Originally Posted by Old Boeing Driver
Lots of range discussions regarding 6 to 7 hours.
I assume that would be for FL350.
What would be the range possibilities at 3,000 feet or lower?
Under standard conditions:
LRC at 6000' at 220T AUW, the fuel flow is about 7.8T per hour. This is with a TAS of about 340 KTAS.
For endurance, best holding speed of 225 KIAS at 5000' with 220T AUW, the fuel flow is about 6.5T per hour.
Depending on the ZFW, the estimated mission fuel is probably 45-50T for this sector. At position Igari, the fuel used would have been about 7-8T? Just rough estimation.
T = tonnes = 1000kg = 2200lb