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  #1  
Old 09-15-2017, 10:42 PM
mfleming's Avatar
mfleming mfleming is offline
 
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Location: Joseph, Oregon
Posts: 309
Default Main Spar Countersink

I'm in the process of countersinking the main spar skin rivet holes on the spar web on a RV-7. The countersink depth is set so a dimpled skin will fit.

In the fuel tank area, there are two rivet holes at each main rib location. This is the same as the leading edge area, except the leading edge area has two rivet holes at every location (one for the bottom skin and one for the top skin).

I can't find a call out for the top rivet hole in the tank area. It seems to me that the rivet hole must be countersunk for a AN426AD3-XX rivet.

Van's couldn't say for sure and will be getting back with me on Monday.

What does the collective say?

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Michael Fleming
Joseph, OR
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RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016 (sans fiberglass)
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  #2  
Old 09-15-2017, 10:46 PM
PilotjohnS PilotjohnS is offline
 
Join Date: Jan 2016
Location: Los Angeles
Posts: 565
Default I did

I countersunk those . I did it after the tank was done, so had to take off the tank one more time to do these. See my blogspot or my forum posts of my build on here. (Search pilotjohns on here.) these were done to make the river flush. I would set those rivets before match drilling the skin.(i didnt)
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Last edited by PilotjohnS : 09-15-2017 at 10:49 PM.
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  #3  
Old 09-15-2017, 10:50 PM
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fl-mike fl-mike is offline
 
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Default

Yes, countersink. (Rivet is for rib flange only)
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Mike W
Venice, FL
RV-6A. Mattituck TMX O-360, FP, GRT Sport EFIS
N164WM
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  #4  
Old 09-17-2017, 09:30 PM
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mfleming mfleming is offline
 
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Location: Joseph, Oregon
Posts: 309
Thumbs up

Thanks for the help! Confirms what I suspected.
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Michael Fleming
Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016 (sans fiberglass)
Ailerons and flaps completed 3/2017.
Wings completed 12/2017 (sans fiberglass)
Started on QB fuselage 01/2018
Donated and so should you
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  #5  
Old 12-28-2017, 04:31 PM
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Draker Draker is offline
 
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Default

Michael, did Van's ever get back to you with a specific rivet length call-out for these? I'm curious too, and found no reference in the plans.
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  #6  
Old 12-28-2017, 06:55 PM
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mfleming mfleming is offline
 
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Location: Joseph, Oregon
Posts: 309
Default

Quote:
Originally Posted by Draker View Post
Michael, did Van's ever get back to you with a specific rivet length call-out for these? I'm curious too, and found no reference in the plans.
Boy, expecting me to remember what happened 3 months ago is asking a lot

Van's called back and no, they couldn't find the callout either

They agreed that countersinking was correct but we didn't discuss the rivet length.

I believe I used a 3-3.5.
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Michael Fleming
Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016 (sans fiberglass)
Ailerons and flaps completed 3/2017.
Wings completed 12/2017 (sans fiberglass)
Started on QB fuselage 01/2018
Donated and so should you
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