interesting bicycle gearbox

[def215]

i hope this hasnt been posted here yet or else i would just be redundant. but i saw this bicycle gearbox on instructables.com and thought it was pretty interesting.

here is the link to the build:
http://www.instructables.com/id/transparent-gearbox-on-a-homemade-bicycle/

i thought it could be interesting to others if they would like to possibly make a trans for electric drive. and also it reminds me of a trans that ive seen around here before. :wink:

 

[StudEbiker]

Very cool, there have been some threads concerning a transmission like this, but I don't know that anyone here has built one. Nice to see an instructable for it!