A Goodreads user
A Goodreads user asked Ray Gorham:

In 77 Days in September, is the flight profile of the missile based on a real missile? I noticed that it was stated that it reached 82 miles altitude in 73 seconds, which seems like an extremely rapid ascent, even if it did not start its pitchover during that time.

Ray Gorham Hi Vareck. I tried but couldn't find any information on missile ascent times, so I just made it up and tried to sound authoritative. Not sure if it was close, hopefully not too far off.

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