Do the newer DA-20’s or Cirrus SR-22 make fuel burn calculations?
I must admit, I have no idea but I am curious.
We often play around with the math in the Embraer to see what uses more gas, stay high and then basically idle all the way down, versus a sooner, more gradual descent for example. We can program all that in the computer and the plane will come up with a calculation on the remaining fuel upon landing. The results are often quite surprising to me. On long descents, the conditions like wind and temperature can change quite a bit.
We do it mostly as a contest to see who is better at calculating the more efficient burn, of course. The Embraer actually does quite well in calculating the most efficient cruise speed without my help. In fact, she probably does better without me “helping”. Most Cessna 172’s I have flown however, do not calculate much, lol.
And we usually don’t shut the engines off on descent just to save gas.