Last edited by bkervaski : 09-09-2019 at 09:21 AM.
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  #7  
Old 09-09-2019, 06:40 PM
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rjcthree rjcthree is offline
 
Join Date: Jan 2007
Location: Bay Village, OH
Posts: 805
Default And....

The spoon trick works, but you’ll probably be left with a little center dimple that probably has a bit of a crack on the point side under magnification. Drill it for #40 or #30, dimple, and lightly set a rivet to nowhere. I think I have three or four of those, at two from the corner of a dropped tungsten bucking bar, and another from a dimpling tool error that I clearly remember.
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RV-9A N183RC/90432: tip-up, O320H2, Ellison, Dynon D180
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Last edited by rjcthree : 09-09-2019 at 06:42 PM.
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  #8  
Old 09-10-2019, 12:00 AM
rv9builder rv9builder is offline
 
Join Date: Jan 2005
Location: Irvine, CA
Posts: 801
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I have a similar dimple in my fuselage tail cone. I have no idea how it got there, but at some point during construction I must have accidentally banged something into the skin. I try to be as careful as possible while building, so at first it really bugged me. But now that a bit of time has passed, I'm not too worried about it. Considering the size of the finished plane, one tiny dimple doesn't seem like much of an imperfection. Build on!
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  #9  
Old 09-15-2019, 12:21 PM
wnplt wnplt is offline
 
Join Date: Feb 2013
Location: Idaho
Posts: 127
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If you plan to paint the painter will fix it.
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