i know, i meant as a redundancy when the other engines are broken.
sn9 did the last half of the flip on a single engine after beginning the flip on two, then it couldn't counteract the rotation given by the two engine start of the flip. but if the flip was started on just one, would it have enough lever to be able to overcome aero forces in order to change it's orientation?
without the hot gas thrusters which the current generation of starships doesn't have. i think the chances of sn16, 17 flying are pretty slim but it's just a hypothetical question.
i'm pretty sure sn8 did the flip on two engines but shortly after one quit completely while the other one started running oxygen (and also engine) rich.