Originally Posted by
john_tullamarine
Don't think so.
The air, coming from the right, is turned aft ie no acceleration back toward the right (unless you are considering the decelerating component). It is the turning from moving left to aft that generates a force with forward and left components and a left yawing moment as a consequence ?
It's either turned, or not turned. If it's turned, it's accelerated.
I'm seeing your misconception. You've gotta think of the
change in direction, not just the final direction. You're correct that the final direction has no rightward component (it's just going straight down the intake, aka "aft") but that doesn't matter. It was originally going left, and now it's not, which is a
change (i.e., acceleration) to the right.