planning figures are 2400 lb / hr until you are above 40,000 lb when you can expect to burn 2600 lb / hr.
Flying with an external load (USL) will usually increase your fuel flow and requires an additional fuel flow increment based on drag.
This equates to 40 - 45 lb / min if you are FJ minded.
. .The metric version the RAF use (they have better engines and slightly better fuel flow / power available) is 20 kg / min, equating to a planning figuere of 10 kg / nautical mile czoz they go everywhere at 120 Knots or better!
Why do you need this?