ORIGINAL: blw
My pattern model has a 12 oz tank for the 1.25. I fly from half to almost full throttle most of the time. I usually land after 10 minutes with slightly less than half a tank of fuel, depending on weather conditions. I have seen it use less than half a tank with 11-13 minutes of flying. I would not worry about flying 15 minutes and still having plenty of spare fuel onboard. I've considered changing out the tank for a 10 oz one.
Wow! OK - and the fuel you are using is? 5%? 10%?
I have been using the 20/20 with mine first, I didnt like the fuel consumption vs power ratio, so I went back to 15%.
I may just go down to 10% CP If there'll be not a big performance diff from 15% CP, and hope to get your consumption figures.