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Power Data Estimates for the climbing stages

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Re: Re:

04 Aug 2016 22:55

Le breton wrote:
Valv.Piti wrote:What the w/kg for 3,6 km on 7,6% on 14,30 minutes?


For a 70 kg cyclist standard Vayer cyclist, under "normal" conditions, about 3,8 W/kg.


I actually weigh in at exactly 70 kg...

Thanks. Lots of space for progression I guess.
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Re: Re:

05 Aug 2016 06:35

Valv.Piti wrote:
Le breton wrote:
Valv.Piti wrote:What the w/kg for 3,6 km on 7,6% on 14,30 minutes?


For a 70 kg cyclist standard Vayer cyclist, under "normal" conditions, about 3,8 W/kg.


I actually weigh in at exactly 70 kg...

Thanks. Lots of space for progression I guess.

I make it a little higher, closer to 3.9 - 4.0W/kg, but depends on assumptions made.
These are mine:
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User avatar Alex Simmons/RST
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05 Aug 2016 16:00

Thanks, Alex, really helpful there. :)

Some asthma medicine and a bit more training, then Im good. :D
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Re:

05 Aug 2016 20:39

Valv.Piti wrote:Thanks, Alex, really helpful there. :)

Some asthma medicine and a bit more training, then Im good. :D

I didn't include the transmission losses, for which I usually add 2.5%.
So that my 3.8 become 3.9 W/kg :D
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Re: Re:

05 Aug 2016 22:05

Le breton wrote:
Valv.Piti wrote:Thanks, Alex, really helpful there. :)

Some asthma medicine and a bit more training, then Im good. :D

I didn't include the transmission losses, for which I usually add 2.5%.
So that my 3.8 become 3.9 W/kg :D

:)

3.9W/kg is pretty nice, can have fun day out with that sort of power.
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07 Aug 2016 13:53

Yesterday I did a 6.2km climb with 413m of altitude gain, 6.6% average gradient, in exactly 20min. That would be around 4.65 W/kg, right?
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Re:

07 Aug 2016 23:33

Mayomaniac wrote:Yesterday I did a 6.2km climb with 413m of altitude gain, 6.6% average gradient, in exactly 20min. That would be around 4.65 W/kg, right?

That gradient doesn't quite add up to the distance ridden and vertical ascent, but assuming it was 6200m ridden and 417m climbed (which is 6.74%), then I get ~4.6W/kg.
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27 Aug 2016 16:40

ammattipyöräily ‏@ammattipyoraily 32 min.32 minuten geleden
#LV2016, Stage 8. La Camperona (last 2.55 km, 15.14 %, 386 m)

According to provisional timing, Quintana approx. as fast as Froome in 2014.
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29 Aug 2016 16:38

Any numbers on today? It would be great to see.
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29 Aug 2016 17:36

Don't expect a great power estimation

https://twitter.com/ammattipyoraily?lang=nl
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29 Aug 2016 18:06

2005 level speed (would have been 5th fastest that day, just 1 second behind Menchov and Heras): http://www.climbing-records.com/2016/08/quintana-unleashed-on-covadonga.html
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Re:

29 Aug 2016 19:34

Netserk wrote:2005 level speed (would have been 5th fastest that day, just 1 second behind Menchov and Heras): http://www.climbing-records.com/2016/08/quintana-unleashed-on-covadonga.html

Ridiculously fast. Pardilla and Formolo faster than the 2012 trio.
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Re:

29 Aug 2016 20:41

Netserk wrote:2005 level speed (would have been 5th fastest that day, just 1 second behind Menchov and Heras): http://www.climbing-records.com/2016/08/quintana-unleashed-on-covadonga.html


Truly astonishing especially if you look at the three amigos' times from earlier period plus Froome going 1'16" faster than in 2012/2014. Quintana is at Heras level.
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29 Aug 2016 20:45

Slower than mythical climber Menchov :p
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Re: Power Data Estimates for the climbing stages

31 Aug 2016 09:28

All the climbing times of one year's edition have a common component (circumstances that day, what the race was up to that point, etc). That really needs to be controlled for when comparing the best climbing time across years. Putting 2005 Heras into a time machine and dropping him in this Vuelta might have resulted in a much quicker time.
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Re: Power Data Estimates for the climbing stages

31 Aug 2016 12:17

SeriousSam wrote:All the climbing times of one year's edition have a common component (circumstances that day, what the race was up to that point, etc). That really needs to be controlled for when comparing the best climbing time across years. Putting 2005 Heras into a time machine and dropping him in this Vuelta might have resulted in a much quicker time.

Or much slower time.
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04 Sep 2016 12:25

Any figures kicking about for yesterday? I reckon Yates on the last two climbs and Chavez on the last climb might prove informative. I only saw highlights which makes it hard to gauge the level of effort but I don't think there can be any doubt that both men were giving a full sustained effort from their attacks and it didn't look like wind was much of a factor. Little point with Cont, Froome or Nairo as they were all dicking about or injured.
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07 Sep 2016 23:55

I could be wrong here, but I had Chaves, Froome, Contador and Quintana at 9:27 for the final 3km. Anyone want to take a guess for the w/kg?
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Re:

08 Sep 2016 13:44

Durden93 wrote:I could be wrong here, but I had Chaves, Froome, Contador and Quintana at 9:27 for the final 3km. Anyone want to take a guess for the w/kg?


I wouldn't mind giving a value for the whole climb, but there is a slight discrepancy between two sources, this one
http://www.altimetrias.net/aspbk/verPuerto.asp?id=379
and climbing-records
http://www.climbing-records.com/.
4km and 496 m for the first
3.9 km and 488 m for the second.

Taking the second set of data and not trying to be very accurate, I find that to go up that climb in 15:26 (from climbing-records) you need, if you weigh 67 kg, 424 watts, i.e 6.33 W/kg.

I have taken a CdA of 0.35 m^2, an air density of 1 kg/m^3 and 0.0045 for the road friction just to get an idea.

PS : PS : the av. altitude was only about 750m, so maybe increase air density to 1.07, if you push CdA to 0.375 and rolling friction to 0.005, you end up at ~ 6.4 W/kg.IF THE CLIMB IS + 496 m (vs 488), you get 6.5 W/kg.
Of course with no wind, no drafting behind other cyclists or cars :)
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Re: Re:

08 Sep 2016 16:42

Le breton wrote:
Durden93 wrote:I could be wrong here, but I had Chaves, Froome, Contador and Quintana at 9:27 for the final 3km. Anyone want to take a guess for the w/kg?


I wouldn't mind giving a value for the whole climb, but there is a slight discrepancy between two sources, this one
http://www.altimetrias.net/aspbk/verPuerto.asp?id=379
and climbing-records
http://www.climbing-records.com/.
4km and 496 m for the first
3.9 km and 488 m for the second.

Taking the second set of data and not trying to be very accurate, I find that to go up that climb in 15:26 (from climbing-records) you need, if you weigh 67 kg, 424 watts, i.e 6.33 W/kg.

I have taken a CdA of 0.35 m^2, an air density of 1 kg/m^3 and 0.0045 for the road friction just to get an idea.

PS : PS : the av. altitude was only about 750m, so maybe increase air density to 1.07, if you push CdA to 0.375 and rolling friction to 0.005, you end up at ~ 6.4 W/kg.IF THE CLIMB IS + 496 m (vs 488), you get 6.5 W/kg.
Of course with no wind, no drafting behind other cyclists or cars :)


Yeah, I was well off on the time. That doesn't seem unreasonable to me, for a 15 minute effort.
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