Impact Forces vs. Seat Location
Previous posts here have established the following facts relative to impact:- ROD was large.
- Fwd velocity was small.
- Aircraft was in a nose high attitude.
- The nose gear was punched upwards into the cockpit.
The nature of the impact was that those in the aft cabin experienced forces from a vertical velocity equal to ROD mitigated slightly by the frangibility of the tail structure absorbing some of the kinetic energy.
People in the front end experienced impact at a higher velocity. Once the tail hit the ground the vertical kinetic energy acted to rotate the fuselage about the tail (pitch up angle quickly = 0) which increased the vertical velocity of the forward cabin to a value well above ROD. This rotation also created a component of centrifugal force in the forward direction. This might also explain how the engine came to rest forward of the aircraft.