Originally Posted by
Goat Whisperer
That's 2760kg per hour, a lot more than a 737-800 burns.
2200-2400 in the cruise. 5.5kg/air nautical mile.
Looking a SYD-MEL flight today, close to full, burn is 3120 kg, plus 250 APU and taxi. MEL-SYD is a little less with tailwind. 2810 plus 220 taxi/APU.
My numbers aren’t per minute in cruise burn, they are the average total stage time burn for the sectors we are discussing.
Longer flights are slightly more efficient since the climb burn is offset somewhat. I just did a 5:20 flight and the burn was 44.6 kg/minute. Plus approach of 300 and taxi of 189
The 737 burns 1800 from the gate to top of climb, +/-. 1800 kg for the last hour. And about 2,400/hr in cruise. Conveniently, the burn at 68 tonnes is related to the indicated speed thus: 250 kts = 2,500 kg/hr. Same relationship at all speeds below the Mach drag effects. Take the indicated, add a zero, and that’s ~ how many kg/hr you burn. What you do with that indicated airspeed v. True airspeed is up to you.