RCU Forums - View Single Post - 11v vs 14v What's this diff. 4s packs users speak up
Old 06-27-2007 | 12:41 AM
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noguy
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Default RE: 11v vs 14v What's this diff. 4s packs users speak up

Daniel, You are the man. Thank you!

You are right about me calling the batterys' stored "power" watts. That is wrong. watts are "consumption" at a given moment. The value from the calculations I gave, I think should be called Wh (watt-hours). Like the kWh (killoWatt-hours) your power company uses to charge us for total "power" used.

Ok Im looking at TP batt specs here. Which are as follows for the 2200mAh packs.
2200 @ 11.1V weighs 170g & the 2200 @ 14.8v weighs 218g.
If 2.2ah*11.1v= 24.4w & 2.2*14.8= 32.6w
Then 170g/24.4w= 7grams per watt for the 3s
& 218g/32.6w= 6.7grams per watt for the 4s
I think it should read like this 2.2ah=(2200mAh) 2.2Ah * 11.1V = 24.4Wh & 2.2Ah * 14.8V = 32.6Wh

yes these are all theoretical. Sorta a 'static' value versus the 'dynamic' value which would be the actual Wh's put into flight and not lost in friction, heat, & ect.

I have one 3s pack now & I think Im gonna try a 4s. With your familiarity with bl motors, do you have any motors that you would recomend for a 450 heli? One of the better quality as you described. Also would it be better for me to choose a lower kv motor of said high quality?

Thank You again, Noah