Pretty much all I remember. I read it somewhere between the late 70's to late 80's. If a ship has 3 drive coils it can run steady as cruising speed, or run at triple speed for 8 hours... I remember one scene where a ship is fleeing and the pilot has to choose between running full out hoping to get out of sensor range but if they fail to evade they are dead in the water when pursuers catch up.

Thanks for any help,