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Old Feb 07, 2002, 02:48 AM
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San Diego, CA, USA
Joined May 2001
241 Posts
amp draw twin sp400 4.8v?

Someone help me please, if you have motorcalc, or prior experience.

What is the amp draw from twin sp400 4.8v, running on 12cell, and on zagi props?

thank you in advance
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Old Feb 07, 2002, 10:26 AM
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N. Staffs, UK
Joined Jan 1997
5,654 Posts
I hope you have them connected in series. That's equivalent to one S400 4.8V on 6 cells. Even that will be around 20A, maybe more.

Parallel connection would be ridiculous. The smoke would come out of the motors in about 5 seconds.

Steve
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Old Feb 07, 2002, 12:21 PM
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San Diego, CA, USA
Joined May 2001
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i have the motors connected parallel, and i'm planning to use a 12cell pack. So pretty much do you think, the motors will melt down, or the speed controller will? I'm using the wattage ic550.
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Old Feb 07, 2002, 12:25 PM
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Williamsville, NY, USA
Joined Sep 2000
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I have a twin EDF (Red Flame Blasters) using 4.8v (wired in parallel) s400's on 7 cells, current draw at full throttle is about 23 amps, combined.

With 8 cells these motors draw 13 amps (Robert Wagoner of EFI).
On 8 cells my 4.8 S400 lasted all of 35 flights

Extrapolating from this info one might expect 20 amps each.

I disagree with Steve. The smoke would start in 4 seconds
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