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01-01-2019, 07:14 AM
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Join Date: Mar 2015
Location: Greenville, SC
Posts: 24
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HS spar scratches RV 9
finished match drilling my ribs to the spars on my horizontal stabilizer. When I disassembled and removed the blue plastic, I found these shallow scratches. I believe they came from the brake used in bending the spars in the manufacturing process. The blue plastic was also cut along these scratches. I used mineral spirits to clean the scratches to remove the plastic residue and the photos show what remains. These scratches are very shallow but I can feel them with my fingernail.
https://photos.app.goo.gl/3mi8ho4cX7mFYNrT9
Suggestions?
Last edited by DeltaRomeo : 01-02-2019 at 04:13 PM.
Reason: Add photo
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01-01-2019, 09:30 AM
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Join Date: Oct 2009
Location: Victoria, BC, Canada
Posts: 3,926
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No photo visible...
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Rob Prior
1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
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01-01-2019, 09:56 AM
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Join Date: Mar 2015
Location: Greenville, SC
Posts: 24
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01-01-2019, 10:31 AM
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Join Date: Jan 2005
Location: Irvine, CA
Posts: 872
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I received parts with similar marks, and the blue plastic was also cut. Since several parts had the same kind of marks, I assumed this was normal and they were OK to use.
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Mark
RV-12iS Fuselage
RV-9A Project: Sold
VAF donation made for 2020
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01-01-2019, 11:06 AM
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Join Date: Aug 2013
Location: Darwin, MN
Posts: 70
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I?d say that looks normal.
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Ryan
RV-9A
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01-01-2019, 12:31 PM
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Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,931
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Scratches
Pretty common. Scuff them smooth with scotchbrite so there's no sharp edges.
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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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01-01-2019, 02:02 PM
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Join Date: Jul 2017
Location: Carson City, NV
Posts: 120
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what wirejock said, to fix.
remember you are RELIEVING potential edges - not polishing it out [don't take the alclad any more than can be helped].
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Ben K.
A&P; RLSA - A,G,W/S Falco F-8L
50 yrs of flight and counting
Dues paid 2017 thru 2020
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01-01-2019, 03:42 PM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,514
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__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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01-01-2019, 04:17 PM
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Join Date: Oct 2008
Location: Schaumburg, IL
Posts: 2,053
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Just leave it alone. It's fine. Just alclad. Of course a quick call to Van's will put your mind at ease.
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Tony Phillips
N524AP, RV 9 (tail wheel)
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01-01-2019, 04:31 PM
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Join Date: Aug 2014
Location: Edmonton, AB
Posts: 216
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Very common and normal. Once you start handling enough alclad parts and you will see how easy the pure aluminum layer is to scratch. Remember though a scratch that can catch your fingernail isn't good. Like wirejock says buff with scotchbrite until there is no sharp edges. Not sure if you are choosing to prime (not wanting to start primer wars) but buff and prime takes care of a lot of these things.
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