(please give constructive comments about anything in this instructable...especially about the usage of terms)
This is a plate and wheel model, basically the IVT part works by moving the wheel nearer or further from the center of the plate. The nearer a point is to the center of the plate, the slower it moves and thus turns the wheel slower but with more torque. The CVT part is the fly wheel which "contracts" along its axis when spun and thus, moving the wheel further from the center of the plate.
due to some unknown problems, i am unable to add photo notes or embed my video, please bare with me while i try and fix this problem
oh, by the way, i am in the 13-18 category.
Alright, as pointed out by fellow user jj.inc:
"Actually, just for informational purpose, this is a CVT only, not an IVT. An IVT can output at such a low gear that there is no output at all. A ∞:0 ratio is not possible with this device, so it is a CVT which from ratio A:X to ratio B:X where X ≠ 0 can have infinite variance."
learn more about CVT and IVT by just google-ing it
Step 1: Plate and Wheel Assembly
i use wheels with tires to get a good grip on the CD, it might be better to make holes in the CD for the Legos to attach better
next you would want to get a wheel with its tire as the driven wheel, make sure you use one with good grip, the bigger the wheel you use(diameter) the slower it goes, but with more torque
Step 2: Flywheel Assembly
Remember to add a rubber-band or two or the flywheel might not return to its default configuration, selecting the rubber band requires some trial and error as there are many variables.
Step 3: Powering the Unit
here i used two 5000rpm lego motors with very very low torque, so i geared it down a little (1:3 i think)
but feel free to use anything you like