On Sunday, June 2, 2019 at 9:40:05 AM UTC-7, AMuzi wrote:
On 6/2/2019 11:18 AM, Frank Krygowski wrote:
On 6/2/2019 5:48 AM, John B. Slocomb wrote:

See https://www.youtube.com/watch?v=-9gQ1KRhesM

In the narration he mentions that a 24 speed gear set, or
even more,
would be perfectly feasible. No wires, no cables, either.

I estimate that a New! Innovative! Revolutionary! Better!
bicycle transmission has been invented every two years or so.


I would expect a hypoid gear set in an oil bath to be
relatively efficient compared to a chain. Any ME comments on
an open crown & pinion set?

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

The problems with all of these "concept" drives is that they place an offset force pushing the gears apart verses that chain drive where all of the off-setting forces are in a more or less straight line with the frame.