The Dynasphere

I’ve seen a picture of this thing before, but never a promotional video. It’s sort of an overgrown monowheel, invented in 1932. Watch it get speed wobbles at 1:08. It’s not clear if there’s any mechanism to avoid gerbilling.

Still, an impressive engineering feat.

You mean the front/back swing? I think I could see a tad of side wobble @ 1:10.

The wheel is so fat it takes almost no balance skill :sunglasses: