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Old 2019-03-24, 06:38 PM   #15
mowcius
2017 UK Road Race Champion
 
Join Date: Jul 2009
Location: Leeds, W. Yorks. Unicycles: KH36/32, KH36 (stolen), KHF29, KH24, 19" Gravity, 20" BC
Posts: 1,229
I've only just realised how the gearing works on the MC2.

The prototype version used a second disk brake for gear changes. The new version omits this so perhaps a drum brake type arrangement to do the same thing?
(https://www.youtube.com/watch?v=CLXn...=youtu.be&t=57)
Think of the disk brake as the reaction arm on a standard hub. If you're in low gear and the reaction arm isn't attached to anything, everything turns at 1:1 (including the reaction arm). As soon as you lock the reaction arm, the planetary gears are engaged and you're in high gear.

What I can't quite wrap my head around is what happens if you drag the gear shifting (reaction arm) disk brake rather than locking it on? Do you get a really crude CVT?

Also, if you removed the freewheel and quickly changed direction while in low gear (spinning reaction "arm"), would it just change direction, or would something weird happen?
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Last edited by mowcius; 2019-03-24 at 06:39 PM.
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