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05-21-2015, 08:24 PM
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Join Date: Oct 2012
Location: Clearwater, FL KCLW
Posts: 1,281
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We've all been there. My advice would be to practice and perfect the dimpling, and then finish the part and move on. In a few years when you are finishing things up, go back and look at it and decide if you really want to re-do it. If so, it will be no sweat.
Chris
__________________
Chris Johnson
RV-9A - Done(ish) 4/5/16! Flying 4/7/16
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05-21-2015, 08:24 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by Palamedes
Thanks everyone! I very much appreciate your input and will research/try to do better.
How will the current under dimpling affect the final aircraft? is it doomed at this point or is this just cosmetic?
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Quote:
Originally Posted by rvbuilder2002
No need to be worried....
It is fully acceptable from an airworthiness standpoint, just not to the finish quality that it could be.
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As I said earlier on, it is an appearance thing, not something that makes it unsafe.
I didn't mean to cause you stress... just teach.
I have been doing this for a long time, and have learned a lot in the process. Just trying to pass along some of that learning.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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05-21-2015, 08:34 PM
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Join Date: Jan 2005
Location: Cincinnati, OH
Posts: 1,558
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I have to agree with RV Builder 2002. You can see a depression around the dimple on your set rivets. Maybe the DRDT2 is not set up right. I had a similar problem with a homebuilt DRDT where the male dimple die was standing proud on the dimpling table and created dimples with depressions around the dimple. I switched to my C-frame/dimpling table and problem was solved. The problem was with the fact that the dimple die wasn't flush with the dimpling table. You can see this extra depression around your dimples. This isn't a structural concern - only cosmetic. Lay a steel rule on edge between driven flush rivets. It should lay absolutely flat - with no voids surrounding the rivet.
__________________
SH
RV6/2001 built/sold 2005
RV8 Fastback/2008 built/sold 2015
RV4/bought 2016/sold/2017
RV8/2018 built/Sold(sadly)
RV4/bought 2019 Flying
Cincinnati, OH/KHAO
JAN2020
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05-22-2015, 12:24 AM
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Join Date: Feb 2011
Location: Brisbane, Australia
Posts: 37
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Parts that are back riveted, sure, they`re flat. But even with really nice dimples, it`s almost impossible to get it perfect when you`re riveting the wing skins to the ribs with a gun and bucking bar. Mines got some pillowing of the wing skin between the ribs. Used a C frame and hammer the get those dimples spot on too.
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05-22-2015, 01:48 AM
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Join Date: Feb 2007
Location: San Diego, CA
Posts: 1,670
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Another approach would be to find nearby experienced builders to take a look, and perhaps pass their experience along to you.
Are you building alone? If so, getting advice from fellow builders can result in a quantum leap in your final product.
Most builders are more than willing to help! 
__________________
Pete Hunt, [San Diego] VAF #1069
RV-6, RV-6A, T-6G
ATP, CFII, A&P
2020 Donation+, Gladly Sent
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05-22-2015, 07:37 AM
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Join Date: May 2015
Location: Charlotte, NC
Posts: 16
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Well I'm glad this came up as I'm learning from it too. I ordered a DRDT2 after seeing how fast and easy it was for Jason in his videos. Or maybe that was the time compression...anyway it looked really fast :-)
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05-22-2015, 08:27 AM
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Join Date: Jan 2015
Location: Blairsville, GA
Posts: 202
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Quote:
Originally Posted by RayA
Well I'm glad this came up as I'm learning from it too. I ordered a DRDT2 after seeing how fast and easy it was for Jason in his videos. Or maybe that was the time compression...anyway it looked really fast :-)
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Thats very much time compression =) Just be sure to load it correctly.. I'll work on it and post to this thread later, as well as make a video update about it down the road.
Quote:
Originally Posted by PCHunt
Another approach would be to find nearby experienced builders to take a look, and perhaps pass their experience along to you.
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Actually I have access to some great builders here locally through the local EAA chapter. I'll be seeking their advice for sure.
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05-22-2015, 08:31 AM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by hayabusa
Parts that are back riveted, sure, they`re flat. But even with really nice dimples, it`s almost impossible to get it perfect when you`re riveting the wing skins to the ribs with a gun and bucking bar. Mines got some pillowing of the wing skin between the ribs. Used a C frame and hammer the get those dimples spot on too.
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I somewhat agree, but if you start out with less than ideal dimples, the finish quality is just that much worse.
Pillowing between wing ribs can be caused by a number of other things (that would be an entirely different subject from this discussion). With good tools and technique, even wing skins can look nearly perfectly flat.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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05-22-2015, 08:32 AM
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Join Date: Mar 2009
Location: Chicagoland
Posts: 110
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Quote:
Originally Posted by Palamedes
I'm still kinda upset with myself =(
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Don't sweat it. Like others have said, it's purely cosmetic. Most of us building our first aircraft aren't building award winners.
Half of my tail kit is underdimpled. I plan to vinyl wrap it anyway, and it's likely people won't even be able to notice at that point.
__________________
RV-7 builder
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05-22-2015, 08:34 AM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by PCHunt
Another approach would be to find nearby experienced builders to take a look, and perhaps pass their experience along to you.
Are you building alone? If so, getting advice from fellow builders can result in a quantum leap in your final product.
Most builders are more than willing to help! 
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I very much agree.
The majority of the time, if a first time noob builder finishes a exceptionally nice RV, it is usually because of a lot of involvement with numerous other builders via an EAA chapter, local builders group, etc.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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