Tienus

I rode my e-bike as fast as humanly possible -sometimes faster!

[Elon Musk @elonmusk]

SpaceX Dragon docks with Space Station

[Tienus @TPV01]

@oufeh Also extremely aero in the climbing position

[Tienus @TPV01]

@wattsnow @jackhambleton2 @oufeh @ammattipyoraily I'm pretty sure both these claims are true but am happy to be proven wrong. If true, the power reuired for his performance is more then what we think is humanly possible. Does that not trigger your curiosity as a scientist involved in anti doping?

[Tienus @TPV01]

@wattsnow @jackhambleton2 @oufeh @ammattipyoraily 1. His frontal area is bigger then 0.4 m2
2. His drag coefficient is bigger then 0.6
Unless 1 of those 2 claims is false his cda is not anywhere close to 0.2. Which of the 2 is wrong in your opinion?

[Tienus @TPV01]

@wattsnow @jackhambleton2 @oufeh @ammattipyoraily I will not take power data provided by the rider/coach to calculate cda. I can point you to some bad cycling studys who have just done that. Garbage in is garbage out in my opinion.

[Tienus @TPV01]

@wattsnow @jackhambleton2 @oufeh @ammattipyoraily You are misrepresenting that study by quoting the number for body only. TAP is pretty aggresive in that study as you can see. In TT bars it will be slightly lower because of the arms.

[Tienus @TPV01]

@wattsnow @oufeh @ammattipyoraily Sure, but I do not believe air reflected will reduce the coefficient of drag below the number for static position.

[Tienus @TPV01]

@wattsnow @oufeh @ammattipyoraily I do agree that VEM is better then a tunnel for the reasons you mention. I would expect slightly higher cda results. Still a frontal area measurement can be used in conjunction to check if things ad up. There are ways to cheat in cycling that reduce cda in VEM.

[Tienus @TPV01]

@wattsnow @oufeh @ammattipyoraily You could theoretically measure and calculate a band of cda for the full 360 degree spinning of the cranks. A Cd of .7 multiplied by the FA will give you a pretty good estimate of the dynamic cda.

[Tienus @TPV01]

@wattsnow @oufeh @ammattipyoraily I agree. Helmets are the only piece of euipment allowed by UCI to use as fairing. The helmet has to be a good fit with regards to neck and shoulders otherwise it will likely increase cda. Seeing a team with the same helmets will never be ideal.

[Tienus @TPV01]

@wattsnow @oufeh @ammattipyoraily Its hard to notice anything as you are posting an incomplete sheat of data. I see no mentioning of different bars and helmet.

[Tienus @TPV01]

@wattsnow @oufeh @ammattipyoraily Disappointed only because its lacking information. Frontal area would be nice to start with. Did you measure that?

[Tienus @TPV01]

@wattsnow @oufeh @ammattipyoraily I agree that it should be taken with care. The major factor is frontal area. A pursuit rider in compact position can not hide the legs. The legs account for about half of the aerodynamic drag from the riders body. Do you agree with my statements?

[Tienus @TPV01]

@wattsnow @oufeh @ammattipyoraily I am familiar with the work of Underwood. This picture is from riding against the wind.

[Tienus @TPV01]

@wattsnow @oufeh @ammattipyoraily If not I'm happy to discuss the numbers you have provided. We disagree and in my opinion that is the best reason to discuss this issue.

[Tienus @TPV01]

@wattsnow @oufeh @ammattipyoraily From the info you have provided so far I guess this rider is 178cm, the smallest on the team. We where discussing "bigger" riders. Can you provide the data of the 190cm rider?

[Tienus @TPV01]

@inrng @Amit_Navon Sure, the tour could do with another scandal as its been a while. The UCI is probably as keen in finding motors as in the 2015 edition when the police showed up.

[Tienus @TPV01]

@wattsnow @oufeh @ammattipyoraily very sure ;-)
https://t.co/D5MGjrWyu7

[Tienus @TPV01]

@koenpelgrim1 @ammattipyoraily No guess at all? A ballpark figure for a rider his size would suffice

[Tienus @TPV01]

@koenpelgrim1 @ammattipyoraily Very interesting. Can you also estimate his cda?