in this video on the rleft hand corner you will see the link quality of the crossfire, middle left is the throttle percentage, notice i am between 26 and 35% throttle most the time, but still going around 40 mph, bottom left u will notice the amp draw, this set up is pretty darn efficient for mid range flying ( about 1/2 mile to 1 1/2 miles) but it still has gobs and gobs of power to get you out of trouple if needed, 5s gives each motors close to 2000 grams of thrust on a 6.45 bi prop.