Strengthen a hand crank excercise bicycle

Requested Project

A specially modified tricycle with a hand crank and a chain drive for the front wheel was inoperative because the chain kept coming off the sprockets.  Design modification necessary because the structure was too flexible.

Design Notes

Add a brace between the wheel hub and the chain guard assembly, and a second bolt to anchor the wheel hub.  Need continuing feedback to tell if this modification adds sufficient strength to stand up under use.

RCRV designer is Donald Grimm, and was requested by GWAEA Coralville, Jan Ahlberg. The project was begun Oct 26, 2001 and completed Oct 26, 2001.


2021 RCRV