RE: CG location when fuel is burned
Da_rock,
Even though there may be thousands of acting moments that determine CG (the entire AC) only one is changing from start to finish of the flight and that is fuel tank.
Therefore it is (i think) justified to neglect all but this moment in calculating a change in CG position.
John,
you wrote:
"Then the distance of this calculated moment is: New Dist to CG from Leading edge = dist * (ACEWT + FUELWT) / New total weight"
and then:
"Since the total weight is ACEWT + FUELWT "
But I say this is not true. We need to compare beginning of flight to end of flight (fuel consumed) and therefore, total weight does not equal the same "ACEWT + FUELWT" because FUELWT has changed and that is why dist has change too