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Receiver Battery Capacity - 2/18/2012 6:40 AM   
Stoneke


 

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From: Klamath Falls, OR, USA
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I am planning to buy a couple of receiver batteries for planes presently under construction/rennovation. I am not skilled to fly either of these planes, but like the building aspect and now need the system powered in the build stage. I am not the best informed on this subject, so solicite your knowing input. I like the Hobbico Life batteries - that being said, what mAh capicity would you recommend for the following birds. 6.6 volts is a given.

ESM 74" Corsair with digital servos all around.Eight servos. Weight conservation is a factor.
Byron giant (101") AT6 with six analog and one digital flap servo. Seven servos total.

Thanks for you input.  Keith



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RE: Receiver Battery Capacity - 2/18/2012 12:44 PM   
Edwin


 

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From: Leander, TX, USA
Status: offline 		Hmm! I run spektrum so the receiver gets its own battery, usually 1200 to 1400 ma. The servos get a separate battery to prevent any chance of a receiver reset. Servo City sells a cheap little power bus spliter to do this, in the servo wires section.
When I was running all digital in my Yak I used 3600ma for 4 digital servos and one analog for throttle. If you're running eight digital and receiver, I would GUESS at around 3600 to 4000ma minimum. I only fly nicd or nimh and get them from Hang Time hobbies. Lots of guys fly lipo, maybe they will chime in. I also use a watt meter to see what my current draw really is and size accordingly.
Edwin

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RE: Receiver Battery Capacity - 2/19/2012 2:07 AM   
Mk23socom



Posts: 649
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From: Libby, MT, USA
Status: offline 		For the 3D birds you would need a larger capacity battery for the high draw of servos at full throw and for longer periods of time at large throw. For an ESM Warbird, I would imagine that running a single 2100 LiFe or twin 2100 LiFes would be the ticket.. Remember, warbirds almost NEVER use full throw on their surfaces save for flaps. Typically, the only time I have used full throw on anything, it was the rudder, while turning on the runway to orient for takeoff..

Also, if you set your flap servo up the right way, you can get it to where the flaps are down, and the servo arm is pointed straight at the flap load which will keep the servo from drawing a ton of juice to stay at full throw. :-)


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