Strangely, the Dynasphere Was Never a Commercial Success

We've seen monowheels before, but what made J.H. Purves's design different from the rest was that it could stand up on its own. Allegedly, it could go up to thirty miles an hour. But as you can see from the above photo, it had at least one serious design flaw.

Link -via Retronaut | Photo via Douglas Self

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