Your point on that video? That cargo plane was on take off, hence the extreme climb, then lost its engines, and could not continue its take off acceleration. No air speed, no lift, while it was trying to take, no resistance to drag, and no climb. It only appeared to climb a short distance (and there may have been some because there was still a bit of lift and the momentum) after the loss of engines because of the camera angle. It was still balanced until stall eliminated all lift. It still had its nose and unless it’s cargo all shifted backwards toward the tail, it was balanced. That plane had other problems which caused the engines to stop producing thrust and caused it go into an obvious stall and stop it from flying. There was sound on that video and there was no engine noise. Ergo, no engines were operational working when it appeared on the video.
Your point on that video? That cargo plane was on take off, hence the extreme climb, then lost its engines, and could not continue its take off acceleration.
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That 747 was carrying cargo and had a cargo shift to the rear. It continued to fly afterward for a short time. That’s my point. You specifically said a plane can’t fly unbalanced at all regardless of momentum, and that’s false.
That’s my point.
Actually in the Bagram crash it was an unbalanced load that caused the crash. On climbout under takeoff power a tracked armored vehicle that was improperly lashed broke free of it’s tiedowns shoving all the cargo behind it to the rear of the plane, a 40 ton weight shift. Obviously the plane did not “zoom” upwards even though it was under full power, it stalled immediately and the result was catastrophic. This lends evidence to your scenario.