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keisanHigh-precision calculations for everyday life and work

Hill Climb Power Measurement Ver. 2

Author: kwsmExecutions: 3841

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Calculates average power based on the time taken to climb a paved road by bicycle.
Please use this to verify the accuracy of your power meter’s readings, among other things.
Distance
km
Starting Elevation
m
Elevation at the Finish Line
m
Total descent altitude
m
Total Weight
kg
Aerodynamic drag coefficient (CdA × standard atmospheric density / 2)
kg/m
Drafting Coefficient (Air Resistance Reduction Ratio)
Rolling Resistance Coefficient
Time
Minutes
seconds
Average Power W
Do not use the distance and elevation data posted on the event’s official website, as it is often inaccurate.
It is recommended to obtain distance data from Google Maps and elevation data from the Geospatial Information Authority of Japan’s website.
Please adjust the drag coefficient and rolling resistance coefficient for each individual and piece of equipment to values that ensure consistency across multiple data sets.
Set the drafting coefficient to 0.5–0.6 when in a fully attached position, and adjust it based on the duration of the drafting.
[Ver. 2]
Added an error correction function based on total descent elevation when the course includes downhill sections.
Errors are prone to occur on flat to gently sloping sections, so either divide the section into segments, or
for short distances, add “flat distance (km) × 10” to the total descent elevation to correct for this to some extent.
However, please note that the system still struggles with staircases and curved elevation profiles.

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