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best way to run a multple battery plane

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Old 08-19-2003, 01:22 AM
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dmajchrzak
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Default best way to run a multple battery plane

So,,, What's the best way to run a multiple battery plane.
I'm thinking of buying my first larger scale airplane and would like to divide the power output among 2 batteries. The easiest way I can think of is just running 2 receivers on the same channel. Any other gizmo's or gadgets I should be aware of?
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Old 08-19-2003, 11:16 AM
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amcross
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Default best way to run a multple battery plane

Dave,
There are lots of possibilities out there. Two receivers is one option. Another is 2 batteries, run through 2 switches, into the same receiver. This gives you redundant switches (the most common failure point) and 2 batteries to provide power. another is to purchase a battery backup system that switches to the 2nd pack if the first pack draws too low.
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Old 08-19-2003, 06:18 PM
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Default best way to run a multple battery plane

Two receivers will also reduce the amps that each must endure. But that only makes a big difference on larger planes with lots of servos.
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Old 08-19-2003, 07:36 PM
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Default best way to run a multple battery plane

IMHO, stay away from battery backup systems. I lost a 120 Ultra Stick on its 1st flight from one of those. It might have been my error, I used (2) 4.8 volt packs when the instruction called for (1) 4.8 and (1) 6.0 volt pack. The aircraft finder alarm built into the backup did work and helped to find the downed airplane in the woods -- alas it was severly damaged.

The simplest approach to multiple batteries is simply 2 switches and 2 channels on your RX (you can share channels with servos by using y-connectors). You have to stay with the same voltage on both packs but do not have to stay with the same capacity. You do have to charge these batteries separately.

If your target is an expensive 30+% scale plane running upwards of 14 servos then consider dual RXs and breakup the servo assignment across the RXs so that if one fails you will still have enough control to get the bird on the ground.
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Old 08-20-2003, 10:19 AM
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Default best way to run a multple battery plane

refer to Giant Scale recommeded set up for parallel batteries=

http://www.fly-giantrc.org/technical/parallelbatt.html

[KISS principle] I have seen at least two large models lost with fault traced back to an expensive add on battery back up system.

regards
Alan T.
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