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Home✈️Aircraft🚁Helicoptere-Century Radikal E640 - Swift 16 NX › i need your help on battery
09-06-2006 06:32 PM  14 years ago
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heliman3

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Pensacol FL usa

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i need your help on battery
8c cont and 15 burst charge 4s3p 6600mah battery
can i get by on a (8c )battery. i sure a few have. will it work for me
on a Swift ep helicopter. your help would be priseated.
thanks a lot
asap would help befor i buy it,
heliman3
thanks to all i got my asw
Aubrey
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09-06-2006 07:23 PM  14 years ago
wakeboarder2342

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USA

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an 8c battery of that size would have no problems running a swift. Again this depends on your setup, motor esc ect but for the most part a swift will pull between 30 and 45 amps. If you have a 6600 mah lipo at 8c you can pull 52 amps continous out of the pack.

Now if that was only a 3300mah packyou would no be ok as it would then only be good for 26 amps.
favorite quote, no honey thats the same helicoptor i have always had
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09-12-2006 01:17 AM  14 years ago
heliman3

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Pensacol FL usa

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10c cont and 15 burst charge 4s3p 6600mah battery what would my amp be
10c cont and 15 burst charge 4s3p 6600mah battery
can i get by on a (10c )battery. i sure a few have. will it work for me
on a Swift ep helicopter. your help would be priseated.
thanks a lot
asap
heliman3
Aubrey
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09-12-2006 01:46 AM  14 years ago
Stack

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Bethlehem, PA

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This is where I need some remedial training.

Can you explain the math and why it works wake? I'd appreciate it.
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09-12-2006 05:09 AM  14 years ago
wakeboarder2342

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USA

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Ok here is battery 101!


Your heli needs a certain amount of watts to fly, watts=amps*volts so for example my swift is 7s or about 25 volts and pulls 35 amps so it is using around 875 watts to fly.

now batterys are rated in what they call a C rating or the amount of amps you can pull out of the battery at one time without damaging them. for example a 2000mah battery that is rated for 10c is good for 20 amps continuous. That same battery in a 3p setup would be 6000 mah and therefore good for 60 amps continuous.

Now if your heli needs 875 watts you can get those watts in different ways, for example my setup on approximately 25 volts needs 35 amps, but the same setup on 5s is only 18.5 volts so to get 875 watts you would need 47 amps.


now generally speaking brushless motors are more effecient at higher voltage and lower amps then lower voltage and higher amps but theoretically you could accomplish the same thing with a large 3s lipo as a 10s small lipo, depending on the kv of the motor and gearing, (although you would have a hard time finding a motor with much torque at only 3s)


anyway that is the down and dirty of E power. just remember amps*volts=watts and the c rating will determine the amount of amps that can be safely pulled from the battery.

hope that helps, i tried to put it in as simple terms as i could!
favorite quote, no honey thats the same helicoptor i have always had
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09-12-2006 05:19 AM  14 years ago
cudaboy_71

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sacramento, ca, u.s.

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very concise answer there WB. excellent.

i thought about chiming in but would have ended up with a 9 page white paper with foot notes and references...too much work for a monday evening
if it ain't broke, break it.
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09-12-2006 05:25 AM  14 years ago
Stack

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Bethlehem, PA

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Thanks Wake! Awesome!
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09-12-2006 06:22 AM  14 years ago
heliman3

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Pensacol FL usa

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i now do see what your saying
thanks
lot
heliman3
Aubrey
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