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  #1  
Old 09-15-2017, 10:42 PM
mfleming's Avatar
mfleming mfleming is offline
 
Join Date: Sep 2016
Location: Joseph, Oregon
Posts: 99
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
sagriver at icloud dot com

RV-7 Slider #74572
Empennage (sans fiberglass), ailerons and flaps complete.
Working on wing and fuel tanks.
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  #2  
Old 09-15-2017, 10:46 PM
PilotjohnS PilotjohnS is offline
 
Join Date: Jan 2016
Location: Los Angeles
Posts: 346
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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John S

WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for thier use.

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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
 
Join Date: Jul 2005
Posts: 861
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
N184WM reserved (RV-8)....tail kit done, slow-build wing done, slow-build fuselage started.
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  #4  
Old 09-17-2017, 09:30 PM
mfleming's Avatar
mfleming mfleming is offline
 
Join Date: Sep 2016
Location: Joseph, Oregon
Posts: 99
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
Empennage (sans fiberglass), ailerons and flaps complete.
Working on wing and fuel tanks.
Donated 2017
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