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Jul
16
comment Why is it easier to follow a cyclist up-hill
@DavidJames In that case, Swain has probably miscopied the equation from di Prampero. You can see the correct power equation in Wilson and Papadopoulos' Bicycling Science, or Martin et al Validation of a mathematical model for road cycling power
Jul
16
revised Why is it easier to follow a cyclist up-hill
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Jul
16
comment Why is it easier to follow a cyclist up-hill
Stage 10 of this year's Tour from Macon to Belgarde sur Valserine went over the 17km long 7.1% Col du Grand Colombier. Chris Anker Sorensen, a climber for Saxo Bank, went up this HC climb at 330 watts and 20.9 km/h.
Jul
16
comment Why is it easier to follow a cyclist up-hill
I think you're missing a g in the first term and a rho/2 in the second.
Jul
16
awarded  Nice Answer
Jul
16
comment In road racing, what are “rolling attacks”?
I think he meant "rolling attacks", not "rolling attack." If so, rolling attacks are a series of attacks and counterattacks. This is common at the beginning of a race when breakaways are trying to form, and near the end of races when riders are trying to winnow the final selection. There are also a series of "set pieces" such as when you have a team mate attack then expect the other teams to cover the attack.
Jul
16
revised Why is it easier to follow a cyclist up-hill
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Jul
16
revised Why is it easier to follow a cyclist up-hill
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Jul
16
revised What is guttering the peloton
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Jul
16
answered What is guttering the peloton
Jul
16
comment Why is it easier to follow a cyclist up-hill
The IHPVA rules say that the maximum slope over the run-up cannot exceed 2/3rd of one percent (see section 3.3.1 here). I believe Sam weighed closer to 70kg, and he has posted an SRM data file which shows his power during one of the record attempts. You can see his speed and power here.
Jul
16
revised Why is it easier to follow a cyclist up-hill
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Jul
16
comment Why is it easier to follow a cyclist up-hill
Ah, you're right: I downplayed the psychological aspect but I'll amend my answer. +1 to you.
Jul
16
comment Why is it easier to follow a cyclist up-hill
The maximum slope on the test section at Battle Mountain is -.0067 (i.e., 2/3rds of 1 percent). When the Varna Diablo set the record at slightly above 37 m/s, Sam Whittingham was putting out slightly above 500 watts. The "benefit" from the slope would have been s*v*m*g where s= -0.0067, v=37, m=90, and g=9.8, or about 200 watts (i.e., if the course had been dead flat an additional 200 watts would have been needed).
Jul
15
revised Why is it easier to follow a cyclist up-hill
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Jul
15
answered Why is it easier to follow a cyclist up-hill
Jul
12
awarded  Necromancer
Jul
12
revised How are the categories for climbs decided?
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Jun
29
comment How many miles of riding require the same effort as one mile of running?
@heltonbiker: The data were downloaded from the Ironman site. The plots were done with R, using the basic graphics function "pairs" which creates the scatterplot matrix. A slightly custom function was used to draw the smooth red line in the upper plots.
Jun
29
comment What is preferred lacing for PowerTap wheel build?
+1 for the reference to the PT FAQ. The number of crossings will also depend on the depth of the rim: you may not be able to get a 3x on a deep rim (though you shouldn't need to -- a relatively shallow training rim and a wheel cover will work fine for almost all triathlons). To get consistent readings from the PT's torque tube you should not use radial lacing on the left side.