crash start launch

Bennett, don't read this-- it concerns the adventure you will be
going through shortly thanks.

Hi. Any ideas about the length of time involved in going from a
ship with only its power plant running for essential services
(lights, some computer functions, etc.) to a launch in a real hurry?
Specifically, the end of Legend of the Sky Raiders adventure, which
I shall be running for the third time (its fun). The idea is that the
characters take the ship by force while it`s sitting at the landing
sight and wish to leave as soon as possible. In addition, the pilot
in question is probably not familiar with the far trader and is certainly
not familiar with the current panel configurations as customized by
the ship's normal pilot. Thoughts?