In those days games came with hefty manuals. I particularly remember learning the rudiments of flying a helicopter from Gunship's manual.
You can see for yourself on this PDF, starting on page 38:
http://www.simwarrior.com/gunship/utilities/GSManUK.pdf
Edit: this is Comanche's manual:
http://www.starehry.eu/download/simulation/docs/Comanche-Man...