Re: Fuel Log
Total A/C HP * %PWR SET = HP ACTUAL
HP * 0.2268 = Kg/Hr
Kg/Hr
_____= L/Hr
0.72
Ex
The ole 180 HP 172 RG.
I cruise at 75% Power
180 * 75% = 135 HP Actual
135 * 0.2268 = 30.618 Kg/Hr
30.618
______= 42.525 L/Hr
0.72
So when I get out at good ole Ibeenherebeforeimsure and it took 4.5 hours, I would expect to be missing 4.5 * 42.525L/Hr of fuel ie 191L.
If I am missing 225L guess what, the next leg plan at 225/4.5 = 50L/hr.
The 0.2268 only works for normally aspirated piston engines.
This little gem helps when the ole headwind kicks in and everyone told you to plan at x amount per hour. ie It gives a realistic fuel consumption based on power set.
0.72