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Servo Power

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Old 10-09-2004, 12:02 AM
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RC Wingman
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Default Servo Power

I am trying to determine how much battery capicity I need for my plane. How many milliamps does a typical high performance digital servo draw at idle and while in use? Say, for instance, a 150 in/oz coreless servo @ 6V. Anybody know? Is there a rule of thumb to go by?
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Old 10-09-2004, 10:31 AM
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JoeAirPort
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Default RE: Servo Power

A Hitech 5945 draws 3ma at idle and 230ma operating at no load. I'm no servo battery sizing expert but if you estimate that each one will draw 300ma under load, you will need 1500mah to fly for an hour if you have 5 servos. If you have a throttle servo, add another 100-200mah. That will bring you up to about 1700mah. Of course the actual current draw will be less. I typically get about six 10 minute flights out of my 6 volt, 1700mah, rx pack. Estimating is just estimating, you may throw your sticks a lot and the time may be less and if you fly ovals, it may be more.

http://www.servocity.com/html/hs-594...al_torque.html

I have (5) 5645's and a mini throttle servo. 1700 mah works great.



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Old 10-09-2004, 01:17 PM
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Default RE: Servo Power

Thanks Joe...just the info I was looking for, especially the working load number. Gives me a good starting place. Thanks again.
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