TheRhino wrote:
Only cadance is used in calculating power (excepting the Powertap) so smudgy dots could mean imprecise power then as well I take it?Yup, that's why I look at the quality of the cadence signal. Except for the Power Tap (and the old Polar chain-based PM and the iBike) you have to have both torque and rotational speed of the crank (that is, cadence) in order to calculate power. One of the idiosyncrasies of using non-round chainrings is that the rotational speed of the crank isn't constant so you can get a biased estimate of power if you don't take that into account.
Tom A. wrote:
Yes. That's very cool...but, assuming the lower right PM was not the PT, does that mean that he didn't pair the separate head units to the same wheel speed sensor for the Quarq, Stages, and Vector? I'm not sure why he'd do that...I think it just fell through the cracks. Synchronizing all four power meters and zeroing them and doing all that other preparatory crap is unnatural and, in many ways, we should be thankful that Ray takes so much care and overlooks so few things. You and I know that doing careful testing is way harder than people think.