CVT, which teams are planning on using them for next year?

[John Wanninger]

Originally Posted by Veselin Kolev

...The hard part is how to reliably controll the distance between the pulleys. If that was figured out, CVT would be a joke for me. But untill then, I'm cadding new ideas.

I believe a spring on the output pulley forces those split sheaves together, which tensions the belt which spreads out the sheaves on the input shaft. The weights on the input shaft, through cam action, apply a counteracting force to push the sheaves together.
Someone correct me if I'm wrong here but I believe, additionally, the belt will tend to seek greater mechanical advantage by riding lower in the input shaft groove when it encounters a load. As the load increases, the ratio adjusts for greater mechanical advantage, and the input sheaves spread apart until reaching an equilibrium with the sheave "squeeze" force resulting from rotating weights. As the motor goes faster and/or the load decreases, the input sheaves are forced together, until there is a new equilibrium point, and of course, a new ratio.