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12-20-2017, 05:40 AM
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Join Date: Sep 2015
Location: Avon, IN
Posts: 22
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Dimple Screw up
Hi all, I started building my -8 Empennage last month. I'm just about ready to start riveting the skins but somehow while i was dimpling the skins I managed to get a double hole...Do I need to purchase a new skin and replace the whole thing? or is there a fix for this? 
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12-20-2017, 06:32 AM
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Join Date: Nov 2015
Location: Maricopa, AZ
Posts: 21
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Unfortunately, I don't know of a good fix for your extra hole. I think anything you try will not come out looking very good. You might try sending the picture via email to support@vansaircraft.com (include your builder number), and then calling them during their tech support hours.
I had the same thing happen to me when I was using my fancy new pneumatic squeezer to dimple a rib. I ended up punching a new hole in the flange and the result ended up looking almost exactly like your image. I ordered a new rib and hung the old one on my "wall of shame" where I'm collecting all my ... let's call them "learning opportunities". For me, the problem was trying to tease the ram up to get clearance in the tight space before lining the male dimple die up with the intended hole in the rib flange. I teased too far and the ram fired all the way punching a nice new hole where one should not have been. Lesson learned - use a different tool to dimple in tight places.
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Damien Currier
Maricopa, AZ
RV-8 Very Slow Build In Progress
Empennage kit 99% done and placed in long term storage
Wing kit building in progress
Saving for fuselage kit
N163RV (Reserved)
My Build Log
2020 Dues Paid
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12-20-2017, 06:35 AM
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Join Date: Nov 2015
Location: Maricopa, AZ
Posts: 21
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Also - what tool are you using to dimple with? The dimple at the top of your photo has a strange depression around the cone that I've never seen before. Are your dimple dies not flat at the edge? If they are, are you squeezing too hard?
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Damien Currier
Maricopa, AZ
RV-8 Very Slow Build In Progress
Empennage kit 99% done and placed in long term storage
Wing kit building in progress
Saving for fuselage kit
N163RV (Reserved)
My Build Log
2020 Dues Paid
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12-20-2017, 07:05 AM
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Join Date: Jan 2016
Location: Southwest
Posts: 1,119
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Me too
Had this happen to me, but mine wound up with a crack. So I flatten dimple and filed hole so there was no crack and then put two new dimples/rivets on each side. I figure the painter will remove all trace of my screwup.
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John S
WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.
Dues paid 2020, worth every penny
RV9A- Status:
Tail 98% done
Wings 98% done
Fuselage Kit 98% done
Finishing Kit 35% canopy done for now
Electrical 5% in work
Firewall Forward 5% in work
www.pilotjohnsrv9.blogspot.com
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12-20-2017, 05:50 PM
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Join Date: Jan 2013
Location: Johns Creek, GA
Posts: 20
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Dimple failure
Just drill out put in ?oops? rivet and keep going. May need a little filler to make paint cover it adequately.
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12-20-2017, 07:36 PM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,947
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Dimple fix
Ask Vans to be sure but there's several fixes.
Leave it as is and fill it before paint.
Add a rivet equal distant either side.
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Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
wirejock at yahoo dot com
Donated 12/03/2019, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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12-20-2017, 08:33 PM
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Join Date: Nov 2015
Location: Las Vegas NV
Posts: 146
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Local A&P said your paint shop can fill w METAL SET A4 ALUMINUM FILLED EPOXY ADHESIVE and you will never know. Take a space halfway between original holes and put two new rivets in.
METAL SET A4 ALUMINUM FILLED EPOXY ADHESIVE sold at aircraft spruce.
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12-21-2017, 06:48 AM
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Join Date: Jun 2012
Location: Fernandina, Fl
Posts: 74
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I put an extra hole in mine a little further off center from yours. Called Van?s. Solution was to put in too more, on on each side. You?ll end up with two extra rivets and an oops rivet or a -4. You?ll be the only one who notices.
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Doug Geib
KFHB
RV8 empennage complete
QB wings started
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12-21-2017, 07:29 AM
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Join Date: Dec 2007
Location: Flagstaff, AZ
Posts: 2,653
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Quote:
Originally Posted by HAL Pilot
Local A&P said your paint shop can fill w METAL SET A4 ALUMINUM FILLED EPOXY ADHESIVE and you will never know. Take a space halfway between original holes and put two new rivets in.
METAL SET A4 ALUMINUM FILLED EPOXY ADHESIVE sold at aircraft spruce.
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This stuff is good if you are planning to polish but structural epoxy is a little better if you are planning to paint. Flatten the dimple, drill if cracks develop (don't flatten or drill the underlying structure), and install with a dab of epoxy between the structure and the skin. Remove excess and rivet the holes closest to the fix before it sets. Extra rivets as mentioned in other posts are a good idea. If surface is not completely filled, add a little extra epoxy. Finish riveting. When the epoxy is set, carefully file the fill down to the surface - this step can wait until you are ready to prime for painting so any scratches can be filled.
If you are trying to preserve your dimple pattern in a painted surface, take a piece of metal tubing with an inner diameter close to the diameter of the rivet and sharpen the circumference at one end (bevel toward the inside). While the epoxy is not wholly cured, press the tubing into it, leaving an impression that will mimic a rivet.
A similar technique can be used for countersinks that are too deep, simply fill them, flush the top and bottom surfaces of the hole, re-drill, and re-countersink. A rivet or dimpled piece will hold the fill in place and the fill will take the compression loads of setting the rivet without deforming.
Caveat: Both of these techniques are suitable for fixing a single, isolated oops. But multiple errors should be cause for replacement.
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Patrick Kelley - Flagstaff, AZ
RV-6A N156PK - Flying too much to paint
RV-10 14MX(reserved) - Fuselage on gear
http://www.mykitlog.com/flion/
EAA Technical Counselor #5357
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12-21-2017, 09:01 AM
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Join Date: Jan 2007
Location: Battleground
Posts: 4,348
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I see this issue brought up here a lot. Most of the time the damage is done with a pneumatic squeezer. It is really easy to miss hit.
C-frame or hand squeezers give you better feel and rarely will this happen, but it still can, it is just harder to do by accident.
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Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
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