I honestly dont remember, it has been well over a year since I retired her. I am guessing anywhere from 15-20 minutes depending on throttle and about 30-45 MPH and this is with only about 60% throttle as I had to limit it because of over-amping the ESC.

The good thing about brushless is the efficiency, yes they can suck a battery dry in no time but if you throttle back and fly around at the speeds a stock Super Cub flys at you would be up for almost a half hour no problem.