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  #1  
Old 07-26-2022, 12:20 PM
Motors Motors is offline
 
Join Date: Mar 2019
Location: Saint James City
Posts: 4
Default Rudder Bottom Mod R-911???

Hey can someone look at these pics? I'm working on a previously owned 7 kit which looks like a mod was done to rudder bottom R-911, adding a wrap around piece of thin... probably .034 Al.

The blind rivets contact the aircraft fuselage aft skin at full rudder deflection, which limits full travel to about 32 degrees. I need to fix the limit restriction and I'm considering removing this piece unless someone knows of a good reason to keep it and make it work.


Thanks

Peter
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  #2  
Old 07-26-2022, 12:48 PM
wirejock's Avatar
wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 5,498
Default

Quote:
Originally Posted by Motors View Post
Hey can someone look at these pics? I'm working on a previously owned 7 kit which looks like a mod was done to rudder bottom R-911, adding a wrap around piece of thin... probably .034 Al.

The blind rivets contact the aircraft fuselage aft skin at full rudder deflection, which limits full travel to about 32 degrees. I need to fix the limit restriction and I'm considering removing this piece unless someone knows of a good reason to keep it and make it work.


Thanks

Peter
It appears they added it because the bottom fairing has been cut away in that area. Remove the piece and the bottom cap and layup a repair with holes where they belong. There's quite a bit of daylight that should be closed up too.
Mine actually slides on from aft so it stops at the base of the rudder horn.
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Larry Larson
Estes Park, CO
E-mail: wirejock at yahoo dot com
Builder Blog: http://wirejockrv7a.blogspot.com
Donated 12/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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  #3  
Old 07-26-2022, 01:14 PM
Taltruda Taltruda is offline
 
Join Date: Oct 2017
Location: Las Vegas, NV
Posts: 1,320
Default

Also it’s better to flip those bolts.. best practice is to have bolts facing down or back if able.
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  #4  
Old 07-26-2022, 01:27 PM
Motors Motors is offline
 
Join Date: Mar 2019
Location: Saint James City
Posts: 4
Default

Thanks Larry,

I was thinking that was what happened. Ok, so I will remove it and either fix it or replace with a new piece from Van's which has a tail light... Hmmm.

Does your rudder bottom rivet to the rear spar, VS-803PP forward of the rudder horn? My plans don't show that, but I thought I should ask it appears that may strengthen the piece. But maybe its not necessary.

Thanks

Peter
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  #5  
Old 07-26-2022, 02:45 PM
wirejock's Avatar
wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 5,498
Default Rudder

Quote:
Originally Posted by Motors View Post
Thanks Larry,

I was thinking that was what happened. Ok, so I will remove it and either fix it or replace with a new piece from Van's which has a tail light... Hmmm.

Does your rudder bottom rivet to the rear spar, VS-803PP forward of the rudder horn? My plans don't show that, but I thought I should ask it appears that may strengthen the piece. But maybe its not necessary.

Thanks

Peter
The plans call for it to slip up from bottom. Mine is trimmed to slip on from aft. I added a lip from the curved forward edge to the spar inside so it's basically sealed. It is held by the rows of pulled rivets along the bottom. None in the spar.
You may find photos on my blog. Finishing pages.
LL
http://wirejockrv7a.blogspot.com
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Estes Park, CO
E-mail: wirejock at yahoo dot com
Builder Blog: http://wirejockrv7a.blogspot.com
Donated 12/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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  #6  
Old 07-27-2022, 05:59 AM
robertahegy's Avatar
robertahegy robertahegy is offline
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Join Date: Jan 2005
Location: East Troy, WI
Posts: 2,003
Default

This is how I trimmed mine.

Roberta

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Last edited by robertahegy : 07-27-2022 at 06:03 AM.
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  #7  
Old 07-27-2022, 06:25 AM
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BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 6,741
Default One thing affects others.

Several things going on there.

1. Builder X probably installed that piece either because the glass was goofed, or because they could not get the glass on/off because of the tail spring. Depending on expectation for fairing removal, you can easily build that glass back up to "factory" and make it look/fit like Roberta's photo.

2. The rudder stops don't look like they are the correct geometry for the riveted TE rudder, make sure that is correct before addressing the swing interference.

3. The fore/aft rudder adjustment with hinges should be verified before implementing a final design conclusion and change. It will affect contact, and I was told if all else was correct just shorten the VS skin. Slightly and carefully of course.

2 cents . . . .

PS:Roberta always did/does beautiful work!!!!
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Last edited by BillL : 07-27-2022 at 06:30 AM.
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  #8  
Old 07-27-2022, 07:17 AM
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Bruce Bruce is offline
 
Join Date: Feb 2006
Location: Anywhere, USA
Posts: 1,255
Default

GROUND AIRPLANE.


YOU ARE MISSING NUTS ON YOUR RUDDER ATTACH.


BOOMER
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Kathy (KAT) Pauley

RV 7A--"MISS MARIE"--- N177WD (SOLD FLYING)72742
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EX -KC-135A -------------BOOM OPERATOR #3633
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  #9  
Old 07-27-2022, 07:49 AM
Scott Hersha Scott Hersha is offline
 
Join Date: Jan 2005
Location: Cincinnati, OH
Posts: 2,362
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Quote:
Originally Posted by Bruce View Post
GROUND AIRPLANE.


YOU ARE MISSING NUTS ON YOUR RUDDER ATTACH.


BOOMER
I saw that too, plus the upside down rudder cable attach bolt with no cotter pin, and figured Motors had removed the rudder, but hadn’t made the finish install until he figured out what to do about the rivet interference.

When you get that fixed, make sure that the rudder deflection doesn’t exceed spec before hitting the stop, lest you end up with holes in your rudder when parked outside on a windy day.
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RV6/2001 built 2000/sold 2005
RV8 Fastback/2008 built/sold 2015
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RV4/bought 2019/sold2021
RV6/August 2022 build - Phase 1
Cincinnati, OH/KHAO
JAN2022
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  #10  
Old 07-27-2022, 09:24 AM
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Mel Mel is offline
 
Join Date: Mar 2005
Location: Dallas area
Posts: 11,507
Default

It's my understanding that this is a project, not a flying airplane.
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EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of EAA Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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