Airtime

Actually Micheal Answerman is right. Mass has the greatest influence on air resistance. The higher, the less it is un effected by it. However, 70 Kilo grams with the area of a human wont reach terminal velocity in less then 500 feet nor will a 5 ton coaster train. The two objects will hit the ground at the same time or within a margin of milliseconds when dropped from 10 feet and a margin of half a second from 420 feet. This may not provide perfect zero Gs, but the difference will be 0.1 - 0.05. In this instance even though it may not be perfect, the margin will not be noticed. Scince it will not be noticed it is not worth mentioning. You have to understand that on this board, there is no reason bring up anything about wind resistance if it has no real relevance. Its effects are minimal and will have little to no effect on the ride's performance. Be it as it may, air resistance does exist. However, you will experience zero Gs even in the light of air resistance.

As for the third thing i havent edited any of my posts in response to your acuasations. Look at the date edited, it was a typo. I was explaining that that WT only experiences zero gs at the very top because it is the only point when the entire train is completely vertical. Because there is a period in when the front car is vertical but the rest of the train takes a little bit before the rear car goes vertical. Only then will you get zero g. At 0 degrees, you deccellerate only to friction, at 45 degrees, you deccellerate by -.5 Gs, and at 90 degrees, you deccellerate at -1 G. 1 G ( which is normal gravity) - 1 G = 0 G. So when the rear end of the train is still pulling up, say the rear car is at 45 and the front is 90. It will reach a dynamic equilibrium 1/4 G and will steadily drop until the entire train is vertical. In Top Thrill, the pull up is much larger, so once the front car goes 90 degrees the rear car will be at 85ish and in an instant later it will be vertical too. So it will not have this problem.