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  #1  
Old 08-09-2022, 04:30 PM
KellyA KellyA is offline
 
Join Date: Aug 2021
Location: Melfort, Sask, Canada
Posts: 8
Default Proper rivet size

What would the part number be for a blind rivet to fit in a 3/32 hole? I want a few extras to use where a simple AN426AD3-3.5 has a close fit and hard to get a bucking bar under. Thank you in advance. Reason Im asking is, I cannot get my hand with a bucking bar up to the leading edge rivets on the horizontal stabilizer to rivet the skin to the front tip of the rib. I talked to Vans tech support and was told I cannot use a MK319BS rivet in that spot because it is on a RV8 aerobatic airplane. Can I drill it out to 1/8 and use a AD41-ABS blind rivet?

Last edited by KellyA : 08-09-2022 at 05:32 PM. Reason: Need more info in my question
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  #2  
Old 08-09-2022, 05:58 PM
idubrov idubrov is offline
 
Join Date: Mar 2021
Location: San Antonio, TX
Posts: 60
Default

Not sure why you cannot use MK319BS there. It is similar in strength to AD3 (a bit stronger in tensile and much stronger in shear). At least, superficially, based on the numbers I got from random internet sources . AD-41-ABS is actually less strong.

I was confused about all these blind rivets I got in the RV-7 empennage kit, so I collected the data in a table: https://ivan.aero/rivets
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Last edited by idubrov : 09-14-2022 at 09:39 AM.
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  #3  
Old 08-09-2022, 07:58 PM
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wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 5,519
Default CherryMac

Download the CherryMax table. They make #3 flush rivets.
Or
Find a builder nearby who's done it. It can be done.
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Estes Park, CO
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  #4  
Old 08-10-2022, 02:17 AM
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PaulvS PaulvS is offline
 
Join Date: Aug 2019
Location: Western Australia
Posts: 1,209
Default CS4-4

The RV-6 HS has some rivets that are inaccessible for bucking on the middle nose rib on each side and the plans specify CS4-4 rivets at 1.25" spacing for these. Other rivets are generally all AN426AD3-x. The CS4-4 is 1/8 dia but the head is smaller than on AN426AD4 rivet. Maybe this helps.
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  #5  
Old 08-10-2022, 08:54 AM
JeremyL JeremyL is offline
 
Join Date: Aug 2020
Location: Maurertown,Virginia
Posts: 212
Default

Quote:
Originally Posted by KellyA View Post
What would the part number be for a blind rivet to fit in a 3/32 hole? I want a few extras to use where a simple AN426AD3-3.5 has a close fit and hard to get a bucking bar under. Thank you in advance. Reason Im asking is, I cannot get my hand with a bucking bar up to the leading edge rivets on the horizontal stabilizer to rivet the skin to the front tip of the rib. I talked to Vans tech support and was told I cannot use a MK319BS rivet in that spot because it is on a RV8 aerobatic airplane. Can I drill it out to 1/8 and use a AD41-ABS blind rivet?
Legit may be a dumb question but, what bucking bar are you using?
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  #6  
Old 08-10-2022, 11:10 AM
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RV7A Flyer RV7A Flyer is offline
 
Join Date: Jul 2013
Location: US
Posts: 2,757
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Quote:
Originally Posted by wirejock View Post
Find a builder nearby who's done it. It can be done.
Yes, and if someone is deviating from the plans already at the earliest part of the build, I'd suggest that they get someone to help them before proceeding further.

There are literally thousands of 7s and 8s and whatnot out there with solid rivets in the HS leading edge...just sayin'.
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  #7  
Old 08-10-2022, 12:00 PM
idubrov idubrov is offline
 
Join Date: Mar 2021
Location: San Antonio, TX
Posts: 60
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Quote:
Originally Posted by RV7A Flyer View Post
There are literally thousands of 7s and 8s and whatnot out there with solid rivets in the HS leading edge...just sayin'.

That is true, but also I think it would be helpful to understand what is (structurally) wrong with MK-319-BS where. I don't have RV-8 plans, and I might be misunderstanding which part we are talking about, but RV-7 plans explicitly allow MK-319-BS on the bottom side. See attached image.
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  #8  
Old 08-10-2022, 08:12 PM
David Z David Z is offline
 
Join Date: Aug 2010
Location: Thunder Bay Ontario
Posts: 940
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Most pulled rivets have lower strength than solid rivets. Not always the case, but generally so.
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  #9  
Old 08-11-2022, 01:45 PM
KellyA KellyA is offline
 
Join Date: Aug 2021
Location: Melfort, Sask, Canada
Posts: 8
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Thanks a lot everyone. I ended up finding my plans sheet for the horizontal stabilizer (stored away while finishing other tail sections and waiting on inspection). The plans do call for MK-319-BS on the front of HS708 rib. So I ordered 50 rivets from Vans and also ordered CCC-32 rivets from Aircraft Spruce which are very close to specs on the MK rivet and one-third the price.
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  #10  
Old 08-11-2022, 03:25 PM
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RV7A Flyer RV7A Flyer is offline
 
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Location: US
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Quote:
Originally Posted by KellyA View Post
the front of HS708 rib.
708? That's the main rib. Did you mean 707?
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