Looking at the linkage from the steering wheel, it appears that what happens is when the wheel is turned, it moves the rider in or out of the center of the big wheel causing his weight shift to steer the device.
Of course, I could be full of shit, too.
This might the one time you aren't. It's either how you describe or turning the steering wheel causes the bit wheel to tilt, accomplishing the same thing.
Here's what I suppose is a later version of the thing. It's certainly more refined:
Last edited by NQ6U; 12-12-2016 at 12:35 PM.
All the world’s a stage, but obviously the play is unrehearsed and everybody is ad-libbing his lines. Maybe that’s why it’s hard to tell if we’re living in a tragedy or a farce.