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Re:Cleo Robotics Demonstrates Uniquely Clever Ducted Fan Drone by cma on Tuesday February 13, 2018 @07:30PM (#16372311)
It could all be done with weight shifting:

https://en.wikipedia.org/wiki/Hiller_VZ-1_Pawnee

Maybe shifting the battery?

I can't remember the details but as you shift weight and begin moving laterally, when you pick up lateral speed it interferes with the ducting effect or enhances it in some way can counter reacts against the movement, giving dynamic stability.

Re:Cleo Robotics Demonstrates Uniquely Clever Ducted Fan Drone by elihu on Tuesday February 13, 2018 @07:34PM (#16372334)
For what it's worth, the article says it isn't done with movable weights.