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01-24-2014, 11:42 AM
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Join Date: Dec 2008
Location: League city, TX
Posts: 544
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Aileron bracket rivet interference
After rechecking the plans several times I can't see how this is right. The plans call for the outboard aileron hinge bracket to be countersunk and an AN426-4-7 rivet to be installed with the flush side on the outboard bracket. When the ailerons are installed per the plans with all the washers in place, I only have about a 32nd of an inch of clearance when the aileron rotates between the shop head and the aileron bracket installed on the aileron itself. If the head were to be installed in the other direction there would have been almost 1/4 inch of distance between the outboard aileron bracket and the shop head of the rivet. See pics. Has anyone run into this? My fix so far has been to relocate the washers for more clearance.
__________________
Mark Malone, RV7
Wings complete, SB 14 complied with, canopy and cowling in progress, Up on the gear.
N442MM reserved
http://www.mykitlog.com/MikeMike
2020 Donation gladly paid..
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01-24-2014, 12:22 PM
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Join Date: Nov 2005
Location: Snohomish, Washington
Posts: 699
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Quote:
Originally Posted by Maxrate
After rechecking the plans several times I can't see how this is right. The plans call for the outboard aileron hinge bracket to be countersunk and an AN426-4-7 rivet to be installed with the flush side on the outboard bracket. When the ailerons are installed per the plans with all the washers in place, I only have about a 32nd of an inch of clearance when the aileron rotates between the shop head and the aileron bracket installed on the aileron itself. If the head were to be installed in the other direction there would have been almost 1/4 inch of distance between the outboard aileron bracket and the shop head of the rivet. See pics. Has anyone run into this? My fix so far has been to relocate the washers for more clearance.
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Looking at my preview plans it appears the washers are installed wrong in the picture. The side with 2 washers should be on the aileron side and will increase the distance from the rivet head to the aileron bracket. It also appears the bracket is running at an angle to the aileron which also supports my conclusion about the washers.
__________________
Don Jones
Technical Support Manager
Dynon Avionics
CFI-IA, AGI, IGI
RV9-A
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01-24-2014, 12:42 PM
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Join Date: Sep 2007
Location: BC
Posts: 1,674
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This is fun isn't it! There's more coming, enjoy the process.
Bevan
__________________
RV7A Flying since 2015
O-360-A1F6 (parallel valve) 180HP
Dual P-mags
Precision F.I. with AP purge valve
Vinyl Wrapped Exterior
Grand Rapids EFIS
Located in western Canada
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01-24-2014, 12:44 PM
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Join Date: Jan 2005
Location: Boise, ID
Posts: 1,007
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Van's Goof
This is one place better not to follow the plans. Drill 'em out and countersink for double flush rivets. You may want to reposition the aileron for various reasons. Ridding both surfaces of the bracket of shop heads gives you best flexibility and no potential for interference with flight controls.
John Siebold
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01-24-2014, 01:04 PM
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Join Date: Dec 2008
Location: League city, TX
Posts: 544
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Quote:
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Looking at my preview plans it appears the washers are installed wrong in the picture. The side with 2 washers should be on the aileron side and will increase the distance from the rivet head to the aileron bracket
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Don, referencing drawing 13A for the RV7 section B-B shows the washers as I have them installed. It does say in the note (Adjust washers as Req'd for proper fit) I guess I just need to relocate the washers for more clearance. I might have to resort to double flush riveting before this will give me a final warm fuzzy though.
__________________
Mark Malone, RV7
Wings complete, SB 14 complied with, canopy and cowling in progress, Up on the gear.
N442MM reserved
http://www.mykitlog.com/MikeMike
2020 Donation gladly paid..
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01-24-2014, 01:16 PM
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Join Date: Dec 2011
Location: Lawrenceville, Georgia
Posts: 315
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This is a fun one!!!! It took me a week of debating & several conversations with other builders (&Van's) before I countersunk anything on these darn brackets. I believe these are correct & your washer count is just out.
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01-24-2014, 01:18 PM
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Join Date: Jun 2005
Posts: 846
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brackets
I had the same problem but for a different reason I wanted my wings as far back as possible and that made my flaps to aileron gap tight and I need aileron as far outboard as possible so it was hitting rivet with bracket so I drilled out the rivet and installed #3 bolt with a short aluminum tubing spacer to the inside and it became my aileron stops by doing this on each side works like a champ.
Bob
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01-25-2014, 08:36 AM
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Join Date: Dec 2008
Location: League city, TX
Posts: 544
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Fix
__________________
Mark Malone, RV7
Wings complete, SB 14 complied with, canopy and cowling in progress, Up on the gear.
N442MM reserved
http://www.mykitlog.com/MikeMike
2020 Donation gladly paid..
Last edited by Maxrate : 01-25-2014 at 09:53 AM.
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01-25-2014, 10:53 AM
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Join Date: Nov 2012
Location: Half Moon Bay, CA
Posts: 1,035
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Double flush!
I just went through the same conversation with Sterling and Van's ... he said the outboard sides of the bracket are countersunk, but I love the suggestion do 'em double flush. I'm building mine that way!
__________________
Bill Bencze
N430WB RV-7 #74152 @ KHAF, tip-up; IO-360-M1B; Hartzell CS. !! Phase 1 !!
2357 hrs over 8.5 years to get to flying. Log at: http://rv7.wbencze.com
VAF 2020 donation happily made
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