AdamFrisch
The speed you would need to fly for maximum time aloft is Vx corrected by weight and not so high up as it decreases endurance. I'd say that is about 1700 to 1800 rpm on a c152. If you slow down past Vx you enter the reverse command region and you will need more power to maintain altitude.
Maximum range on non wind conditions is Vy, again corrected for weight and altitude.
I think I once tried the max endurance thing on msfs and the thing went on for like 10hrs on a 172 (I accelerated the sim time of course)
