Drag Coefficient (Cd) for modern TT setup
msigrist358lXCBDS1s
Posts: 1
in Road general
I'd like to develop a simple model that would estimate CdA for a TT rider based on their height and weight.
This article trainingandracingwithapowermeter.com/2011/04/estimation-of-cda-from-anthropometric.html
is a useful starting point.
However it was published 10 years ago and I suspect the drag coefficient of 0.7 is too high given current levels of equipment and knowledge re optimum position.
(It gives CdAs in the 0.25+ range, I think its closer to 0.2 these days and less for the very best riders/equipmet)
I've done a bit of googling but can't find anything more recent.
Does anyone have some more recent data? e.g. has anyone done a wind tunnel test and can share their data?
As an alternative if anyone knows their actual CdA by any means and can share their height/weight this would be an alternative means to sense check how the formulae in the article stack up with real numbers.
This article trainingandracingwithapowermeter.com/2011/04/estimation-of-cda-from-anthropometric.html
is a useful starting point.
However it was published 10 years ago and I suspect the drag coefficient of 0.7 is too high given current levels of equipment and knowledge re optimum position.
(It gives CdAs in the 0.25+ range, I think its closer to 0.2 these days and less for the very best riders/equipmet)
I've done a bit of googling but can't find anything more recent.
Does anyone have some more recent data? e.g. has anyone done a wind tunnel test and can share their data?
As an alternative if anyone knows their actual CdA by any means and can share their height/weight this would be an alternative means to sense check how the formulae in the article stack up with real numbers.
0
Comments
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BestBikeSplit already does this based on your power numbers and course and weather profile. Might be worth a lookTri Coaching
https://www.h3otriathlon.com0
