With thermaling and lift from small hills and trees I have flown for 1hr+. But 1/4 to 1/2 throttle on a calm/no natural lift day with a couple take offs and landings I usually get 50 minutes to an hour. Compared to my GP Rimfire motor it is far more efficient. It's about as efficient as AXI motors of the equivilent size. I found a really small high-def Cannon camcorder for my aerial video. I think the long flight times has to do with the huge amount of lift on the slowstick dihedral wing. But yeah. Its really fun.