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Old Mar 23, 2012, 10:29 AM
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United States, GA, Alpharetta
Joined Feb 2011
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Servo problem, please help

Hey guys, so i just replaced a servo on my left aileron. It is the exact same servo as was on it before and the exact servo that is on the right aileron. It maybe a newer version but that is about it. Is there any way to make these line up without moving the rod? The old one lined up perfectly. The push rods are even just not the servo. Thanks!
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Old Mar 23, 2012, 10:35 AM
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AshtonFlyer's Avatar
United Kingdom, England, Bristol
Joined Dec 2011
628 Posts
I think that, if you removed the old servo but left the old servo arm attached to the control rod, then you've put the new servo in back to front.

Just undo the servo arm from the servo (small screw on top), undo the control rod holder so the rod can slide freely, then replace the servo arm at 90 degrees on the servo and tighten up the control rod.

If you want, you can just flip the servo around by 180 degrees though

Either way, make sure the servo arm is centred as close to 90 degrees as possible when powered and that the trims are dead zero
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Old Mar 23, 2012, 10:51 AM
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United States, GA, Alpharetta
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got it much closer! thanks, Now I cant figure out how the pushrod screw releases. I bought this plane used so did not build it and still learning myself.
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Old Mar 23, 2012, 11:00 AM
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United Kingdom, England, Bristol
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Probably an Allen (hex) key? 1.5mm seems common
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Old Mar 23, 2012, 11:09 AM
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got it! thanks so much
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Old Mar 23, 2012, 11:51 AM
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Moab, Utah, USA
Joined Apr 2003
6,141 Posts
You don't want to loosen the pushrod screw. If you rotated the servo as suggested, put it back the way was in the photo. What you want to do is remove the arm from the servo. then with the radio on and the aileron stick and trim centered, put the arm back on the servo in the desired position which should be with the aileron in the neutral position.

Larry
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Old Mar 23, 2012, 03:51 PM
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United States, GA, Alpharetta
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That's what i thought he meant to do and what i actually did
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Old Mar 24, 2012, 12:45 AM
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Taiwan, 北市
Joined Dec 2010
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Better to use the servo with the same brand and same model number as the other one, and be sure to test to see if they all work at the same speed and travel.
Chen
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