[nanomonkey]

Out of curiosity, can this geometry be used for building electric cargo bikes/trikes. I'm always on the lookout for geometry that gives the same tilting gravitational forces as a bicycle but with the ability to be stable when stopped, and this looks promising.

[CRConrad]

The geometry, with the front and rear axles turning on opposedly-angled tilted axes, looks identical to that of (the old four-wheeled kind of) roller skates. Swiveling the axles into a turn makes the whole thing tilt -- and conversely, tilting it swivels the axles so it turns.

[CRConrad]

And of course, come to think of it, skateboards.

Were those originally invented by nailing rollerskate trucks under a plank, or what? I'm fairly sure skateboards use bigger -- certainly wider -- trucks nowadays, but rollerskates definitely predate at lest the "modern" (i.e. post-1970s) skateboard boom... Just a WAG.

[ragebol]

I don't think just geometry will give you any of that. Weight distribution and dynamics might.

[nanomonkey]

Hmmm...looking at the images the wheels rotate inward allowing a natural turn, while the center piece tilts in towards the center of the turn, so I think it does in fact allow you to tilt into a turn and thus be forced into your seat, the same way as a bike.

[spiderice]

Are you not just describing a skateboard?