whanderson

First let me say that "C" is a measure of how fast a battery can be safely discharged. It has nothing to do with the total (total being the operative word) amount of power a battery can supply. For example, at 1C a 5000mah battery will supply 5 amps for 1 hour regardless of it's C rating. At 20C this same battery will supply 100 amps for 3 minutes. Get the picture? The amount of current (amps) is controlled by Ohms Law - Current = Voltage/Resistance. As effective motor resistance goes down amps go up. If the battery sees 0Ohms, amps go to as much as the battery can supply. This is a "short" circuit, much smoke, fire, and other bad stuff. Aside from motor resistance, the primary contributor to current draw in any e-power system is propeller size. Bigger props increase amps drawn. So where does C come in? In any particular battery, motor, prop combination certain maneuvers can cause rapid changes in current draw. C is chosen to allow safe operation through these rapid changes. My 2 cents.