Power Data Estimates for the climbing stages

[Alex Simmons/RST]

Quotes an error? I think you're in the wrong forum, mate.

The high falutin' toff pub is further down the road. We're mostly rough necks here.

Perhaps you're right, although toff pubs aren't my personal preference.

 

[acoggan]

Alternatively you can look at SRM observations compared to crude calcuations and even then I'm yet to see a disparity at the margins

You haven't been paying very close attention, then:

 

[Ferminal]

You haven't been paying very close attention, then:

Yes, which ones are out 0.5 W kg / 10% as Alex' numbers show can occur at a very light breeze?

 

[acoggan]

Regarding precision:

vetooo ‏@ammattipyoraily 23 Aug

#TDF 2012, St. 11. @janibrajkovic [60 kg] - SRM vs. CPL Madeleine: 1:07:39 | -0.88% Croix de Fer: 1:04:31 | -0.82% Toussuire: 45:59 | +0.68%

Anybody know why vetoo persists in calling it the CPL model when it isn't?

 

[acoggan]

Yes, which ones are out 0.5 W kg / 10% as Alex' numbers show can occur at a very light breeze?

At least one pair differs by ~10%.

EDIT: Actually, I see two.

 

[Ferminal]

I guess the others were all on dead calm days.

 

[BigBoat]

I just saw Geneviève Jeanson's record time on Mt. Washington hillclimb was faster than Tim Johnson and Justin England's race winning times 2001, 2004. Not to mention about 80% of the winning men's times since the race started. Of course conditions vary quite a bit up there with the world record windspeeds. To me it tells how accurate climbing speeds are to measuring power (20-200 mph winds not staggering winning times by much over 5 mins) and at the same time how inaccurate a potential prediction can also be in extremes.

 

[Fortyninefourteen]

I just saw Geneviève Jeanson's record time on Mt. Washington hillclimb was faster than Tim Johnson and Justin England's race winning times 2001, 2004. Not to mention about 80% of the winning men's times since the race started. Of course conditions vary quite a bit up there with the world record windspeeds. To me it tells how accurate climbing speeds are to measuring power (20-200 mph winds not staggering winning times by much over 5 mins) and at the same time how inaccurate a potential prediction can also be in extremes.

Hematocrit 56% at Worlds in Hamilton 2003. Mike drop.

 

[my username is flish]

Roche's stage 2 Vuelta win, SRM data for stage: of any interest, given the recent change of team and sucess it appears to be bringing?

http://www.srm.de/news/road-cycling/vuelta-a-espana-stage-2/

 

[Le breton]

I just saw Geneviève Jeanson's record time on Mt. Washington hillclimb was faster than Tim Johnson and Justin England's race winning times 2001, 2004. Not to mention about 80% of the winning men's times since the race started. Of course conditions vary quite a bit up there with the world record windspeeds. To me it tells how accurate climbing speeds are to measuring power (20-200 mph winds not staggering winning times by much over 5 mins) and at the same time how inaccurate a potential prediction can also be in extremes.

Don't forget that at a windspeed of 200 mph you can't cycle anymore as you are ... airborne.

A 90 kg friend told me of an experience in Patagonia where he climbed a mountain pass without having to pedal at all

 

[murali]

is there any data for today's climb in vuelta to use as benchmark?

 

[Ferminal]

For Ezaro you mean? Check jens' blog.

http://climbing-records.blogspot.ro/2012/08/purito-dominates-on-his-territory.html

and the gaps http://cqranking.com/men/asp/gen/race.asp?raceid=22128

6:46 for Purito

So if they do a 9-10 then most sprinters should survive or at least get back on before the finish. A 7-8 would cause a pretty good selection.

 

[murali]

what will be considered an alien performance for that climb?

 

[Ferminal]

6:46

Don't worry, it's not going to happen.

(Plus it's a bit hard to measure alienness against one set of timing from 2012).

 

[Netserk]

There will be headwind on the climb today, and together with the place on the route, no one should ride it anywhere near the time from last year.

 

[Ferminal]

Missed the start but it was somewhere 8-9.

 

[jens_attacks]

it was around 8 minutes this time..what about purito last year, 500 watts no?

 

[Tyler'sTwin]

#LaVuelta, Stage 8. Peñas Blancas (last 8.85 km, 7.20 %, 637 m). Janez Brajkovic [60 kg]: 24:19. SRM: 359.00 W. CPL: 359.01 W (+0.0028%).

359/60=5.98

Vuelta stage 8: Jerez de la Frontera - Alto Peñas Blancas (Estepona) 166.6km
‏
30. Janez Brajkovic (Slo) Astana Pro Team 0:01:39

 

[Tyler'sTwin]

2013 Vuelta stage 8 Performance Analysis
http://veloclinic.tumblr.com/post/59894859935/2013-vuelta-stage-8-performance-analysis

 

[DanielsDad]

I just saw Geneviève Jeanson's record time on Mt. Washington hillclimb was faster than Tim Johnson and Justin England's race winning times 2001, 2004. ...

TT - it counts against other TTs, otherwise, you just have to beat the other guy(gal) and comparing a TT to a RR, if you were doing that, is not a good comparison.

 

[roundabout]

This is ridiculous.

Ok, Roche had to close some small gaps, but he never hit the wind until he came past Basso in the sprint. And yet the doc uses the "no draft" condition? How about watching the actual race?

Brajkovic was dropped prior to 5km to go so it's impossible to tell how much drafting he actually did.

The closest to the no draft condition are Anton with 11 min 45 seconds from his attack until crossing the line and König with 4 min 20.

 

[whatsperkilo]

2013 Vuelta stage 8 Performance Analysis
http://veloclinic.tumblr.com/post/59894859935/2013-vuelta-stage-8-performance-analysis

From the above we get:

Stage 8: Puerto de Peñas Blancas (last 8.85 km, 7.20 %, 637 m)

Leopold König ---- CZE / NetAPP-Endura | 22:40, 23.43 Kph, VAM 1686 m/h, 6.20 W/kg
Daniel Moreno ---- ESP / Katusha ----- | 22:41, 23.41 Kph, VAM 1685 m/h, 6.20 W/kg
Nicolas Roche ---- IRL / Saxo-Tinkoff- | 22:45, 23.34 Kph, VAM 1680 m/h, 6.18 W/kg
Thibaut Pinot ---- FRA / FDJ --------- | 22:45, 23.34 Kph, VAM 1680 m/h, 6.18 W/kg
Ivan Basso ------- ITA / Cannondale -- | 22:45, 23.34 Kph, VAM 1680 m/h, 6.18 W/kg
etc............

Q. Why is the w/kg declining in a nice linear fashion ?
This data would imply they're all the same weight ! ie. are Roche/Pinot/Basso all the same weight etc ? If cyclists have differing weights, then we shouldn't see a nice linear w/kg column, it should be all over the place(ish) !

 

[Le breton]

From the above we get:

Stage 8: Puerto de Peñas Blancas (last 8.85 km, 7.20 %, 637 m)

Leopold König ---- CZE / NetAPP-Endura | 22:40, 23.43 Kph, VAM 1686 m/h, 6.20 W/kg
Daniel Moreno ---- ESP / Katusha ----- | 22:41, 23.41 Kph, VAM 1685 m/h, 6.20 W/kg
Nicolas Roche ---- IRL / Saxo-Tinkoff- | 22:45, 23.34 Kph, VAM 1680 m/h, 6.18 W/kg
Thibaut Pinot ---- FRA / FDJ --------- | 22:45, 23.34 Kph, VAM 1680 m/h, 6.18 W/kg
Ivan Basso ------- ITA / Cannondale -- | 22:45, 23.34 Kph, VAM 1680 m/h, 6.18 W/kg
etc............

Q. Why is the w/kg declining in a nice linear fashion ?
This data would imply they're all the same weight ! ie. are Roche/Pinot/Basso all the same weight etc ? If cyclists have differing weights, then we shouldn't see a nice linear w/kg column, it should be all over the place(ish) !

Sorry whatsperkilo, your message makes no sense.
You pick 5 racers who perform at the same level, at the 0.3% level.

Of course their Watts/kg are going to be about the same at 0.3% level, no matter what their actual weight might be.

That's the whole point of measuring performance in units of power/mass.

I don't want to complicate the issue bringing in the rider/(rider +bike mass) small influence.

 

[maltiv]

Q. Why is the w/kg declining in a nice linear fashion ?
This data would imply they're all the same weight ! ie. are Roche/Pinot/Basso all the same weight etc ? If cyclists have differing weights, then we shouldn't see a nice linear w/kg column, it should be all over the place(ish) !

Because it's w/kg, not absolute watt. W/kg obviously shouldn't be all over the place (that's why it's used, it's easily comparable), small variations could only be caused by differences in drafting etc.

 

[Ferminal]

Also with the calculations doc uses it will be normalised to a certain rider weight.