trail wrote:
MattyK wrote:
(*sort of directly. Let's not dig too deep)
Well then don't use a phrase like "actually directly measure" in front of an engineer when the more accurate phrase is "indirectly estimate." :)
As far as I can figure, a power meter's strain gauges' measurement of torque is no less a "measurement" than what a scale does to measure the weight of an object. Hang an object from a spring, make notice of how much the spring ( which you have calibrated) stretches, and you have measured weight. How is the power meter's strain gauge any different in its essence? The strain gauge measures force, and it's a trivial matter to calculate, (measure!) torque from that. Cadence itself is measured, distance, (use a ruler to measure the radius of the wheel,) vs time, (use a clock.)
Last edited by:
DJFaithful: Mar 21, 18 13:04