[rebel-builders] RE: Before you install that rudder trim tab

[drewjan]

Burn the fuel in the heavy wing first :)
------Original Message------
From: ray.mason@dcsol.com
Sender: mike.davis@dcsol.com
To: rebel-builders@dcsol.com
ReplyTo: rebel-builders@dcsol.com
Subject: [rebel-builders] RE: Before you install that rudder trim tab - STOP
Sent: Apr 4, 2011 10:45 PM

Anyadvice on adjusting aileron trim?

On 3/15/2011 6:08 PM, oifa@irishfield.on.ca wrote to rebel-builders:

-> Reading another forum on broken rudder pedal return springs on Super
-> Cubs......
->
-> ...... got me to thinking about the numerous Rebels and Elites that I've
had
-> thru the hangar/shop over the years, that have arrived here sporting a
trim
-> tab on the rudder.
->
-> Before you make this ugly, forehead cutting mistake, that you'll regret
next
-> time you bend down and pick up the tail by the tail spring..
->
-> Lift the tail up and set it on a sawhorse, milk stool or what ever you have
-> handy. Now grab the rudder in your hand and push it fully left... fully
-> right.. back to center.. did the cables stay tight or did they go slack??
-> Every airplane I've had come in here sporting a trim tab has had one
rudder
-> cable that goes slack (or a tail wheel friction issue). Improper spring
-> geometry or excess friction somewhere in the system that doesn't allow
the
-> rudder pedal (and it's spring) to maintain cable tension. This is the
-> generally the cause for the need of a rudder trim tab.. not an issue of the
-> control surface itself, but one rudder pedal return spring pulling the cable
-> tight and the other one not doing so.
->
-> So before you rivet that mess on the tail... check out the cause. Also
-> remember when you have the cables running smoothly you can also trim
for any
-> minor issues by tightening the spring on one side. Better there than the
-> drag (or cut forehead) of a trim tab.
->
-> When you go to floats/amphibs..... if you find you need a bit of rudder trim
-> just adjust a water rudder slightly in the opposite direction and it will
-> move your air rudder for you, for feet off "ball in the center" flight!
->
-> Wayne
->
->




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