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[Wing Walker]

Apparently the fuel range in relation to altitude is backwards to how it works in real life.

Making a recent mission dealing with fuel range and real life stats, the a/c I am working with would escort bombers to the limit of their "combat range" where they would be up at around 25,000ft, though max range is achieved at 10,000ft.

I tested if there is a difference in range at the two altitudes. 

With one a/c at 10,000 and the other at 25,000ft, the a/c at 25,000ft had the higher True Air Speed, which in the same amount of time gave a greater range than the one at 10,000ft.

So there seems to be no factor in the FM to affect range with altitude, other than time+speed.

 



This is in relation to another post of mine, but is a factor that I thought was significant enough for flying and mission making in BAT to post separately. 

[WxTech]

If fuel consumption were to be set principally by the power output for the motor in question, then the relationship you found would make sense.

It's possible to cook up a test version of whichever class (perhaps.Motor.class?) applies the fuel consumption calculation and report the value on screen as text via the addition of a line of code at the appropriate place using the HUD.training() method. I FREQUENTLY do this as a means to check on my own alterations and additions in all manner of classes.

The altered class would need to be compatible with the game version and whatever mod(s) one has using that same already modded class. For instance, Motor.class is touched for the full throttle smoke mod.

[Dimlee]

And once again, I was inspired by Wing Walker's post to do some tests... 

I had an unfinished mission of Ar 234 B1 flying photo recon over Egypt. The mission was done some years ago in an earlier version of BAT. The purpose was to do the flight at almost maximum range and with speed/altitude combination as described in the books about Ar 234.
Duration 110-120 min and the fuel upon the landing 10%-15%. Altitude 7,000-8,000 m.

I added the second Ar 234 B1 flying the same route as the first Arado with the same TAS but at 2,000 m. Also reduced the flak intensity and the number of enemy a/c to make sure both Ar 234s land safely. Played new mission several times with one aircraft in autopilot mode and another one as AI.
Result: the 1st (high-flying) Arado lands with 15% fuel and the 2nd (low-flying) one with 20% fuel. 
5% gain can be explained by less time in the air. But the fuel consumption of Jumo 004 in the game does not decrease with altitude... unless I miss something.
Modified mission with two Ar 234 B1:
https://www.mediafire.com/file/xqyw6rp6sqmytmy/Ar_234_range_test_v2.zip/file