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Rudder Trim

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Robin Marks

Joined: 10 Jan 2006
Posts: 24
Location: San Luis Obispo, CA

Posted: Sun Feb 05, 2006 9:18 am Post subject: Rudder Trim

I have a 6A with no Rudder Trim. I have seen foam style wedges that are

applied to the lifting surface to act as fixed trim surfaces. I do not

know what the material is, what the best angles are and how they are

affixed onto the surface. I assume this has been discussed at length in

the archives. Can anyone give me a lead to what they are called as I

have looked in the archives but I don't think I am searching the proper

terms and there are a lot of listings on trim?



Thanks,



Robin



RV-6A - Needs Right  Rudder



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_________________
RV-4 Sold
RV-6A 0-360 - C/S Flying

ronlee(at)pcisys.net
Guest

Posted: Sun Feb 05, 2006 9:42 am Post subject: Rudder Trim

 	  Quote: 	
		  I have a 6A with no Rudder Trim. I have seen foam style wedges that are

applied to the lifting surface to act as fixed trim surfaces. I do not

know what the material is, what the best angles are and how they are

affixed onto the surface. I assume this has been discussed at length in

the archives. Can anyone give me a lead to what they are called as I

have looked in the archives but I don't think I am searching the proper

terms and there are a lot of listings on trim?


	


I just cut a piece of ordinary foam, perhaps two inches long at my

eye-balled engineered angle and duct taped it on.  It is temporary

until I decide what I really want.



I could get 3M double-sided tape, make it out of fiberglass, etc

but that will come later.  It works for now.



Ron Lee



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rhdudley(at)att.net
Guest

Posted: Sun Feb 05, 2006 10:31 am Post subject: Rudder Trim

Hi Robin,

I have not seen any dimensions or specifications in postings on the 

list. I have seen lots of RVs with wedges on the left side of their 

rudders. They often are made of aluminum or wood. When I began testing 

my -6A there was and obvious need for rudder trim. My solution was 

trailing edge balsa made for model airplanes that I found at a hobby 

shop. My procedure was to cut an arbitrary length of this material as a 

starting point. I believe that I started with 10 inches. I taped it onto 

the left trailing edge with the thickest part of the wedge aft using 

duct tape. The 10 inches turned out to be too much. So, I cut it in half 

and tried again. After several iterations, I ended up with about 6 

inches length. I then finished a 6" length with the paint I used on the 

plane and attached it with double stick foam tape. It has been in place 

for about 60 hours and the ball is in the center at cruise speeds.

Hope this helps.



Richard Dudley

-6A 75 hours



Robin Marks wrote:



 	  Quote: 	
		  



I have a 6A with no Rudder Trim. I have seen foam style wedges that are

applied to the lifting surface to act as fixed trim surfaces. I do not

know what the material is, what the best angles are and how they are

affixed onto the surface. I assume this has been discussed at length in

the archives. Can anyone give me a lead to what they are called as I

have looked in the archives but I don't think I am searching the proper

terms and there are a lot of listings on trim?



Thanks,



Robin



RV-6A - Needs Right  Rudder



Do Not Archive

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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Rick Galati

Joined: 10 Jan 2006
Posts: 91
Location: Lake St. Louis MO.

Posted: Sun Feb 05, 2006 11:38 am Post subject: Re: Rudder Trim

 	  Robin Marks wrote: 	
		  I have a 6A with no Rudder Trim. I have seen foam style wedges that are

applied to the lifting surface to act as fixed trim surfaces. I do not

know what the material is, what the best angles are and how they are

affixed onto the surface. I assume this has been discussed at length in

the archives. Can anyone give me a lead to what they are called as I

have looked in the archives but I don't think I am searching the proper

terms and there are a lot of listings on trim?Thanks, Robin RV-6A - Needs Right  Rudder Do Not Archive 	




Robin



Here is the link and the description of wedge I use with great success.



http://www.epm-avcorp.com/trimtabinst.html



Here is a detail photograph of my installation:

http://www.vansairforce.com/community/showthread.php?p=26694#post26694

Rick Galati  RV-6A  "Darla"

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Robin Marks

Joined: 10 Jan 2006
Posts: 24
Location: San Luis Obispo, CA

Posted: Sun Feb 05, 2006 11:49 am Post subject: Rudder Trim

Richard,

	Thanks, that helps a lot. Did you place the trim high on the

rudder, low on the rudder? (seems like I have see them on the lower

section below the horz. stab) Did you place it perpendicular to the

horizon or running along the trailing edge? 



Thanks,

Robin

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_________________
RV-4 Sold
RV-6A 0-360 - C/S Flying

rhdudley(at)att.net
Guest

Posted: Sun Feb 05, 2006 4:43 pm Post subject: Rudder Trim

Robin,



I can't look at it right now but, I believe that I put the wedge about 

midway on the rudder. The trailing edge of the wedge is flush with the 

trailing edge of the rudder. I think that the actual position along the 

trailing edge of the rudder is not important. I placed it where it 

looked ok to me.



Regards,



Richard



Robin Marks wrote:



 	  Quote: 	
		  



Richard,

	Thanks, that helps a lot. Did you place the trim high on the

rudder, low on the rudder? (seems like I have see them on the lower

section below the horz. stab) Did you place it perpendicular to the

horizon or running along the trailing edge? 



Thanks,

Robin

- The Matronics RV-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

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