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Power Data Estimates for the climbing stages

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H

halamala

Jun 25, 2009
190
1
0
jens_attacks said:
il killer was 15 seconds faster than nibali on prati di tivo.well that didn't help... still that means without any doubt now the old di luca is back.
Click to expand...
Danilo Di Luca

Prati di Tivo

Distance: 14.55 Km
Elevation: 1026 m
Grade: 7.05 %

Time: 38:28
VAM (m/h): 1600

Using Dr. Ferrari's formula:

1600 / 270.5 = 5.91 w/kg

---

Danilo Di Luca

Tirreno-Adriatico 2012, Stage 5, Prati di Tivo

Elevation / Höhenmeter [m] : 1026 m
Distance / Streckenlänge [Km] : 14.55 Km
Time in seconds / Fahrzeit in Sekunden [sec] : 2308 = 38 min 28 sec = 38:28
Weight rider / Gewicht Fahrer [kg] : 61 kg [Wikipedia]
Weight bicycle, clothes etc. / Gewicht Fahrrad [kg] : 8 kg

Grade / mittlere Seigung : 7.0 %
Average speed / mittlere Geschwindigkeit : 22.7 Km/h
Total weight / Gesamtgewicht : 69.0 kg

Power : 383.8 Watt
Power / kg : 6.2 Watt / kg [383.8 Watt / 61 kg = 6.29 Watt / kg] :confused::eek:

Source: [ http://www.rst.mp-all.de/bergauf.htm ]
 
jens_attacks

jens_attacks

Sep 8, 2009
15,306
3
22,485
of course we can't know for sure.maybe acqua e sapone directeur was lying cassani :p .but i doubt that.the most important is that he looks in good shape and he's motivated.

i don't have much love for the approximated power outputs though.the speeds are ok to know but the power is more like a guess if you haven't his computer data and all of that
 
jens_attacks

jens_attacks

Sep 8, 2009
15,306
3
22,485
Cannavaro said:
I also tried to stop the time for the climb. They switched from the helicopter showing the main group to Egoi Martinez, when the first riders were breaking, i think for the corner at start of the climb. From this moment to the finish i stopped 39.03. So i think Nibali needed around 39.01. But i'm really unsure.
Click to expand...

on RAI they showed the start of the climb,on the other tv
stations they didn't

65241213743062509809.jpg


exact time from that point:

Prati di Tivo
2012:14,6 km@7,1%---38:56---average speed 22.50 km/h(Vincenzo Nibali)

hitch the thread isn't exactly clinicish,i think it can be moved from here
 
C

Cannavaro

Nov 17, 2011
105
120
9,030
jens_attacks said:
on RAI they showed the start of the climb,on the other tv
stations they didn't

65241213743062509809.jpg


exact time from that point:

Prati di Tivo
2012:14,6 km@7,1%---38:56---average speed 22.50 km/h(Vincenzo Nibali)

hitch the thread isn't exactly clinicish,i think it can be moved from here
Click to expand...
Thank you!
 
L

Le breton

Nov 10, 2009
1,598
38
10,530
jens_attacks said:
..........
i don't have much love for the approximated power outputs though.the speeds are ok to know but the power is more like a guess if you haven't his computer data and all of that
Click to expand...

i don't have much love for the approximated power outputs though
On some climbs, like the Col d'Eze TT which is won at 30 km/h and where the aerodynamic component of the power is quite sizeable the results of calculations for different riders, even in watts/kg, have quite large uncertainties (even without mentioning the poorly known altitude gain)

However, when the aerodynamic component represent only a small fraction of the total power output, the calculations can be as good as SRM or Powertap measurements.

In the best cases the error on altitude difference (top minus bottom alt.) and time are totally negligible.

In a case where gravity and rolling resistance account for 90% of the power output (best racers on a 10-11% slope) the wind would have to be fairly strong to end up with a 3% overall uncertainty, in particular for a lone racer, as it would mean a 30% error on the aero component.
 
Havetts

Havetts

Jan 27, 2011
3,399
0
0
halamala said:
According to RAI: Nibali a Prati di Tivo è salito a 1589 di VAM, 22,529 km/h.

Prati di Tivo

Distance: 14.55 Km
Elevation: 1026 m
Grade: 7.05 %

VAM (m/h): 1589
Time: 38:44

Using Dr. Ferrari's formula:

1589 / 270.5 = 5.87 w/kg

---

Vincenzo Nibali

Tirreno-Adriatico 2012, Stage 5, Prati di Tivo

Elevation / Höhenmeter [m] : 1026 m
Distance / Streckenlänge [Km] : 14.55 Km
Time in seconds / Fahrzeit in Sekunden [sec] : 2324 = 38 min 44 sec = 38:44
Weight rider / Gewicht Fahrer [kg] : 64 kg [Wikipedia]
Weight bicycle, clothes etc. / Gewicht Fahrrad [kg] : 8 kg

Grade / mittlere Seigung : 7.0 %
Average speed / mittlere Geschwindigkeit : 22.5 Km/h
Total weight / Gesamtgewicht : 72.0 kg

Power : 394.2 Watt
Power / kg : 6.1 Watt / kg

Source: [ http://www.rst.mp-all.de/bergauf.htm ]
Click to expand...

For you Parrulo :).
 
S

simo1733

Jun 15, 2010
1,318
0
0
Le breton said:
i don't have much love for the approximated power outputs though
On some climbs, like the Col d'Eze TT which is won at 30 km/h and where the aerodynamic component of the power is quite sizeable the results of calculations for different riders, even in watts/kg, have quite large uncertainties (even without mentioning the poorly known altitude gain)

However, when the aerodynamic component represent only a small fraction of the total power output, the calculations can be as good as SRM or Powertap measurements.

In the best cases the error on altitude difference (top minus bottom alt.) and time are totally negligible.

In a case where gravity and rolling resistance account for 90% of the power

output (best racers on a 10-11% slope) the wind would have to be fairly strong
to end up with a 3% overall uncertainty, in particular for a lone racer, as it would
mean a 30% error on the aero component.
Click to expand...
How can they account for changes in pace?A steady pace being much more efficient than repeated accelerations.
 
iZnoGouD

iZnoGouD

BANNED
Feb 18, 2011
1,325
0
0
vetooo ‏@ammattipyoraily

@Vaughters Well done! Cervinia, from 10 km to 2 km banner [=8.0 km]. Ryder Hesjedal | 21:29, 22.34 kph, VAM 1510 m/h, 5.65 W/kg. #giro
 
DirtyWorks

DirtyWorks

Feb 10, 2010
10,645
20
22,510
Clinic Related

You guys generating all the numbers are impressive. I don't have the patience.

I watched today's Giro Deathmarch (Saturday, 19 May) and was wondering of the Giro racing so far, what is are the general opinions on how much PED's are affecting times overall? Pantani go-go 90's? Maybe it's too early to tell yet?

IMHO, there's difficulty in answering my question because of team radios. If I had someone dictating pace over a radio all day, I'd race like they did today too.
 
N

Nilsson

Jan 10, 2012
451
0
0
DirtyWorks said:
You guys generating all the numbers are impressive. I don't have the patience.

I watched today's Giro Deathmarch (Saturday, 19 May) and was wondering of the Giro racing so far, what is are the general opinions on how much PED's are affecting times overall? Pantani go-go 90's? Maybe it's too early to tell yet?

IMHO, there's difficulty in answering my question because of team radios. If I had someone dictating pace over a radio all day, I'd race like they did today too.
Click to expand...

There is definitely a difference, the nineties-extremes are behind us...

I don't know if you have seen this list?


halamala said:
Cote de la Croix Neuve (Montee Laurent Jalabert) [Distance 3.1 Km, Grade: 10.1 %, Elevation: 312 m]

Tour de France 1995

Marco Pantani, 8:40
Miguel Indurain, 8:40
Bjarne Riis, 8:40

Tour de France 2005

Lance Armstrong, 9:33
Ivan Basso, 9:33
Jan Ullrich, 9:33
Cadel Evans, 9:33

Tour de France 2010

Joaquim Rodriguez, 9:33
Alberto Contador, 9:33
Andy Schleck, 9:45
Jurgen Van Den Broeck, 9:45
Samuel Sanchez, 9:45
Denis Menchov, 9:45

Paris-Nice 2007

Alberto Contador, 9:40
Davide Rebellin, 9:42
David Lopez, 9:52
Cadel Evans, 9:53
Tadej Valjavec, 9:57

Paris-Nice 2010

Alberto Contador, 9:44
Alejandro Valverde, 9:54
Samuel Sanchez, 9:54

Paris-Nice 2012

Lieuwe Westra, 9:52
Alejandro Valverde, 9:58
Bradley Wiggins, 9:58
Levi Leipheimer, 9:58
Simon Spilak, 9:58
Click to expand...
 
N

Nilsson

Jan 10, 2012
451
0
0
Havetts said:
Wondering myself as well.

Thanks in advance :)
Click to expand...

Pretty decent numbers. Deignan averaged 4.9 W/kg for 1 hour and 40 minutes, and did 5.1 W/kg in the last 8 km (is 28 minutes). Gesink rode that last part 3.15 min. faster and therefore should be around 5.8/5.9 W/kg...
 
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