disco_air
You have already asked this question. Maybe you should re-read the thread or better still I will reproduce it for you.
You wrote:
By your theory, 404 Titan, if the birds all flew towards the back of the aircraft (lets assume they stay airborne), since the weight hasn't disappeared, does that mean the aircraft's CofG will move rearwards in flight, causing it to pitch up with all else being equal?
I wrote:
Yes the CofG will change as the birds become airborne compared to when they were perched but the weight will remain the same. That is the question that was originally asked. As I have previously alluded to the weight of the birds when airborne will be evenly distributed across the floor of the aircraft by the air. Therefore the CofG won’t change if the birds fly from the front of the aircraft to the rear as long as they don’t become grounded. If they walked to the front or rear then this is a different story.