mike regish writes:

I'm sure he meant to reduce power in order to not exceed Vne.

You reach Vne quickly in a parabola. Remember, you have to accelerate
downwards at 1 G in order to maintain the zero-G state. In five seconds your
rate of descent from the top of the parabola must be 9600 fpm, or 95 kts
_straight down_ (and thus much faster if you are also moving forward).

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