Rolling resistance coefficient @5°C (Crr) 0.0075
Cheap DIY bike system monitoring CdA (aero drag) and Crr (rolling resistance) coefficients, with an Android app connected to an anemometer, a powermeter, and a speed sensor.
Thursday, December 31, 2020
Wednesday, December 30, 2020
Chain losses
It seems that the lower the speed, the lower the chain losses. The auto-zero feature of my G3 has a flaw which explains the variations (0-7%). But there is one moment (near 1 hour) where no coasting happened and chain losses decreased from 2% (@40km/h) to 0% (@20km/h).
Monday, December 28, 2020
Live CdA
Lot of data to monitor today: instantaneous wind, estimated chain loss (30s average) and real time CdA (~60s average, +/-0.005 precision). Fun to play with the last feature to set a low mark at 0.285. Again seen some oddities to food the geek mind during this cold ride.
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