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Rudder Trim Tab

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italianjon

Joined: 05 Aug 2015
Posts: 68

Posted: Sun Oct 18, 2015 10:46 am Post subject: Rudder Trim Tab

Hi All,



Is there a specific part for a Rudder Trim Tab. Just the mechanical ground adjustable by bending ones? I can't find anything in the manuals, and I need to replace mine. Or is it just a piece of square steel sheet, painted.



I am also guessing that it should be "epoxy-ed" in place. I have '5-minute Epoxy' or should I use the longer cure stuff?



Regards



Jon

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dpark748(at)icloud.com
Guest

Posted: Sun Oct 18, 2015 12:36 pm Post subject: Rudder Trim Tab

I used a piece of alloy siliconed to rudder. With view to easy removal but  stuck too well. 

Dave G-LDVO



Sent from my iPhone

 	  Quote: 	
		   On 18 Oct 2015, at 19:46, italianjon <jon.catilli(at)gmail.com> wrote:

 

 

 

 Hi All,

 

 Is there a specific part for a Rudder Trim Tab. Just the mechanical ground adjustable by bending ones? I can't find anything in the manuals, and I need to replace mine. Or is it just a piece of square steel sheet, painted.

 

 I am also guessing that it should be "epoxy-ed" in place. I have '5-minute Epoxy' or should I use the longer cure stuff?

 

 Regards

 

 Jon

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=448051#448051

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budyerly(at)msn.com
Guest

Posted: Sun Oct 18, 2015 2:10 pm Post subject: Rudder Trim Tab

Jon,



A rudder tab can be made out of any thin sheet metal.  Normally I don't use 

tabs on a rudder but .016 aluminum or a left over piece of stainless can be 

used.



It is important to know what you want to stick it on with for sure. 

Depending on your paint, you will be best served gluing a tab on with epoxy, 

although I have seen it done with contact cement.  Seems like whatever 

sticks fast ruins the paint.



As for the size, the shorter in length and width, the farther the tab must 

be bent and drag will occur.  A minimum size to consider is 6-8 inches by 

1.0 inch which should only normally be bent about 1/4 inch.



To find out how much is needed take a 1/4 x 10 inch wood pencil and some 

tape and attach it to the rudder like a ramp.  (See attached drawing.)



I normally prefer to use the rudder cable adjuster to adjust the rudder 

trim.  That is, if the plane needs a touch of left rudder at cruise, I 

shorten the left cable a bit to bias the rudder over and fly feet on the 

floor.  Of course fixed trim tabs are good at only one power setting and 

speed for the most part.  If it is more than that, look at my trimming 

techniques page on my website.  If the plane isn't square, fix it.  I know 

its painful, but so is holding the flight controls on a cross country.



My wife won't let me put in an autopilot because she never saw me need to do 

anything but nudge the stick once in a while.  "It flies itself, so is an 

autopilot necessary."  I need to fly her on a rough day so I can get my new 

transponder and an autopilot.



Best Regards,

Bud Yerly

customflightcreations.com



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italianjon

Joined: 05 Aug 2015
Posts: 68

Posted: Sat Nov 28, 2015 2:33 am Post subject: Re: Rudder Trim Tab

Hi All,



just wanted to close the loop on this and say thanks. All sorted out now

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