a 7.2 V, 2400 mah battery to my speed 550 motor and draw near maximum power from said battery pack, how long a flight time might I expect?
To fiqure this out , we need to know how much current is drawn for this particular motor using 7.2 volts.
Current (unloaded): 1.9-2.6A
This spec is from a 600 motor powered by a 7.2 dc battery.
So if you divide 2.6ma into 2400mAh you would get 0.923076923 hours the batery would last. that is if you only power the motor with the battery which we know you will not. The receiver , esc, and servos current draws are added into the equation to give you a better idea on how long the battery will last.