DMcQuinn

22mA per minute is the average current consumed and derived from the actual flight time verses the measured residual power of the battery pack. As I suggested you simply continue to discharge the battery to the same known pick point from a previous grading/cycling process and of course your recording the current being consumed. Subtract the recorded residual mA from the known pack capacity to find out the average consumption per minute of flight time.

Your math is skewed somewhat I believe.

A 1,600mAh battery stores 1.6Ah of energy and will discharge 1.6 amps or 1,600mA for 60 minutes or one hour.

22mA equals .022A, 22mA x 30m = 660mAm. My model simply consumed 660mA in 30 minutes. Over the course of an hour this would be 1320mAh or 1.32Ah, .66A / .5 = 1.32Ah. My average per minute current demand of 22mA will discharge the 1,600mAh battery for 72 minutes. BUT where not going there.

1,600mAh x 60% = 960mAh this is the safe usable capacity as previously mentioned with regard for some sort of safety factor. This all ends up suggesting that I can fly my model for approximately 43 minutes with the 1,600mAh battery pack.

Digital servos typically draw about .3mA or at idle under no load and 180-250mA operating. Several tests have verified that a single Hitec HS-5945 digital can draw as much as two amps stalled. This is enormous when you consider that the servo connections used by our OEM manufactures are rated for 2 amps! Think about it!