Originally Posted by
awblain
A sq,
The three concentric shafts on the engines swap direction from inside to outside - but all the same way on all of the engines.
It avoids the need for a set of stator vanes between intermediate and high-pressure components, at the expense of scarier bearings.
Right, I'm aware that there's counter rotating spools in the same engine, I thought we were talking about having left and right engines rotate in opposite directions.