The EDWARD electric diwheel by the University of Adelaide's School of Mechanical Engineering. 5:10 video.
https://www.youtube.com/watch?v=Uf6Gh-hPDeo
More:
https://en.wikipedia.org/wiki/Dicycle
Previously:
https://www.homemadetools.net/forum/...714#post159561
https://www.homemadetools.net/forum/...426#post150938
https://www.homemadetools.net/forum/...436#post131673
