I'm not sure where the confusion is coming into this. Rim weighted yoyos have more angular momentum, so they spin longer.
The idea that a center weighted yoyo has more friction is ridiculous.
I think assuming stuff while ignoring the equations governing friction is ridiculous. I'm not a tribologist but I am a chemist who studies materials with important tribological properties and I like to think i know quite a bit about friction. Energy lost to friction is mu times the integration of force times xd(x). Number of revolutions matters. A faster spinning yoyo (center weight) will complete more rev per sec meaning more energy lost to friction per second.
You are ignoring distance traveled.
Honestly I think most of our discussion is irrelevant to real world yoyo play as a rim weighted yoyo converts translational motion of the throw into rotational more efficiently so you are starting off with more rotational energy from the start anyway. This is my guess as what the key factor in all this really is.
« Last Edit: November 28, 2011, 02:12:38 AM by R-fly »