Draisine pedaled by two persons.
https://s3-us-west-1.amazonaws.com/h...e_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...588#post170377
https://www.homemadetools.net/forum/...032#post168307
https://www.homemadetools.net/forum/...646#post104908
https://www.homemadetools.net/forum/...229#post145964
https://www.homemadetools.net/forum/...976#post137677
https://www.homemadetools.net/forum/...608#post159136