Dual Contra-Rotating Ducted Fan Prototype: Single Motor, 3D Printed

Super jank, but YouTube comments were SO helpful for the last EDF project, would love some feedback for this one as well!

References:
https://www.youtube.com/watch?app=desktop&v=kJoge2TKiDg Coaxial Demonstration - Engine On (clip 5:43-5:53)
https://apps.dtic.mil/sti/trecms/pdf/AD1200423.pdf "EVALUATION OF A COUNTER-ROTATING ELECTRIC
DUCTED FAN" - Navy