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Rudder trim tab

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WurlyBird

Joined: 16 May 2008
Posts: 207
Location: North Pole, Alaska

Posted: Sat Mar 21, 2009 3:24 pm Post subject: Rudder trim tab

I am wondering if anybody has made a rudder trim tab and would like to share how they did it?  I know it will only be really accurate at one airspeed and I am okay with that since I spend a lot more time at "cruise" then throttled back for a landing.  



I assume it is as simple as riveting a sheet of steel or aluminum to the rudder and then just experimenting with it's deflection.  Any input?



Did I mention I soloed the Kitfox today?  I mean on this thread of course.

_________________
James
Kitfox 3 / 582 / 70" IVO 2 blade GA
50 hrs on the 582 swapping for HKS 700E and Avid Cowl.

lcfitt(at)sbcglobal.net
Guest

Posted: Sat Mar 21, 2009 4:01 pm Post subject: Rudder trim tab

James,



I did exactly as you suggest and it worked well.



Lowell



---

WurlyBird

Joined: 16 May 2008
Posts: 207
Location: North Pole, Alaska

Posted: Sat Mar 21, 2009 5:23 pm Post subject: Re: Rudder trim tab

Lowell, what size tab did you use and what were it's dimensions?  What is it made of?  Have any pictures you could send me?



Thanks a lot



James

_________________
James
Kitfox 3 / 582 / 70" IVO 2 blade GA
50 hrs on the 582 swapping for HKS 700E and Avid Cowl.

Dick Maddux

Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl

Posted: Sun Mar 22, 2009 4:39 am Post subject: Rudder trim tab

James,

  This is the way I did it. Just a small aluminum plate I attached with 4  #6 or #4 screws (can't remember which) so that I could remove it or increase the tab size if I needed to. I had to adjust the bend a couple of times but now it is spot on (as the British would say). I have a picture from my files albeit not very good.

                                                  Dick Maddux

                                                  Fox 4 

                                                  Pensacola,Fl   

 Feeling the pinch at the grocery store?  Make dinner for $10 or less.

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lcfitt(at)sbcglobal.net
Guest

Posted: Sun Mar 22, 2009 6:54 am Post subject: Rudder trim tab

Mike,



I checked my picture files and found nothing.  Dick Maddox's picture is 

about like mine and in the same location.  It is aluminum and likely .025.



Lowell



---

pwmac(at)sisna.com
Guest

Posted: Sun Mar 22, 2009 7:52 am Post subject: Rudder trim tab

I saw a simple fix. It was a small triangular piece glued to the 

rudder. Easy to change and fine tune. No drilling etc. It appeared to 

be white plastic.

I wonder if it lasted?

Paul

Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Sun Mar 22, 2009 8:09 am Post subject: Rudder trim tab

Here's how I did mine, James. Take the aluminum plate and "forge" it  

over a scrap piece of tubing or a 3/8" extension, and you'll be able  

to get the pop rivets into 2 different rows around the trailing edge  

tubing of the rudder. This will allow for a MUCH stronger attachment  

than if you just ran a straight row of rivets. If you don't...and you  

do much altering of the tab.....you'll run the risk of bending the  

rivets and the tab will become loose. I attached mine with aluminum  

rivets so I could drill the out if I decided on another method. My  

aluminum rivets haven't loosened in the 500 or so hours since I  

installed it.



Lynn Matteson

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 618.4 hrs

Sensenich 62x46

Electroair direct-fire ignition system

Status: flying





On Mar 21, 2009, at 7:24 PM, WurlyBird wrote:



 	  Quote: 	
		   

 <james.t.trizzino(at)us.army.mil>



 I am wondering if anybody has made a rudder trim tab and would like  

 to share how they did it?  I know it will only be really accurate  

 at one airspeed and I am okay with that since I spend a lot more  

 time at "cruise" then throttled back for a landing.



 I assume it is as simple as riveting a sheet of steel or aluminum  

 to the rudder and then just experimenting with it's deflection.   

 Any input?



 Did I mention I soloed the Kitfox today?  I mean on this thread of  

 course.  



 --------

 James

 Kitfox 3 / 582 / GSC prop

 4 hrs of instruction and  climbing (I solo tomorrow)





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 35554#235554

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_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

rliebmann(at)comcast.net
Guest

Posted: Sun Mar 22, 2009 8:19 am Post subject: Rudder trim tab

I made my rudder trim a cockpit adjustable one and am happy with it.  If 

anyone wants more info on how it is made, just e-mail me on or off list.



Ron            rliebmann(at)comcast.net



From: "paul wilson" <pwmac(at)sisna.com>

To: <kitfox-list(at)matronics.com>

Sent: Sunday, March 22, 2009 10:51 AM

Subject: Re: Re: Rudder trim tab

 	  Quote: 	
		   



 I saw a simple fix. It was a small triangular piece glued to the rudder. 

 Easy to change and fine tune. No drilling etc. It appeared to be white 

 plastic.

 I wonder if it lasted?

 Paul

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Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Sun Mar 22, 2009 9:06 am Post subject: Rudder trim tab

Hi Ron-

The question is, how are you gonna fly your giant RC model now that  

you borrowed those control horns from it?  : )



Lynn Matteson

Kitfox IV Speedster, taildragger

Jabiru 2200, #2062, 618.4 hrs

Sensenich 62x46

Electroair direct-fire ignition system

Status: flying

do not archive



On Mar 22, 2009, at 12:13 PM, Ron Liebmann wrote:



 	  Quote: 	
		   I made my rudder trim a cockpit adjustable one and am happy with  

 it.  If anyone wants more info on how it is made, just e-mail me on  

 or off list.



 Ron            rliebmann(at)comcast.net

_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

patreilly43(at)hotmail.co
Guest

Posted: Mon Mar 23, 2009 10:10 am Post subject: Rudder trim tab

Dick C The light blue lines striping the edge of the dark blue on your plane C is that tape or paint?

  

 Pat Reilly

 Mod 3 582 Rebuild

 Rockford CIL

 

  From: Catz631(at)aol.com

Date: Sun C 22 Mar 2009 08:36:41 -0400

Subject: Re: Rudder trim tab

To: kitfox-list(at)matronics.com



 James C

  This is the way I did it. Just a small aluminum plate I attached with 4  #6 or #4 screws (can't remember which) so that I could remove it or increase the tab size if I needed to. I had to adjust the bend a couple of times but now it is spot on (as the British would say). I have a picture from my files albeit not very good.

                                                  Dick Maddux

                                                  Fox 4 

                                                  Pensacola CFl   



  Feeling the pinch at the grocery store? Make dinner for $10 or less. 

  [quote][b]

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