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6 Servos on a 4.8 volt, 700mAh Sport Battery???

Old 03-10-2004, 11:10 AM
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eliminator
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Default 6 Servos on a 4.8 volt, 700mAh Sport Battery???

Can a 4.8 volt, 700mAh Sport Pack Receiver Battery handle 5 standard servos and a retract servo? If not, what can?

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Old 03-10-2004, 02:53 PM
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DGrant
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Default RE: 6 Servos on a 4.8 volt, 700mAh Sport Battery???

I wouldn't do it. I would go with at least a 1200-1400. I'm not quite sure of the draw, and someone will fill us in more on that I hope, but I do know a 600-700Mah is pretty standard for 4 servos, with little draw for trainer style flying, and mild aerobatics. Add to that 2 more servos, and some decent loads with the retract operations, and you should be up at least 400-500Mah just for that. So...given 700Mah for your standard servo operation, now add...well...400-500Mah for the reserve/extra servo power,,,,,yeppers..... About 1200-1400Mah is about right. I run this in all multi-servo combo's(1400Mah packs), and it does have plenty of power.

I have that in a Midwest 27% Extra running 6 servos, as well, as a H9 Edge540 running 6 servos, and a have used it in multi-servo/retract applications with no prob. You can probably expect 4-5 flights safely with it. Always, always, always keep an eye on your packs with a good meter.

Voltage is another story, and for most apps 4.8 is fine, as you didn't say what type of plane your putting it in. The Mah that we're talking about though is capacity, and that's what you need for more then a standard 4ch set-up.
Old 03-10-2004, 11:38 PM
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JPMacG
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Default RE: 6 Servos on a 4.8 volt, 700mAh Sport Battery???

I get 5-6 10 minute flights from a 700 mAh pack on a 5 servo 40-sized profile plane doing (attempting) lots of 3D stuff. This takes the pack down below 50% capacity.

If you want to be more conservative then a 1100 mAh pack would be a good choice.
Old 03-11-2004, 01:51 AM
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Lynx
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Default RE: 6 Servos on a 4.8 volt, 700mAh Sport Battery???

You didn't mention if it was a Nimh or NiCad pack either. Nicad packs can source at least double the amount of current a NiMH pack of the same capacity can. Granted they're heavier and the extra capacity will give you more flights.
Old 03-11-2004, 06:55 PM
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JPMacG
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Default RE: 6 Servos on a 4.8 volt, 700mAh Sport Battery???

I may have answered the wrong question. Eliminator, is your concern that the 700 mAh pack won't last long (give you enough flights) or that the pack won't source enough current for your servos during agressive maneuvers?
Old 03-12-2004, 10:26 AM
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Default RE: 6 Servos on a 4.8 volt, 700mAh Sport Battery???

So long as there is no binding in the retracts, then you should be able to get 4 flights from that pack. If you have retract binding, all bets are off!
Old 03-12-2004, 11:23 PM
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aeajr
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Default RE: 6 Servos on a 4.8 volt, 700mAh Sport Battery???

What is the question. I am putting togehter a 6 servo sailplane and would have no concern with 6 servos on a 700 mah nicad pack.

Remember that you are not drawing much from a quiet servo. So you will be working ailerons, rudder and elevator a lot, but flaps are not likely to be working much unless you have them coordinated with the ailerons. The retracts is down then up then to sleep.

You should easily have enough current.

What kind of flying are you doing? Sport cruising around the field, or full pattern flying?

More info please.

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