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05-09-2017, 10:08 AM
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Join Date: Aug 2016
Location: North Fort Myers
Posts: 247
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wrong rivets used in Skin/Spar
I am building my 9a HS and somehow used 426AD3 3.5 ( skin to ribs)
than 426ad3- 4 (skin to spar )
I only did the left skin before noticing and I bucked riveted this thing fairly well..
they look great, but you can see on the right side with the correct rivet has more meat to it>>
should I start drilling?
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Neal Trombley
SW Florida
EAA 66
N517NC ( reserved)
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July 2017
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05-09-2017, 10:28 AM
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Join Date: Jan 2016
Location: Southwest
Posts: 1,108
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Dont do it!
Ok if you have a rivet guage, i would check them with a guage first. If they are still under spec. DON'T PANIC. The real requirement is a mil spec that allows for more tolerance. I would contact Vans if you still think you need to drill out.
What i have found is a drilled out rivet is ugly, especially when you have to do so many. Please psot a picture.
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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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05-09-2017, 10:39 AM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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Use the rivet spec here - it's the one Vans "borrowed"  - and measure using the picture on the link.
http://web.archive.org/web/200008161...ash.net/~gila/
If the height and width of the shop heads are within spec, don't touch them.
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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05-09-2017, 10:48 AM
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Join Date: Aug 2016
Location: North Fort Myers
Posts: 247
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[IMG]  [/IMG]
[IMG]
 [/IMG]
[IMG]  [/IMG]
The three pics
First is correct
2nd and 3rd are incorrect
__________________
Neal Trombley
SW Florida
EAA 66
N517NC ( reserved)
Dues Paid
NOV 2016
July 2017
Dec 2017
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05-09-2017, 10:57 AM
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Join Date: Aug 2016
Location: North Fort Myers
Posts: 247
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I emailed VAns as well.
Thank you
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Neal Trombley
SW Florida
EAA 66
N517NC ( reserved)
Dues Paid
NOV 2016
July 2017
Dec 2017
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05-09-2017, 11:00 AM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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No dimples involved so measurements are easy.
Check the ones you think are bad, if they are over 0.038" high and more than 0.122" diameter they are good to go.
If not, since there is a whole row, not just a few interspersed, then they should be replaced. Search VAF for rivet removal procedures.
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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05-09-2017, 11:01 AM
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Join Date: Aug 2016
Location: North Fort Myers
Posts: 247
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Quote:
Originally Posted by az_gila
No dimples involved so measurements are easy.
Check the ones you think are bad, if they are over 0.038" high and more than 0.122" diameter they are good to go.
If not, since there is a whole row, not just a few interspersed, then they should be replaced. Search VAF for rivet removal procedures.
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Thank you Gil
I will measure and take note..
__________________
Neal Trombley
SW Florida
EAA 66
N517NC ( reserved)
Dues Paid
NOV 2016
July 2017
Dec 2017
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05-09-2017, 01:24 PM
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Join Date: Mar 2008
Location: Dublin, CA
Posts: 1,259
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There are some go-no go rivet gauges that are very helpful for quick measurements. If you don't have a set you should get one. I might have gotten mine from Avery (which doesn't exist any more), but Cleaveland Tools probably has them.
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Ray Tonks
2020 Donation Paid
Titan IOX-370, Dual PMAGs, 9.6:1 Pistons, FM-150
RV-7 Fuselage in progress
* Cabin Interior - In progress
RV-7 SB Wings
* Both Wings fully skinned
* Fuel Tanks Complete - No leaks finally
* Ailerons Complete
* Flaps Complete
RV-7 Empennage - Complete (a little fiberglass work left)
Vans Training Kit # 2 - Complete
RV-7 Preview Plans
Vans Training Kit #1 - Complete
EAA Sheet Metal Class - Complete
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05-09-2017, 02:21 PM
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Join Date: Jan 2016
Location: Southwest
Posts: 1,108
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Photos help
Some of these look too thin as best I can tell and probably wont pass the go no-go guages. But listen to Gil, measure them because i believe the Go No-go gauges are very conservative. measuring is the ultimate test. The spec Gil refers to allows for a little more than 1/3 dia shop head height, where most rivet guagez are 1/2 shop head height. ( Please do not take my word for this, but decide on your own)
__________________
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
Last edited by PilotjohnS : 05-09-2017 at 02:29 PM.
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05-09-2017, 03:02 PM
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Join Date: Aug 2016
Location: North Fort Myers
Posts: 247
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I agree on the thin ones.
I replaced all the ones that failed.
__________________
Neal Trombley
SW Florida
EAA 66
N517NC ( reserved)
Dues Paid
NOV 2016
July 2017
Dec 2017
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