Hi RCBill,

Please let us know how long you can fy with a 16 oz tank. My setup is close to yours and the tank is a 20 oz one. I usually fill the tank full and then back-crank about 12 turns to withdraw about 1-2 oz from the tank. It is not precise and still has about 1/3 of fuel left. Each flight lasts about 9 minutes.

Thanks --qc