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Old 02-23-2007, 04:41 PM   #1
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need a fix

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I have a problem with aileron servo torque I built a top flight P39 Airacrobra all built up surfaces with split flaps Im having torque problems with my ailerons everything moves easy no problem there but when ailerons are up or down if you push on the aileron in the oposite direction you can actualy push it about half way back to center I have checked every thing no loose conections or any thing sorvos are Hytech HS 325-HB standard it looks to me as if the servo is not strong enough controle rods are 2-3/4" long straight one servo for each aileron how can increese torque without haveing to buy more expensive servos
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Old 02-23-2007, 05:06 PM   #2
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I bought 2 standard size servos (gws)with 100oz torque each for $34.00 pr. delivered to the door .wish I had bought the 6 pack as it still shipped for the same money Now if that is to pricy can't help yah. Let me know if you want the link
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Old 02-23-2007, 05:56 PM   #3
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There must be some slop somwhere?

Are you saying with the radio on when you deflect your ailerons you can take a finger and with minimal effort get the aileron to mve over half of it's travel? Do you know if the servo arm is moving when you do this?

Do you have one servo that moves both ailerons or one servo per aileron? What is the control rod material between the servo and the surface?

What are the Torque Specs for your servo? Are you running 4.8v or 6.0v?
Jim Daly
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Old 02-23-2007, 06:02 PM   #4
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Hi hyflyer9,

Is your Rx battery charged up?

Torque goes way down on any servo is there is no juice to push it...

Take care,
Have fun,
Maac 6437
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Old 02-23-2007, 06:12 PM   #5
Wayne MIller
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Low servo torque

Hi Hiflyer9,

First make sure your batteries are good, they may test OK when at idle, but drop way down in voltage when a load is applied. This may be fixed by cycling the batteries a few times.

Second, you may want to try putting the servo linkage in the hole as close as possible to the center of the servo arm, with the control horn linkage in the farthest hole out in the control horn (away from the control surface). Use your radio to adjust the travel as necessary. This will give your servo maximum leverage on the control surface.

Third, you may want to try a 6v receiver battery pack, this will increase the servo torque.

Hope this helps.


Wayne Miller
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