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02-11-2014, 10:31 AM
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Join Date: Oct 2007
Location: Boston Area
Posts: 284
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Frustration Ensues
Continuing my tail for the 9A for now, but running into what I would call beginner issues.
Has anyone else run into frustration with bucking (or squeezing) the rivets on the powder coat brackets on the VS pieces (I assume it will be the same on the HS)? I end up with bent over rivets as if they were too long to begin with or perhaps my technique is poor.
I am using a pneumatic squeezer, but for the rivets in the center of the bracket closest to the bend I use the gun with a tungsten bar. On the builder sites I don't typically see these called out as problematic but they seem to consistently dump on me. I have seen others call out problems with rivet lengths that are too long but I assumed the plans would have been corrected by now. If I ever have the means to switch over to the 14 I wonder if they fixed those issues as many of these tail parts are the same.
I am venting a bit perhaps I need to just practice my riveting more to get more consistent results.
__________________
Jeff
RV-14A
Status: Wings complete(ish), Working on: Empennage. Fuselage kit on order
Location:MA
http://vans14a.blogspot.com/
Last edited by JDBoston : 02-11-2014 at 01:26 PM.
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02-11-2014, 10:56 AM
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Join Date: May 2012
Location: Harrisburg, Pa
Posts: 759
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Just to be clear - you're saying the rivet is, in fact, the right length? Not saying what is called out, but that you actually measured?
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02-11-2014, 11:14 AM
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Check length
Do not assume the plans call out correct rivet length. If they are bending over most likely they are too long. See http://www.old.bd-4.org/rivetsel.php
Use 1.5 D rule.
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02-11-2014, 11:15 AM
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rivets
After doing this for 38 years I just eyeball them.
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02-11-2014, 11:29 AM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,516
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I just made a tool from scrap (you need some) .063 and took a file and put a notch in the order to measure the 1.5 height. It takes 5 min, and it will train your eye in less than 38 years.
Another thing - on my 3" no-hole yoke, if the rivet is not in the center the nose WILL TWIST and can easily push over a rivet. Check that on some scrap too.
Happy building!
__________________
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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02-11-2014, 11:46 AM
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Join Date: Oct 2012
Location: Clearwater, FL KCLW
Posts: 1,281
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Try a size smaller rivet, then see if it meets the specs after you set it. Eventually you will get pretty good at eyeballing proper rivet length, and there are places where you may need to deviate from callouts for various reasons, such as repairs, and areas where multiple, primed pieces may be a bit thicker than normal.
It gets easier!
Chris
__________________
Chris Johnson
RV-9A - Done(ish) 4/5/16! Flying 4/7/16
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02-11-2014, 11:47 AM
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Join Date: Jan 2005
Location: KPYM
Posts: 2,686
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Jeff,
I will be having a number of builders visiting my project sometime real soon. I can let you know what that sate is once it is determined.
If you stop by, we can discuss technique.
Also, bring some parts and we can assemble them then as well! If you could bring some tools... That would be fine too.
Come on down!
 CJ
__________________
RV-7 Flying - 1,200 Hours in 5 Years!
The experiment works!
TMX-IO-360, G3i ignition & G3X with VP-X
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02-11-2014, 11:48 AM
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Join Date: Jan 2007
Location: Battleground
Posts: 4,348
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Make sure your work is very firmly clamped and supported.
__________________
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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02-11-2014, 11:55 AM
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Join Date: Oct 2005
Location: Highland Village, TX
Posts: 1,520
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I use a rivet length gauge like this one: http://www.averytools.com/prodinfo.asp?number=1008 all the time - my eyeball is not that good.
__________________
Rick Aronow,
A&P
Flying 7A Slider;
RV-12 SOLD
Jacksonville, FL
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02-11-2014, 12:27 PM
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Join Date: Nov 2010
Location: Lac du Flambeau, Wisconsin
Posts: 16
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+1 For clamping the assembly
I had some of the same problems at the beginning. I'm not sure if this will help, but I found out that the assembly has to be securely clamped. Also, I have to keep a stiff two handed grip on the squeezer. If either the assembly or the squeezer moves out of alignment, the rivet will clinch every time.The same holds true for using my rivet gun. The more securely I clamp my work, the better the results.
__________________
Roger Grahl
Lac du Flambeau, WI
RV-9A Slider
Empennage - Completed
Wings - Completed
Fuselage - Completed
Finish Kit - Under Construction
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