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One or Two Batteries

Old 12-05-2008, 07:05 PM
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clt12981
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Default One or Two Batteries


Need advice. Building a P-38 twin engine plane. 52" wing span, dual 480 motors, dual 45 amp esc.

My question is, can I run one single battery or do I need to run two batteries one for each motor?



Thanks Chuck
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Old 12-05-2008, 07:11 PM
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firemanbill
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Originally Posted by clt12981 View Post

Need advice. Building a P-38 twin engine plane. 52" wing span, dual 480 motors, dual 45 amp esc.

My question is, can I run one single battery or do I need to run two batteries one for each motor?



Thanks Chuck

You can run one or two, either way will be fine. I run one 3s lipo in my 4 motor C-130 and it has been working well for almost three years now.

I run 2 batts in my 2 motor Eflite Super Airliner.

What ever will work out best as far as balance and weight goes should be the way to go.

Good luck!
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Old 12-05-2008, 07:12 PM
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Bub Steve
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Originally Posted by clt12981 View Post

Need advice. Building a P-38 twin engine plane. 52" wing span, dual 480 motors, dual 45 amp esc.

My question is, can I run one single battery or do I need to run two batteries one for each motor?



Thanks Chuck
I use two for balance but if your put'in it in the fuse one's fine, your bub, steve
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Old 12-05-2008, 08:02 PM
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Old Fart
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I run a single battery on my GWS P-38, F-14 and two batteries on my Sonic Liner. The Sonic's system parallels the batteries.
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Old 12-05-2008, 09:18 PM
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Mayday!Mayday!
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This is usally a matter of balance as stated above, however you may want to consider 1 battery to run the setup. If using 2, you could have an issue with one hitting LVC before the other, or 1 battery holding voltage better than the other causing 1 motor to use slighty more mah faster.
I would if using 2 batteries, make sure the motors are the same, batteries are the same and of same age and cycles just to keep things as close as possible.
Also, when setting up a dual motor setup, remember the rotation of the props are different. The motor on the right wing should rotate clockwise if looking from the front of the plane, and the left wing counter-clock.

Either way, one or 2 batteries will work. It's your call.
This artical may help.
http://www.castlecreations.com/media...03-Mar2006.pdf

Last edited by Mayday!Mayday!; 12-05-2008 at 09:43 PM. Reason: Added CC artical
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Old 12-05-2008, 11:21 PM
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One of the reasons I like to parallel the batteries - it pretty much eliminates the possibility of one motor cutting out prematurely (unless you go really crazy and drop your LVC setting)

Counter-rotating the props is nice - I did that on all three planes. Really helped with the adverse torque rotation on takeoff. Prop selection isn't great (really wish APC would offer the 6x5.5 in RR). Oh, and if you do run one RR prop - it will ALWAYS be the one to break in a bad landing
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Old 12-05-2008, 11:27 PM
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I ran two 3S 2150 15C packs in parallel on my 52" P-38. I disconeccted the red wire on one of the ESCs so I only had one BEC working. The only reason I used two packs is because that was the only size I had and didn't want to buy any 4200 mAh packs. Either way is fine.
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Old 12-06-2008, 12:22 AM
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clt12981
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Thanks all !!!!!!!!

Chuck
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