What types of motors are necessary to achieve altitudes approaching 470,000 feet?

Answer

High-power rocketry motors classified in O, P, Q, or N categories

The sheer altitude demands the use of high-power rocketry motors, specifically those falling into the O, P, Q, or N categories, characterized by massive total impulse.

What types of motors are necessary to achieve altitudes approaching 470,000 feet?
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