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02-16-2012, 12:04 AM
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Join Date: Mar 2007
Location: 45G, Brighton, MI
Posts: 1,867
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Elevator Trim Spar/Root Rib Countersinks?
I'm working on page 6-10 of the RV-7 manual and DWG 4, left elevator. Near the bottom of page 6-10 I'm instructed to machine countersink either the forward face of the E-705 root rib or the aft face of the E-606PP trim spar. The drawing calls for #3 flush rivets, but I noticed that I've already drilled the two holes to #30 (like just about every other rib-to-spar rivet hole in the project so far).
Since the instructions say either side can be countersunk, I'm assuming that flush rivets are not really required, and they're only flush because they'd be the only two #3 universal rivets in the empennage. Can I just use #4 universal head rivets here, or should I use NAS1097AD4 reduced head rivets, or should I get new parts? Edge distance on both parts is about 7/32".
__________________
Miles (VAF# 1238, Paid up as of 2018)
RV-7 TU 904KM (reserved)
Wings Fitted and Finish Kit on site
Construction Log
Picasa: Empennage Album, Wings Album, Fuselage Album
1955 Cessna 170B flying since 1982
'To get something you never had, you have to do something you never did.' -Unk.
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02-16-2012, 06:30 AM
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Join Date: Feb 2005
Location: Chesterfield, Missouri
Posts: 4,514
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Miles, the -8 instructions are the same in this area.
The aft face of 606PP becomes the resting area of the securing the trim tab hinge pin. I do not think it matters what rivets go in there, just keep the aft surface as flat as possible. I'd go with the small head (opps) -4 rivet and squeeze it together. For sure you do not need to order new parts.
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RV-12 Build Helper
RV-7A...Sold #70374
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02-16-2012, 09:44 AM
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Join Date: Mar 2007
Location: 45G, Brighton, MI
Posts: 1,867
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Thanks David,
The hinge pin was the only possible interference I saw too. I was hoping that maybe I could bend the end of the pin so it wouldn't interfere with AN470AD4 rivet heads, but I didn't have much time last night to take a close look at that option. The NAS1097 rivet solution bothers me a little due to the small bearing area on the factory head, but if the joint is designed for #3 rivets in the first place, maybe it's OK. I emailed the same queston to Van's support and should get a reply before the end of the day.
Thanks again for your reply,
__________________
Miles (VAF# 1238, Paid up as of 2018)
RV-7 TU 904KM (reserved)
Wings Fitted and Finish Kit on site
Construction Log
Picasa: Empennage Album, Wings Album, Fuselage Album
1955 Cessna 170B flying since 1982
'To get something you never had, you have to do something you never did.' -Unk.
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04-01-2012, 05:33 AM
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Join Date: Feb 2011
Location: Brisbane, Australia
Posts: 37
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Did you guys receive a longer piece of piano hinge than what was required for the trim tab?
Mine was 3/8 over size and the hinge pin is no where near long enough to bend and secure as per the drawings.
I have the 3/8 of pin sticking out when it`s installed all the way.
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04-01-2012, 07:56 AM
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Join Date: Mar 2007
Location: 45G, Brighton, MI
Posts: 1,867
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Quote:
Originally Posted by hayabusa
Did you guys receive a longer piece of piano hinge than what was required for the trim tab?
Mine was 3/8 over size and the hinge pin is no where near long enough to bend and secure as per the drawings.
I have the 3/8 of pin sticking out when it`s installed all the way.
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I seem to remember a note in either the instructions or plans that a longer pin is included in the fuselage kit. I hope to know for sure in a week or so...
__________________
Miles (VAF# 1238, Paid up as of 2018)
RV-7 TU 904KM (reserved)
Wings Fitted and Finish Kit on site
Construction Log
Picasa: Empennage Album, Wings Album, Fuselage Album
1955 Cessna 170B flying since 1982
'To get something you never had, you have to do something you never did.' -Unk.
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04-15-2012, 10:23 AM
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Join Date: Apr 2012
Location: Indonesia
Posts: 6
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elevator trim assembly
does anybody know about the trim tab assembly drilled hole was not align? I'm building the trim and found out that all the pre drilled hole was not match ? anybody had the same problem ? do I need to make new hole for the rivet ?
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04-15-2012, 10:41 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Welcome to VAF!!!!
Bodhi, welcome to the good ship VAF 
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Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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04-15-2012, 06:19 PM
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Join Date: Apr 2012
Location: Indonesia
Posts: 6
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elevator trim assembly
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