Thread: Same Wattage: Headwind vs Tailwind
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Old 05-15-25 | 12:56 PM
  #69  
tomato coupe
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Originally Posted by PeteHski
mmmmm…. I thought it was approx 1/3, but maybe I’m thinking of the combined CdA scaling.

Some info here:-

https://pubmed.ncbi.nlm.nih.gov/11560092/
It looks like they came up with an empirical value of .76. The rough estimate* comes from:

area ~ r^2
mass ~ r^3
therefore, area ~ mass^(2/3)

* assuming a spherical cow
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