Quote:
Originally Posted by jamesqf
Right. And it comes as a surprise that cruising at 299 mph burns more fuel than cruising at 245 mph?
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I am afraid it is not entirely correct. 299mph is max cruising speed. If you need max range, you fly at economy speed and it is determined by mass, shape and propeller, so it should be pretty similar for both planes (EDIT: I must admit, I cannot prove it - I cannot find the corrrect data).
Lets do simple math:
1544 miles div 120 gals is 12.86 mpg
1150 miles div 170 gals is 6.76 mpg
500 vs 350 hp means 42% more power
6.76 vs 12.86 mpg means 52 % more consumption
Here you go. In similar aplications, turbine loses roughly ten percent in efficiency.