On Jan 18, 10:52 am, "Herb" wrote:
Now if Karl WOULD bring a hawk on the flight to Chicago and if the hawk
WOULD decide to spend time flying up and down the aisle - would the ac
then consume less fuel due to the reduced weight?
My answer is of course NO since the fuselage is a closed and static
system (although there is obviously an air exchange) and as such the
total mass would not change. Any other opinions?

Herb, J7

Well, any sensible hawk would fly up to first class for better food.
Then, passengers would run aft, thereby decreasing trim drag.
So, less fuel consumption but possibly an interesting landing ?
See ya, Dave