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  #1  
Old 09-05-2019, 07:29 PM
subpar_bucker subpar_bucker is offline
 
Join Date: Oct 2016
Location: Cranberry Twp, PA
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Default About to countersink the canopy front bow holes

Just want to double check because I cannot find this via google. The AACQ-4-4 rivet countersink angle is 100 degrees correct?
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  #2  
Old 09-06-2019, 06:57 AM
John-G John-G is offline
 
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Subpar-

It has been a while but if memory serves me correctly, I believe the AACQ-4-4 rivet has a 120° angle.

You could easily verify that by countersinking a piece of scrap metal using a 120° countersink then cut it in half with a band saw .... then verify the sides of the rivet mate nicely with the sides of the countersink.
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Old 09-06-2019, 09:57 AM
JwWright57 JwWright57 is offline
 
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Good suggestion John
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  #4  
Old 09-06-2019, 10:24 AM
dreed dreed is offline
 
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big second on using scrap to verify. you can check the angle and get the microstop set perfectly
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  #5  
Old 09-06-2019, 11:30 AM
kkmarshall kkmarshall is offline
 
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I believe all the pulled c/s rivets use a 120 degree.
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Old 09-06-2019, 12:59 PM
rcarsey rcarsey is offline
 
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I just completed this step a few days ago and I confirmed it was 120 degrees by looking at the datasheet for it.. I had the same question.

http://www.avdel-global.com/fileadmi...LQ_AACQ_mm.pdf
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  #7  
Old 09-06-2019, 07:01 PM
subpar_bucker subpar_bucker is offline
 
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Thanks for all the replies everyone!
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  #8  
Old 09-06-2019, 07:42 PM
AeroDog AeroDog is offline
 
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Quote:
Originally Posted by kkmarshall View Post
I believe all the pulled c/s rivets use a 120 degree.
If all the pulled CS rivets are 120 degrees, which rivets are 100 degrees? I'm thinking there may have been times when I used the wrong countersink cutter. Nothing ever looked wrong after it was set, however.

Jerre
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  #9  
Old 09-06-2019, 08:58 PM
rv9builder rv9builder is offline
 
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Quote:
Originally Posted by AeroDog View Post
If all the pulled CS rivets are 120 degrees, which rivets are 100 degrees? I'm thinking there may have been times when I used the wrong countersink cutter. Nothing ever looked wrong after it was set, however.

Jerre
Solid AN rivets are 100 degrees (AN426AD-3-4, for example)
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  #10  
Old 09-07-2019, 07:18 AM
John-G John-G is offline
 
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Quote:
Originally Posted by kkmarshall View Post
I believe all the pulled c/s rivets use a 120 degree.
Regarding the pulled rivets used on the RV-12 .... actually, there are some exceptions to the above statement. In particular, one that immediately comes to mind is the use of CCR264SS-3-2 rivets to secure dimpled nutplates ... their heads have a 100° taper. One example of their use is where a rivet squeezer does not have the clearance to squeeze a solid rivet ... such as the upper nutplate riveted onto the flange of a F-1215 seat rib.
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Last edited by John-G : 09-07-2019 at 07:36 AM.
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