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View Poll Results: # of rudder wedges (from Avery) to center the ball at cruise
None 7 17.95%
.5 2 5.13%
1 13 33.33%
1.5 8 20.51%
2 9 23.08%
Voters: 39. You may not vote on this poll

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  #11  
Old 08-28-2012, 07:58 PM
Ted Farmin Ted Farmin is offline
 
Join Date: Mar 2005
Location: Sandpoint, Idaho
Posts: 104
Default 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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  #12  
Old 08-28-2012, 08:43 PM
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Bill_H Bill_H is offline
 
Join Date: Aug 2010
Location: Marshall TX (KASL)
Posts: 1,783
Default

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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  #13  
Old 09-26-2012, 09:49 PM
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ScottSchmidt ScottSchmidt is offline
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Join Date: Dec 2005
Location: Salt Lake City, Utah
Posts: 1,158
Default Tested 2 wedges

I tested 2 full wedges from Avery tonight and it appeared to work perfect for a TAS around 112.
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Salt Lake City, UT

RV-10 N104XP (1280 Hours)
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  #14  
Old 09-27-2012, 05:59 AM
yankee-flyer yankee-flyer is offline
 
Join Date: Jun 2009
Location: Dayton, OH
Posts: 838
Default 1 3/4

143WM has 1 3/4 Avery wedges, could probably use q full 2.

Wayne 120241
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  #15  
Old 09-27-2012, 11:24 AM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,820
Default

I installed conventional trim tabs on the rudder and ailerons. It made life much simpler!
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  #16  
Old 09-27-2012, 12:04 PM
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shamer shamer is offline
 
Join Date: Jul 2006
Location: Eagle, Id
Posts: 102
Default 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.
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RV-6
Eagle, ID
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  #17  
Old 09-29-2012, 07:03 PM
orenjr orenjr is offline
 
Join Date: Apr 2011
Location: Dayton, VA
Posts: 53
Default pictures of wedge

Could someone post pictures of the Wedge installed on at different locations?
Thanks! Oren
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  #18  
Old 09-30-2012, 06:13 AM
BigJohn BigJohn is offline
 
Join Date: Nov 2008
Location: Gloversville, NY
Posts: 1,587
Default Picture of wedge placement

Go here for picture. My rudder lock is also on that page.
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RV-12 N37JP 120176 Flying since 2012.
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  #19  
Old 09-30-2012, 10:07 AM
Dave12 Dave12 is offline
 
Join Date: Oct 2010
Location: Elkton, Md.
Posts: 1,652
Default

Quote:
Originally Posted by Ted Farmin View Post
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
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.
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