Zipp 404 Watts saved

Quoted message said:

Hi All,

A few years ago some of you guys were kind enough to supply some info
on how to mathematically estimate the power savings possible with Zipp
404 wheels over normal wheels based on their published resistance
numbers.

I cannot locate this thread, as it seems to have been expunged.

Anyone feel like showing the math again?

Thanks!

Joseph

As the curmudgeon, gotta remind you that these 'pure' numbers come from
a wind tunnel. Other tough to predict and control factors like the
weather and rider's performance, is at least as important. But tough to
use to sell wheels.

Qui si parla Campagnolo said:

Quoted message said:

Hi All,

A few years ago some of you guys were kind enough to supply some info
on how to mathematically estimate the power savings possible with Zipp
404 wheels over normal wheels based on their published resistance
numbers.

I cannot locate this thread, as it seems to have been expunged.

Anyone feel like showing the math again?

Thanks!

Joseph

As the curmudgeon, gotta remind you that these 'pure' numbers come from
a wind tunnel. Other tough to predict and control factors like the
weather and rider's performance, is at least as important. But tough to
use to sell wheels.

I know. My Deep V's are good enough for me. I'm of the opinion that for
my purposes, even if it would help, it doen't matter because there are
as you say so many other variables that have a greater effect that any
benefit would probably be lost in the noise.

But this is for a buddy who really wants some, can afford them, but
needs some sort of technical info to convince himself that he isn't
just indulging a whim. (Even if he is!) I told him I once calculated
that 40kmh with 404's was equalt to 37kmh with standard 32 rims. He
wants to see the math, but I only plugged in values to equations some
of the math guys here supplied.

Joseph

Quoted message said:

Qui si parla Campagnolo said:

Quoted message said:

Hi All,

A few years ago some of you guys were kind enough to supply some info
on how to mathematically estimate the power savings possible with Zipp
404 wheels over normal wheels based on their published resistance
numbers.

I cannot locate this thread, as it seems to have been expunged.

Anyone feel like showing the math again?

Thanks!

Joseph

As the curmudgeon, gotta remind you that these 'pure' numbers come from
a wind tunnel. Other tough to predict and control factors like the
weather and rider's performance, is at least as important. But tough to
use to sell wheels.

I know. My Deep V's are good enough for me. I'm of the opinion that for
my purposes, even if it would help, it doen't matter because there are
as you say so many other variables that have a greater effect that any
benefit would probably be lost in the noise.

But this is for a buddy who really wants some, can afford them, but
needs some sort of technical info to convince himself that he isn't
just indulging a whim. (Even if he is!) I told him I once calculated
that 40kmh with 404's was equalt to 37kmh with standard 32 rims. He
wants to see the math, but I only plugged in values to equations some
of the math guys here supplied.

Joseph

Ghost of P T Barnum

Quoted message said:

Hi All,

A few years ago some of you guys were kind enough to supply some info
on how to mathematically estimate the power savings possible with Zipp
404 wheels over normal wheels based on their published resistance
numbers.

I cannot locate this thread, as it seems to have been expunged.

Anyone feel like showing the math again?

Thanks!

Joseph

Dear Joseph,

http://groups.google.com/group/rec.bicycles.tech/browse_frm/thread/32856bab0c850d6e/0cc54a90ba52e386?lnk=gst&q=404+zipp+drag+37&rnum=1#0cc54a90ba52e386

Cheers,

Carl Fogel

Quoted message said:

Quoted message said:

Hi All,

A few years ago some of you guys were kind enough to supply some info
on how to mathematically estimate the power savings possible with Zipp
404 wheels over normal wheels based on their published resistance
numbers.

I cannot locate this thread, as it seems to have been expunged.

Anyone feel like showing the math again?

Thanks!

Joseph

Dear Joseph,

http://groups.google.com/group/rec.bicycles.tech/browse_frm/thread/32856bab0c850d6e/0cc54a90ba52e386?lnk=gst&q=404+zipp+drag+37&rnum=1#0cc54a90ba52e386

Cheers,

Carl Fogel

What would I do without you guys? Why couldn't I find that thread?

Thanks!

Joseph

Quoted message said:

Quoted message said:

Quoted message said:

Hi All,

A few years ago some of you guys were kind enough to supply some info
on how to mathematically estimate the power savings possible with Zipp
404 wheels over normal wheels based on their published resistance
numbers.

I cannot locate this thread, as it seems to have been expunged.

Anyone feel like showing the math again?

Thanks!

Joseph

Dear Joseph,

http://groups.google.com/group/rec.bicycles.tech/browse_frm/thread/32856bab0c850d6e/0cc54a90ba52e386?lnk=gst&q=404+zipp+drag+37&rnum=1#0cc54a90ba52e386

Cheers,

Carl Fogel

What would I do without you guys? Why couldn't I find that thread?

Thanks!

Joseph

Dear Joseph,

I just searched the Google Group RBT archive for zipp, 404, drag, and
37 (the 37 kmh speed that you mentioned later in the thread that you
had calculated):

http://groups.google.com/group/rec.bicycles.tech/search?group=rec.bicycles.tech&q=zipp+404+drag+37&qt_g=1

You could also limit a search for zipp + 404 + drag to your own posts
with the advanced search:

http:[email hidden]&safe=off&qt_s=Search

Cheers,

Carl Fogel

Quoted message said:

Quoted message said:

Quoted message said:

On 23 Jan 2007 03:38:22 -0800, [email hidden] wrote:

>Hi All,
>
>A few years ago some of you guys were kind enough to supply some info
>on how to mathematically estimate the power savings possible with Zipp
>404 wheels over normal wheels based on their published resistance
>numbers.
>
>I cannot locate this thread, as it seems to have been expunged.
>
>Anyone feel like showing the math again?
>
>Thanks!
>
>Joseph

Dear Joseph,

http://groups.google.com/group/rec.bicycles.tech/browse_frm/thread/32856bab0c850d6e/0cc54a90ba52e386?lnk=gst&q=404+zipp+drag+37&rnum=1#0cc54a90ba52e386

Cheers,

Carl Fogel

What would I do without you guys? Why couldn't I find that thread?

Thanks!

Joseph

Dear Joseph,

I just searched the Google Group RBT archive for zipp, 404, drag, and
37 (the 37 kmh speed that you mentioned later in the thread that you
had calculated):

http://groups.google.com/group/rec.bicycles.tech/search?group=rec.bicycles.tech&q=zipp+404+drag+37&qt_g=1

You could also limit a search for zipp + 404 + drag to your own posts
with the advanced search:

http:[email hidden]&safe=off&qt_s=Search

Cheers,

Carl Fogel

I tried "joseph 404 watts" and similar but couldn't find it. Loose nut
behind the wheel I suppose.

Joseph

Quoted message said:

Quoted message said:

Quoted message said:

[email hidden] wrote:
> On 23 Jan 2007 03:38:22 -0800, [email hidden] wrote:
>
> >Hi All,
> >
> >A few years ago some of you guys were kind enough to supply some info
> >on how to mathematically estimate the power savings possible with Zipp
> >404 wheels over normal wheels based on their published resistance
> >numbers.
> >
> >I cannot locate this thread, as it seems to have been expunged.
> >
> >Anyone feel like showing the math again?
> >
> >Thanks!
> >
> >Joseph
>
> Dear Joseph,
>
> http://groups.google.com/group/rec.bicycles.tech/browse_frm/thread/32856bab0c850d6e/0cc54a90ba52e386?lnk=gst&q=404+zipp+drag+37&rnum=1#0cc54a90ba52e386
>
> Cheers,
>
> Carl Fogel

What would I do without you guys? Why couldn't I find that thread?

Thanks!

Joseph

Dear Joseph,

I just searched the Google Group RBT archive for zipp, 404, drag, and
37 (the 37 kmh speed that you mentioned later in the thread that you
had calculated):

http://groups.google.com/group/rec.bicycles.tech/search?group=rec.bicycles.tech&q=zipp+404+drag+37&qt_g=1

You could also limit a search for zipp + 404 + drag to your own posts
with the advanced search:

http:[email hidden]&safe=off&qt_s=Search

Cheers,

Carl Fogel

I tried "joseph 404 watts" and similar but couldn't find it. Loose nut
behind the wheel I suppose.

Joseph

Dear Joseph,

I pussect a tpyo, since that will find the post right away:

http://groups.google.com/group/rec.bicycles.tech/search?group=rec.bicycles.tech&q=joseph+watts+404&qt_g=1

Cheesr,

Carl Fogle

Quoted message said:

Quoted message said:

Quoted message said:

On 23 Jan 2007 11:20:14 -0800, [email hidden] wrote:

Quoted message said:

Quoted message said:

>[email hidden] wrote:
>> On 23 Jan 2007 03:38:22 -0800, [email hidden] wrote:

Quoted message said:

Quoted message said:

>> >Hi All,

Quoted message said:

Quoted message said:

>> >A few years ago some of you guys were kind enough to supply some info
>> >on how to mathematically estimate the power savings possible with Zipp
>> >404 wheels over normal wheels based on their published resistance
>> >numbers.

Quoted message said:

Quoted message said:

>> >I cannot locate this thread, as it seems to have been expunged.

Quoted message said:

Quoted message said:

>> >Anyone feel like showing the math again?

Quoted message said:

Quoted message said:

>> >Thanks!

Quoted message said:

Quoted message said:

>> >Joseph

Quoted message said:

Quoted message said:

>> Dear Joseph,

Quoted message said:

Quoted message said:

>>http://groups.google.com/group/rec.bicycles.tech/browse_frm/thread/32...

Quoted message said:

Quoted message said:

>> Cheers,

Quoted message said:

Quoted message said:

>> Carl Fogel

Quoted message said:

Quoted message said:

>What would I do without you guys? Why couldn't I find that thread?

Quoted message said:

Quoted message said:

>Thanks!

Quoted message said:

Quoted message said:

>Joseph

Quoted message said:

Quoted message said:

Dear Joseph,

Quoted message said:

Quoted message said:

I just searched the Google Group RBT archive for zipp, 404, drag, and
37 (the 37 kmh speed that you mentioned later in the thread that you
had calculated):

Quoted message said:

Quoted message said:

http://groups.google.com/group/rec.bicycles.tech/search?group=rec.bic...

Quoted message said:

Quoted message said:

You could also limit a search for zipp + 404 + drag to your own posts
with the advanced search:

Quoted message said:

Quoted message said:

http://groups.google.com/groups/search?lr=&safe=off&num=10&q=zipp+404+drag+ [email hidden]&safe=off&qt_s=Search

Quoted message said:

Quoted message said:

Cheers,

Quoted message said:

Quoted message said:

Carl Fogel

Quoted message said:

I tried "joseph 404 watts" and similar but couldn't find it. Loose nut
behind the wheel I suppose.

Quoted message said:

JosephDear Joseph,

I pussect a tpyo, since that will find the post right away:

http://groups.google.com/group/rec.bicycles.tech/search?group=rec.bic...

Cheesr,

Carl Fogle

I think it was those goofs over at Google monkeying with their system.
Check the new snazzy look!

Joesph

Qui si parla Campagnolo said:

Quoted message said:

Hi All,

A few years ago some of you guys were kind enough to supply some info
on how to mathematically estimate the power savings possible with Zipp
404 wheels over normal wheels based on their published resistance
numbers.

I cannot locate this thread, as it seems to have been expunged.

Anyone feel like showing the math again?

Thanks!

Joseph

As the curmudgeon, gotta remind you that these 'pure' numbers come from
a wind tunnel. Other tough to predict and control factors like the
weather and rider's performance, is at least as important. But tough to
use to sell wheels.

Is it allowed to use wheels that are demonstrated fast in the wind
tunnel and also work on rider performance? Or are those two things
mutually exclusive and you have to pick one or the other?
--
JT
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