20.3 is here! The reworked 757 is beautiful and a dream to fly. Here are some fuel profiles to help you get the best fuel economy.
How to Read This Guide
An orange cell signifies a cruise altitude a little too high for that aircraft at that weight that carries smaller fuel penalties.
A green cell signifies a cruise altitude appropriate for that aircraft at that weight going East, maximizing fuel economy.
A blue cell signifies a cruise altitude appropriate for that aircraft at that weight going West, maximizing fuel economy.
A grey cell signifies a cruise altitude that is too low for that aircraft at that weight that may or may not carry a small or large fuel penalty.
Fuel Capacity is simply the maximum fuel that can be loaded onto that aircraft.
Game-Estimated Maximum Flight Time is the flight time that Infinite Flight tells you when you fully fuel your aircraft.
Theoretical Maximum Flight Time is the flight time calculated from these numbers that is theoretically possibly, waiving all IFR altitude rules and reserve fuel rules.
Practical Maximum Flight Time is the flight time calculated from these numbers that takes into account a 90% passenger and 75% cargo load (75% cargo load only for the Freighter), IFR altitude rules, and reserve fuel rules.
Flight Profiles are the ideal sequences of cruise altitudes for an aircraft at different loads.
Disclaimer I : Numbers are from solo testing and have not been tested live yet.
Disclaimer II : The 757 has speed dip, meaning it sits at M 0.79 when set to 0.80. Measurements were taken with the AP at 0.80.
Disclaimer III : To keep it simple, I only took measurements every 10% load. If there were huge drops in fuel burn over those 10% I tried to take them into account when determining the climb profile.
Disclaimer IV : I am assuming linear rate of change of fuel burn between 10% increments. This is likely not the case, but it should be close enough.
Disclaimer V : Numbers in charts are in pounds. Works all the same for kilograms just different numbers.
Fuel Capacity : 76,968 lbs or 34,912 kg
Game-Estimated Maximum Flight Time : 10hr 17m
Theoretical Maximum Flight Time : 11hr 41m
Practical Maximum Flight Time : 9hr 53m (Eastbound) | 9hr 49m (Westbound)
Flight Profile (East): FL310 (100%-41%), FL390 (40%-21%), FL410 (20%-0%)
Flight Profile (West): FL300 (100%-71%), FL320 (70%-41%), FL400 (40%-0%)
The 757 burns fuel predictably and reasonably. No need to pack a ton extra.
The 757 is not the most efficient at standard altitudes. You don’t need to avoid FL330-FL380, however, as the numbers aren’t that different.
The 757 is forgiving. Even if you pick the wrong altitudes, it won’t bite you.