Duncan Walker

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Duncan Walker

Duncan Walker

@adwalker71

Husband and Father. Loughborough Academic. Professor of Applied Aerodynamics. Ex rugby player. Fair weather cyclist. Views my own.

Loughborough, England Katılım Temmuz 2009
496 Takip Edilen114 Takipçiler
Duncan Walker
Duncan Walker@adwalker71·
My calculations were based on Stage 15 of the TdF - Plateau de Beille. I took the average values for Pogačar - 15.63 km, 7.9% in 40 minutes. Yes, the gradient and speed varied, and yes, he didn’t get a draft for the whole climb, but the numbers are enough to show it is important.
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Duncan Walker
Duncan Walker@adwalker71·
How did I work this out? If you want to get into the science have a look at the excellent research of Thijs van Druenen and Bert Blocken (doi.org/10.1007/s12283…). I had the pleasure of meeting Professor Blocken at last week’s International Conference on the Engineering of Sport.
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Duncan Walker
Duncan Walker@adwalker71·
Uphill drafting? (📷: charlylopezph) Several pundits have asked how much drafting helps uphill. Enough to save 5% of the riders’ effort. 20-25 watts depending on mass, speed and gradient. Absolutely enough to make a difference. Shows how important those mountain domestiques are.
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Duncan Walker
Duncan Walker@adwalker71·
van Druenen and Blocken show a drafting rider saves about 55% in terms aerodynamic drag. Being proportional to speed squared this is dwarfed on climbs by the effect of gravity. However, elite cyclists are as light as 60 kg and ride at amazing speeds so aerodynamics is in play.
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Duncan Walker retweetledi
Loughborough University
Loughborough University@lborouniversity·
We’re thrilled to be supporting @RollsRoyce with their groundbreaking hydrogen research project which today has taken a huge step towards achieving #netzero aviation. ✈️ Read more ⤵️lboro.uk/48sT9q7
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Duncan Walker
Duncan Walker@adwalker71·
I am delighted to announce that I have been promoted to Professor of Applied Aerodynamics at Loughborough University @lborouniversity
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