I have another confusing question:
5. Two identical turbojets are at the same altitude and same speed and have the same specific fuel consumption. Plane 1 weighs 130,000kg and the fuel flow is 4,300kg/hr. If plane 2 weighs 115,000kg, what is the fuel flow?
A) 3804kg/hr
B) 4044kg/hr
C) 3364kg/hr
D) 3530kg/hr
One set of feedback gives (A) as the answer and another gives (C). The difference being that to get 3364kg/hr the masses of the aircraft are squared instead of the direct ratio method that I used in getting 3804kg/hr?
Why on earth would I square the aircraft mass?
Thanks
0918