|Quoting Mandala499 (Reply 2):|
The fuel burn calculations are the inaccurate thing in FS2004 default flight plan. Some addons can do this very well... For me, whenever possible, plan the fuel manually Benchmarks often work better than the automated process... even in real life!
I think you are right. I finished my flight from Guyana (SYCJ) to Narita Japan NRT
non stop with out a fuel stop with the FS2004 B747-400.
Distance as per FS2004 8054.9nm
Fuel Capacity 57164 gallons
Estimated average gallons per mile burn 9.9gallons
Estimated Total Fuel Burn 79834.5 gallons
Actual total fuel burn 52164 gallons !!
Fuel left 4525gallons
Average gallons per mile burned 6.5gl
Reserve range based on fuel left and fuel burn 696nm.
I kept checking my fuel burn on the trip and slowed down on the last 2000nm of the journey from mach .85 to .82 to see if I would increase fuel economy which improved from 9.9 gallons per mile to 6.5. I am not sure if that is what increased the fuel economy. I know in the real world factors such as winds ,.weight temperature ATC would affect the results or planning so the results could have been way different. I am glad I made it though.
Mandala 499. How would you calculate fuel burn on FS2004 ? By the way welcome to my respected user list I have been meaning to do it for some time. Thanks.