Those are "undercarriage ball condenser coils ... " , not wheels.. :-)
Caption for above pic of flying thingy
One frame of famous motion picture footage taken by Adamski in Silver Springs, MD in Feb 1965, just a month before his last birthday and passing .... Scout moves between trees, and extends and retracts one of its three ball undercarriage ball condenser coils ...
I'm not sure how many balls it takes to get one of thse puppies to fly,, but.. :-|