What a great TdF



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This (Zeno's post below) is well written and well reasonsed. The fact of the matter is the rain
helped Ullrich's chances for two reasons. First of all, it's easier to gain time on a slower course,
not a faster one. Secondly the rain added a large chance factor by making crashes possible. The
possibility of a crash was by far LA's greatest danger of losing the race.

If you look at the five prevous TDF time trials before this year, Lance won all 5. The first TT this
year started out even and then Lance faded. There was no reason whatsoever to expect that Ulrich
would win by a large margin.

I think both riders are very evenly matched and am fans of both. It's a shame one had to lose.

> Michael wrote:
>
> >> That's faulty - The turns didn't come until the last 10k. Up till then it was straight and
> >> flat and JAN was not dominant.
> >
> >
> > Not quite so faulty. At Cap Decouverte, Ullrich and Armstrong had exactly the same time at the
> > first checkpoint, just as they did today at Nantes. In Cap Decouverte, Ullrich turned on the
> > jets and put a minute and a half on Armstrong in the latter half of the race.
> >
> > That's his modus operandi, but the weather did not permit a full out race for him.
> >
>
> I knew after the first 15K time check that Lance had it in the bag, if he didn't crash.
>
> It is not in his "modus operandi" to lose more than 10 lbs of body weight in a 50k TT like he did
> at Cap Decouverte. That was the result of a week of riding at record breaking 90 degree+(f)
> temperatures, capped by over 100 degrees in the TT, combined with inadequate hydration. That was
> clearly *the* contributing factor why Jan was able to pick up that much time over the last 35K.
> And of course, the effects of that dehydration became more and more pronounced as that TT went on.
>
> This fluid loss is conveniently ignored by Jan's sympathizers when they discuss the implications
> of that stage. The lingering effects of the loss cost LA more time to Jan in the next mountain
> stage, hut his linear recovery over the next few days was plain to see and culminated in Luz.
>
> This is not to take anything away from Jan's victory at Cap Decouverte. He won under very adverse
> conditions that were shared by all. But to take away from that particular TT victory the notion
> that "Jan is now
> 1:30 faster on a 50K TT than Lance" was IMO, fanciful wishful thinking. That Armstrong "only" lost
> about 1:30 in that TT, considering his condition, was in fact remarkable. There was no way that
> that was going to happen again after he recovered in anything like normal temperatures.
>
> That's why I knew after the first 15K time check that Lance had it in the bag. (The first 15k, I
> might add, were not all that adversely effected by the rain) There was no way Jan was going to
> pick up close to a minute over 35K on Lance in normal temperatures. It could be close but not
> decisive for either of them.
>
> Zeno
 
"Tom Kunich" <[email protected]> wrote in message
>
> On a dry course without a blazing tailwind Tyler would be on the podium tomorrow. That tailwind
> brought Vinokirov home with time to spare.
>

Huh?

TH started the day almost 4 minutes behind AV (not to be confused with Andrew Vernon). TH made up
less than half of that in the weather conditions they had. Do you think TH would have more than
doubled his time difference on AV if it was calm?

Having a tailwind doesn't affect your power output, it just means your timeframe for covering a
distance is less than in calm conditions. It would not have taken twice as long to ride the TT if it
was calm; 10 minutes longer at most. An additional 10 minutes of TT would not have been enough for
TH to catch AV.
 
On Sun, 27 Jul 2003 09:56:08 -0500, Carl Sundquist wrote:
>Having a tailwind doesn't affect your power output, it just means your timeframe for covering a
>distance is less than in calm conditions.

But, and, with high speeds you can do less with a power surplus (e.g. 48->50 vs. 54->55).
 
"Ewoud Dronkert" <[email protected]> wrote in message
news:[email protected]...
> On Sun, 27 Jul 2003 09:56:08 -0500, Carl Sundquist wrote:
> >Having a tailwind doesn't affect your power output, it just means your timeframe for covering a
> >distance is less than in calm conditions.
>
> But, and, with high speeds you can do less with a power surplus (e.g. 48->50 vs. 54->55).

I understand what you are saying ( X watts @48 kph, X+30 watts @ 50 kph vs. Y watts @ 54, Y+50 watts
@ 55 kph type of thing). But if the wind is blowing steadily at 10kph and you are riding at 58 kph
(ground speed), your airspeed is still 48 kph. The frictional differences are minimal, except for
wheels (which will have somewhat greater wind resistance).

Calling Jimbo Martin...
 
On Sun, 27 Jul 2003 10:57:40 -0500, Carl Sundquist wrote:
>if the wind is blowing steadily at 10kph and you are riding at 58 kph (ground speed), your airspeed
>is still 48 kph.

Damn.
 
"Carl Sundquist" <[email protected]> wrote in message
news:[email protected]...
>
> "Tom Kunich" <[email protected]> wrote in message
> >
> > On a dry course without a blazing tailwind Tyler would be on the podium tomorrow. That tailwind
> > brought Vinokirov home with time to spare.
> >
>
> Huh?
>
> TH started the day almost 4 minutes behind AV (not to be confused with Andrew Vernon). TH made up
> less than half of that in the weather
conditions
> they had. Do you think TH would have more than doubled his time difference on AV if it was calm?
>
> Having a tailwind doesn't affect your power output, it just means your timeframe for covering a
> distance is less than in calm conditions. It
would
> not have taken twice as long to ride the TT if it was calm; 10 minutes longer at most. An
> additional 10 minutes of TT would not have been enough for TH to catch AV.

Is Tom a prime example of the shrinking that Pup alluded to? Brain tissue as well? <g>

Dashii
 
Hi Carl:

It's an interesting question and not necessarily one with an intuitive answer. The power to overcome
rolling resistance is linearly related to gound speed, whereas the power to overcome aerodynamic
drag is related to the product of gound speed x air speed ^2. I just modeled four situations: calm
conditions and 5 m/s tailwind and power outputs of 400 and 440 watts. The model results show that in
calm conditions the increased power increases ground speed by 3.5% compared with 2.8% in a 5 m/s
tailwind. So, as Ewoud suggested, you get less with a "power surplus". Also, since you complete any
specified distance in less time with the tailwind, you gain even less of a time advantage from the
increased speed/power.

Guess the traditional tt wisdom of bust your ass in the head wind and relax a bit in the tailwind
has a sound basis.

Cheers,

Jim

"Carl Sundquist" <[email protected]> wrote in message
news:[email protected]...
>
> "Ewoud Dronkert" <[email protected]> wrote in message
> news:[email protected]...
> > On Sun, 27 Jul 2003 09:56:08 -0500, Carl Sundquist wrote:
> > >Having a tailwind doesn't affect your power output, it just means your timeframe for covering a
> > >distance is less than in calm conditions.
> >
> > But, and, with high speeds you can do less with a power surplus (e.g. 48->50 vs. 54->55).
>
> I understand what you are saying ( X watts @48 kph, X+30 watts @ 50 kph
vs.
> Y watts @ 54, Y+50 watts @ 55 kph type of thing). But if the wind is
blowing
> steadily at 10kph and you are riding at 58 kph (ground speed), your
airspeed
> is still 48 kph. The frictional differences are minimal, except for wheels (which will have
> somewhat greater wind resistance).
>
> Calling Jimbo Martin...
>
>

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"Jim Martin" <[email protected]> wrote in message
news:[email protected]...
>
> Hi Carl:
>
> It's an interesting question and not necessarily one with an intuitive answer. The power to
> overcome rolling resistance is linearly related to gound speed, whereas the power to overcome
> aerodynamic drag is related to the product of gound speed x air speed ^2. I just modeled four
situations:
> calm conditions and 5 m/s tailwind and power outputs of 400 and 440 watts. The model results show
> that in calm conditions the increased power
increases
> ground speed by 3.5% compared with 2.8% in a 5 m/s tailwind. So, as Ewoud suggested, you get less
> with a "power surplus". Also, since you complete any specified distance in less time with the
> tailwind, you gain even less
of
> a time advantage from the increased speed/power.
>
> Guess the traditional tt wisdom of bust your ass in the head wind and
relax
> a bit in the tailwind has a sound basis.
>
> Cheers,
>
> Jim
>
>
> "Carl Sundquist" <[email protected]> wrote in message
> news:[email protected]...
> >
> > "Ewoud Dronkert" <[email protected]> wrote in message
> > news:[email protected]...
> > > On Sun, 27 Jul 2003 09:56:08 -0500, Carl Sundquist wrote:
> > > >Having a tailwind doesn't affect your power output, it just means
your
> > > >timeframe for covering a distance is less than in calm conditions.
> > >
> > > But, and, with high speeds you can do less with a power surplus (e.g. 48->50 vs. 54->55).
> >
> > I understand what you are saying ( X watts @48 kph, X+30 watts @ 50 kph
> vs.
> > Y watts @ 54, Y+50 watts @ 55 kph type of thing). But if the wind is
> blowing
> > steadily at 10kph and you are riding at 58 kph (ground speed), your
> airspeed
> > is still 48 kph. The frictional differences are minimal, except for
wheels
> > (which will have somewhat greater wind resistance).

Jim,

Thanks for the clarification. Would the 0.7% difference come primarily from the wheels or can you
not isolate for it?

Point to Ewoud.
 
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