See what fun you are missing by not going to a club, geeze Louis !!! 60's burn about an ounce per minute full throttle. A 40 will burn about 2/3 of that. You do the math. Now that number only works if your tank is assembled correctly and you can burn all of the fuel out of it. Start out rich, the plane will lean slightly during the flight. I would say when you have it tuned on the ground, you should fatten it up one click or so to fly it. Unless you have a bunch of sim time, your first flight will probably last somewhere between 30 seconds and 1 minute ! That is the honest truth bro !