What was the car’s mass? What was the driver’s mass, and the mass of gas, fluids and anything else in the car? At what angle did the car fall and what is the drag coefficient and surface area at that angle? What was the angle of launch? Is it flat, downhill or uphill towards the edge?
Even with that I can’t do right. Cars tend to fall somewhat flat on their bellies, but shift around as they go, constantly changing the drag. My estimate of time, speed and distance is completely off if the terminal velocity is less than the straight gravity-based calculation.
Post 110
LOL, Eviel Kneivel had a lot to consider when staging his stunts, then he bet his life on the results. Seems though, based on his many injuries, that he did make occasional errors.