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servo selection

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Old 09-16-2003, 04:47 PM
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andy120
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Default servo selection

Guys, how do you select a servo for any given application ?

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Old 09-16-2003, 06:31 PM
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Default RE: servo selection

Ok, how does one work out how much torque is needed ?

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Old 09-16-2003, 07:08 PM
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Default RE: servo selection

The size of the control surface, and the amount of deflection it needs is the primary way of picking. There's no rule that I know of to pick exactly the one you need but common sense should rule. If you look around on the net you should be able to find a way to calculate how much resistance a given wind will create on a given surface area at a given angle. You need to use a servo that can supply enough torque to hold the control surface at whatever your maximum deflection is under it's worse loading condition. Either learn the math or try different servo's on the same application and see how they work for you.
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Old 09-17-2003, 01:20 AM
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UK Flier
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Default RE: servo selection

I asked a similar question and got this response from MrMike

"I like to use this tool <http://members.cox.net/evdesign/page...e_design.html>. You can plug in a variety of parameters and see the various effects graphically. The electronic download cost is minimal. "

The program is excellent, not just for servo selection but also for setting up pushrods to give the least load on your servos across the range of movement. There are setups for long and short push rods as well as for rotary movement.

The good news you don't have to be a Maths wizard.

Enjoy
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