AndersCN wrote on Aug 30^th, 2013 at 12:24pm:

I've just finished an around the World Tour with the 707, travelling 5-9 hours long steps. The Way i am calculating it is , the aircraft Burns around 15000 lb/hour. Multiply that with the duration of the flight and add 15 percent. Fill up the main tanks first, and add the remaining amount in the center tank. Burn first the fuel in the center tank, then the main tanks. BR, Anders

Good stuff, nice n simple.

Im struggling to find info on the cross feeds. I left them all open but lost the 2 outer engines. What order do we run them in and what to do when a tank runs dry?