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POSTING RULES

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View Poll Results: # of rudder wedges (from Avery) to center the ball at cruise
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None
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7 |
17.95% |
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.5
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2 |
5.13% |
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1
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13 |
33.33% |
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1.5
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8 |
20.51% |
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2
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9 |
23.08% |

08-28-2012, 07:58 PM
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Join Date: Mar 2005
Location: Sandpoint, Idaho
Posts: 104
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Rudder wedge
Before we built out RV-4 I had looked at a lot of RV's at Arlington and most all had trim tabs for right rudder. From my RC model days of pattern competion planes we adjusted right thrust and down thrust to get proper trimming. When we built the 4 I added 1/2 degree of right thrust before installing the cowl. Ball stays centered and no trim tab. Has anyone thought of this for the 12?
TED
Sonerai modified 125 Lyc. 1977
RV-4 2007 280 hobbs
120293 Jabiru 3300 50 percent
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08-28-2012, 08:43 PM
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Join Date: Aug 2010
Location: Marshall TX (KASL)
Posts: 1,783
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Not practical for the 12, even if done EAB in my opinion. The motor mounts are not adjustable except by maybe sliding shims under them in a trial and error way. That would affect prop clearance with the cowl and maybe some other stuff. This would be maybe 50 times more difficult than simply sticking on the wedge!
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09-26-2012, 09:49 PM
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Super Moderator
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Join Date: Dec 2005
Location: Salt Lake City, Utah
Posts: 1,158
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Tested 2 wedges
I tested 2 full wedges from Avery tonight and it appeared to work perfect for a TAS around 112.
__________________
Scott Schmidt
Salt Lake City, UT
RV-10 N104XP (1280 Hours)
RV-12 N321UT (Sold)
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09-27-2012, 05:59 AM
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Join Date: Jun 2009
Location: Dayton, OH
Posts: 838
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1 3/4
143WM has 1 3/4 Avery wedges, could probably use q full 2.
Wayne 120241
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09-27-2012, 11:24 AM
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Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,820
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I installed conventional trim tabs on the rudder and ailerons. It made life much simpler!
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09-27-2012, 12:04 PM
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Join Date: Jul 2006
Location: Eagle, Id
Posts: 102
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Trim tabs
Regarding mounting the trim tab: I used "removable" double side scotch tape while tuning in the size of the tab and then mounted it permanantly with "non-removable" double side scotch tape. Mine's been on there for five years and the guy who suggested it to me has had his on there much longer.
It works for me.
__________________
Steve Hamer
RV-6
Eagle, ID
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09-29-2012, 07:03 PM
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Join Date: Apr 2011
Location: Dayton, VA
Posts: 53
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pictures of wedge
Could someone post pictures of the Wedge installed on at different locations?
Thanks! Oren
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09-30-2012, 06:13 AM
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Join Date: Nov 2008
Location: Gloversville, NY
Posts: 1,587
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Picture of wedge placement
Go here for picture. My rudder lock is also on that page.
__________________
John Peck, CFII, A&P, EAA Tech Counselor, Flight Advisor.
?Master Pilot? Award, UFO Member.
RV-12 N37JP 120176 Flying since 2012.
One Week Wonder Build Team, OSH 2018.
VAF paid through 10/2019.
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09-30-2012, 10:07 AM
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Join Date: Oct 2010
Location: Elkton, Md.
Posts: 1,652
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Quote:
Originally Posted by Ted Farmin
Before we built out RV-4 I had looked at a lot of RV's at Arlington and most all had trim tabs for right rudder. From my RC model days of pattern competion planes we adjusted right thrust and down thrust to get proper trimming. When we built the 4 I added 1/2 degree of right thrust before installing the cowl. Ball stays centered and no trim tab. Has anyone thought of this for the 12?
TED
Sonerai modified 125 Lyc. 1977
RV-4 2007 280 hobbs
120293 Jabiru 3300 50 percent
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I think it would be a good idea and easy to do as long as the cowling is trimmed and fitted after the engine install.
__________________
Wag Aero Sport Trainer built,sold and wrecked
N588DF RV12 #336 built, sold and alive and well in New York
N73DF RV12 #244 built, sold and alive and well in Florida
N91 RV RV9 I wish I could say I built this one! Mark Santoleri hit the ball out of the park on this gem.
Currently restoring a 1978 Citabria GCBC
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