But the main body picked up enough speed to start breaking up when it fell plus it “flew” for a while. The main thing is that the ability to climb is demonstrated.
I disagree. The radar tracks show that the main body did not pick up speed. The break up most likely occurred when the main body started spinning and then when the center wing tank finally did blow when the aircraft was under 7000 feet.
Whether it flew is very problematic. Your flight simulator assumes that the wing will still maintain a proper angle of attack... but calculations show that with the CoG 13 or more feet behind the CoL the aircraft would have pitched up rapidly (in seconds) and the wing would have stalled. Without lift, there would have been no smooth climb.
Again, a climb to any appreciable altitude over its starting altitude takes TIME... and it takes an equal amount of time to fall back to the starting altitude. Time that simply does not exist between the time we know the plane was flying normally and when the crippled main body, minus a wing, disappeared off the radar and into the ocean ~38 to 41 seconds after the initiating event.
Were we to subtract the 7-8 seconds needed for the Zoom Climb scenario to be true, we are left with approximately ~33 seconds to fall 17,000 feet. To accomplish this, we need a fall rate that averages 515 feet per second starting from a downward velocity of ZERO with gravity being the only force acting in that direction. In the first second, the aircraft wreck would only fall 16 feet... and accelerate downward 32 feet per second per second after that until the force of gravity pulling it down is equalled by the force of drag preventing it from accelerating any more - terminal velocity.
Since that 515 feet per second is an average velocity of fall, and since we started with a zero velocity in that vector, the terminal velocity has to be MUCH HIGHER. But the terminal velocity of a falling 747 appears to be only about 450 feet per second... again, the math says there was no Zoom climb.
Let's consider the climb. After the climb was started, 7 - 8 seconds later the noseless aircraft reached terminal altitude, which means it had ZERO upward velocity. It had to climb 3200 feet in those 7-8 seconds... which requires an upwardly vectored average velocity of 457 feet per second. The only force acting on the unpowered climbing aircraft is gravity at 32 ft/sec/sec acceleration - downward. If at the end of the 8th second, the velocity is zero, and the average velocity over those 8 seconds is 457 ft. per second (By the way, according to Boeing, the max climb rate of an average loaded 747 is 100 feet per second under 5000 feet - although it can probably do better ), what is the upward velocity during the FIRST second??? Where did that velocity come from? How many Gs did that force impart to the aircraft to cause such a high upward velocity? Remember, the aircraft will have massive momentum to continue in the direction it is already going. To change that requires the application of a force. A very large force. The only force available, absent the engines, is lift.
We know that before the initiating event the aircraft was climbing normally at 33 ft. per second and traveling north-eastwardly at about 580 ft per second (400 MPH).
Did the plane suddenly and almost instantaneously convert 78% or more of its forward velocity and momentum into upward velocity and momentum? 78% would only get us the average upward velocity needed to move from point A (the start of the climb) to point B (the end of the climb) without allowing for the deceleration being applied at every point between A and B by G.
What force could do that... and how fast did it act? In other words what was the jerk (F/T)? If this force was applied over one second, I calculate it to be about 13 Gs. 13Gs just to change the upward vectored velocity from 33 ft per sec. to the average 457 ft. per second in one second... and it would probably have been a lot more. How could the wing stay attached if it was lift that was the active force? Especially if the initiating event had been the explosion of the Center Wing Tank... which is essentially a box girder that connects the wings to the fuselage in a 747?