I don't run mine full for the whole flight either but I get 15 min. I run a 13x6, 30% Heli fuel, on a Pizazz. I Think I got 10 Min. at full Throttle. I set my timer for 10 because we have a small field which requires a couple of passes to hit a good landing. There are days with no wind to hold it back and it just does not want to come down, So I allow for multiple approaches.