Rider power/kg at #TdF15
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Disclaimer: power estimates calculated by this formulas can give estimates for a given climb but are suspect to error. These errors can lead up to 1 W/kg if estimates are not chosen carefully. If you use this for a blogpost or publication or want to know more details, please refer to: http://thijsvandenbrande.be/2015/07/over-de-onzin-van-wattage-wiskunde-van-dopingjagers/ (dutch)
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Rider properties
Thermodynamical properties
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weight88kgrho air1.17kg/m3
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A0.45gravitational constant9.81kg/s²
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Cd0.493-temperature30°C
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drag reduction1.000avarage altitude952.5m
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A*Cd0.222atmospheric pressure101525Pa
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Material properties
ride properties
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bike weight10kgspeed8.00km/h
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cycling kit0.25kg2.22m/s
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cycling shoes0.512kgtime0:45:00
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helmet weight0.25kgdistance6.00km
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bidon weight1kggradient7.4%
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additional weight
0.5kgheadwind-1m/s
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bike performance
97.5%rolling resistance0.004-
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transmission losses
2.5%% of time in peleton0
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total weight extra
2.512kg
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calculations
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drag force0.4watt
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rolling resistance
8.8watt
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conquering gravity
162.1watt
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net total171.3watt
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losses in the bike
4.4watt
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gross total175.7watt
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transmission losses
4.4watt
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total watt180.1watt
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watt/kg2.05W/kg
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Watt calculations
My calculation of Froome on col saint-martin