"Danny Deger" wrote in message
...

Why does the shuttle throttle to 3 Gs on ascent?


The 3 G throttling is done late in the flight (about 7:30)and has nothing to
do with dynamic pressure. It was designed in to allow "regular" people fly
the shuttle.

While in the atmosphere the main engines are throttled back to reduce the
maximum aerodynamic pressure. The grain in the SRB is also designed to have
them go through a period of reduced thrust at about the same time.

Danny Deger