A prop rod with no power that runs downwind faster than the wind speed.
And the followup:
You may also like
By Steve Manganelli The 26th annual (and first Post-Covid) American Institute of Aeronautics and Astronautics (AIAA) Design Build Fly (DBF) Competition took […]
The following articles sent in by Jon Graber: Alia Electric Aircraft Japan’s first Flying Car Manganese for EV Batteries […]
Thanks to Mike B.