I run an atomic force motor in my corona (timed). I run it with an 8 cell HRSC 2600 battery pack and get 8.5 min of flight. I like the 8 cell over the 7 cell as it is slightly heavier and makes it more stable . It also provides a little more power. Good choice on the Corona - you won't be disappointed! Just stay away from the lite machines ESC and motor.