This is not the first time that a
Lego CVT appears on this blog, but this one uses a different mechanism than all the previous appearances of this kind of
gearbox, it uses a
chain, like Bikes do, this solves some problems of the other CVT's like
friction ans
slippage.
View the
full article at
LEGOISM web (Highly recommended site) and/or the video here, very instructive and well explained.