Make: Online : Custom-built planetary gear unicycle transmission

Custom-built planetary gear unicycle transmission

greg harper planetary unicycle hub.JPG

Wrapping up my trifecta of epicyclic gear posts today (1, 2) is this practical application from Greg Harper, a resident engineer at the University of Washington's Center for Experimental Nuclear Physics and Astrophysics, who put together a custom epicyclic gear train for his unicycle hub. Designed for speed, the hub gives 1.5 rotations of the wheel for each rotation of the pedals.

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Posted by: Berend on September 1, 2009 at 2:39 PM

I have this site in my bookmarks, and sometimes, when I need some technical simplicity and beauty, I visit it:
http://kmoddl.library.cornell.edu/model.php?m=468&movie=show

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