Ok, so the season 2 ending of Rebels was great. But seriously, what was with the Saber-copter thing? Can a spinning duel lightsabers allow you to fly? My answer...NO! Talk about a nightmare that would be if Sith and Inquisitors just chase you like that.
I have heard friends talk about other people asking about it in THIER games, "yadda yadda perhaps a repulsers in the blade to give lift blah blah" and other theories.
My thought is after watching the show and noticing how the Inquisitors do it, they are not using the saber to give them lift, rather they leap and let the saber extend and slow their fall.
Here is my interpretation on how it can work. Pure and simple its the Enhance "Force Leap" power. Used in conjunction with the saber and an Athletics skill check (hard one I would say as unlike a real helicopter, the Force user doesn't have a back rotter to keep him/her from spinning around out of control), it can be used to extend the range of a Force Leap by one range band. So combine this with the Range add on for the Force Leap and you go from Medium range to Long range...as long as you can make the check.
If you don't succeed, you don't go as far as you want, but if you Despair...well remember the one Inquisitor who fell off the pyramid after his damaged saber went kaput? Yeah,,,SPLAT!