Greg LeMond’s New 26 LB. Carbon Fiber Ebike

Re:Greg LeMond’s New 26 LB. Carbon Fiber Ebike by ncmncm on Friday November 27, 2020 @05:07PM (#25232988)

I don't understand why you need to measure anything but instantaneous crank torque, speed, and (for completeness) pitch angle. Integrating power in vs acceleration out, the difference is loss. What am I missing? Does bad posture waste energy before it reaches the crank?

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Re:Greg LeMond’s New 26 LB. Carbon Fiber Ebike by hazeii on Saturday November 28, 2020 @03:36AM (#25236247)

In an ideal world with zero friction, zero wind, constant air density and no other losses that would be true. There are a few outfits using this approach, so we are the outliers (being the only ones doing it via direct force measurement, for which we have the patent).

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Re:Greg LeMond’s New 26 LB. Carbon Fiber Ebike by ncmncm on Saturday November 28, 2020 @04:54AM (#25236610)

The difference between energy in and work out is, exactly, friction, wind, and "other losses", so you have not said anything meaningful. That is your right, but then why answer at all?

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Re:Greg LeMond’s New 26 LB. Carbon Fiber Ebike by mulmen on Friday November 27, 2020 @06:37PM (#25233577)

Depends if you want to answer “what” or “why”.

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