|Re: OT: Continuously Variable Gear Transmission|
Message #6 Posted by bill platt on 14 May 2010, 7:28 p.m.,
in response to message #5 by Garth Wilson
Wow, I haven't talked about this in years! Half-step versus "alpine" and some other gearing ideas. I also made extensive calculations as a kid--by hand (except for my trusty hp) with "sawtooth" diagrams to show the shift sequence.
But in racing, all those ideas went out the window by the time I was racing in the 80s--and it was simply "straight block" . There was one race, in Hagerstown, in the rain, as a junior, when I rand a 15-17-19-21-24 but every other race I have ever done has been in a straight block at least for the 4 smallest cogs.
It is interesting to see old racing bikes from the 60s with close spaced front chainrings--49/52 even! And in the back, a 14-16-18-21-24.
By the way, I have a Huret jubilee, two Suntour Superbe pro, a SunTour Cyclone, and both a Nuovo and a Super Record rear derailleurs. The newest campagnolo carbon units are still heavier than the old cyclone and jubilee--though they sure do shift better.
Edited: 14 May 2010, 7:32 p.m.