JS
You probably are using a turbine like the M100XBL (22.5 lbs thrust ) that turbine burns just about 10 oz of fuel at max rpms, I'm planing on a JetCat P60 ( 13.5 lbs thrust ) it burns 8 oz a minute at max rpms, I'm going with the P60 because of my experience with the fuel burn on my Boomerang XL which has a TJT300, burning 14 oz of fuel at max rpms and the way I fly, after an 8 minutes flight and two go arounds I end up with 1/4 of the 1 gallon tank.
With 80 oz ( 76 oz not including the UAT ) I'm expecting to fly for 8 minutes and have enough fuel for at least one go around, ALL this calculated because the way I fly ( relax, mild Aerobatic and at 70% throttle) flying that way I estimated the turbine will be burning around 7 oz a minute giving me nearly 11 minutes of flight from which I only want 8 minutes.
All this calculations are up in the air ( now that's funny
) 'till the airplane goes up for a real flight test
I almost forget, the Boomer is 32 lbs dry and 39 lbs with a gallon of Diesel and about 42 lbs with 30 oz of smoke in it, been push with a 27 lbs thrust engine, it is a pig on TOs but after burning 1/3 of the gallon it really cooks and verticals are supper.