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servo selection

Old 12-12-2005, 03:55 AM
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CARTERrc
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Default servo selection

DOes anyone have any advise on which servos to choose for a pattern plane that is big enough to easily hold an OS 120AX. Particularly for the elevator rudder and ailerons.
Old 12-12-2005, 07:28 AM
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gadix
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Default RE: servo selection

gooday mate
which airplane?
what size?
it is more depend on the surface that the servo needs to move rather than the engine size...

any digital from 9kg will do fine.
i prefer the new hitech ones allthough i'm a JR preson my self...

cheers
gadi
Old 12-12-2005, 11:41 PM
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CARTERrc
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Default RE: servo selection

The adrenaline from esm (Pattern/3d/freestyle)
This plane is 120 size.
Old 12-13-2005, 04:05 AM
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stek79
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Default RE: servo selection

Hello,
it depends on what type of schedules are you flying.

In general, the most powerful servo goes on the rudder, since this is the surface that demands more torque. Nothing less that 5-6Kg.cm, a digital might be a good choice for its positioning precision and holding strenght. On the elevator, given the low thows we use in pattern and the limited surface, even a 3 Kg.cm servo will be enough, but you might want to put 5Kg.cm on it, just to be sure...
On ailerons, you might choose something around 6Kg.cm or more if they fit, since ailerons have fairly large surface and it is desirable that they never exhibit surface blowback, even at high speeds.

Bye!

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