Originally Posted by
Kimmo
Before you can hope to make the slightest dent in my enthusiasm for this concept, how about demonstrating that you grasp the mathematical and physical constraints that I'm railing against here.
Do you spend much time trying to go fast in street clothes, while trying not to raise a sweat?
More cogs has not given us ratios as close as those of us who fully grasp the concept of gear ratios might reasonably desire.
The straight line of a corn cob cassette is actually a steepening curve, when you understand the ratios. And when you grasp the physics, you realise the curve is in the wrong direction.
In the end the combination of competition and marketing will unearth this fact for all, to take someone else's* word for.
* ie not some random dude on the internet extolling folks to figure it out for themselves, but glossy brochures and slick webpages and videos from trusted brand names.
Seems to me you are more or less building a CVT (constant velocity transmission)....which is a very hot topic in the automotive world, some of the same factors apply.....being able to optimize efficiency. Technology allows progress on ideas that have been around for as long as there have been machines.
Memory tells me there was some work being done at one time on a chainring that could alter it's pitch dia on the fly ??
Bill