Blueskies wrote:
Yes, the aerodynamic loads are highest early in the flight so the engines are throttled then back up. The shuttle rolls
over on its back to fake the occupants into feeling 3 gs when in fact the vehicle is pushing 4 gs....



That also lowers stress on the wings; the Bomarc ramjet missile used to
roll belly-up on the bearing to its target after liftoff, then turn
right-side up once in basically horizontal flight.

Pat