This penny-farthing hoverboard is a pretty old-fashioned piece of new technology!
The penny farthing was a notoriously difficult cycle to ride, given its disproportionate wheel size. The idea behind it was rather elementary, in that if you make the pedaling wheel larger, it covers more of a distance, giving you more speed. This was long before geared bicycles were even a concept. The penny farthing, although a pretty impractical bicycle framework, got memorialized simply for its memorable silhouette… and with Ye Jin Jung and PDF Haus’s latest hoverboard de
发布于2019-11-18