Wheel dynamics ? - Stage 9

ST said:

Very interesting!!

http://www.cyclingnews.com/photos/2006/tour06/index.php?id=/photos/2006/tour
06/tour069/DV91615

I never knew my spokes distorted and took this much stress! Is this why some
people break spokes a lot? Because they do not use spokes that are, I guess
for lack of a more educated word, elastic enough (metallurgy wise..)

Is this why more wheels are starting to use those funky non-metal types of
spokes??

They sprint so hard they make the ground blur!
The camera shutter moves at and with the speed of the lead rider not the
wheels. Since the spokes are traveling at a different speed than the
riders they appear distorted. Or something like that.

The classic of all classic examples, obtainable with an old style focal
plane shutter (where the shutter paints light across the film, when
combined with panning can cause some cool [censored])
http://www.masters-of-photography.com/L/lartigue/lartigue_car_trip_full.html

ST said:

Very interesting!!

http://www.cyclingnews.com/photos/2006/tour06/index.php?id=/photos/2006/tour
06/tour069/DV91615

I never knew my spokes distorted and took this much stress! Is this why some
people break spokes a lot? Because they do not use spokes that are, I guess
for lack of a more educated word, elastic enough (metallurgy wise..)

Amazing isn't it. Even at lower levels of the sport the stresses are
huge -- this is from a cat 4 race my club put on this past Saturday:

http://www.velocityresults.net/images/112.jpg

JT

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In article
<[email hidden]>,

WeaselPoopPower said:

ST said:

Very interesting!!

http://www.cyclingnews.com/photos/2006/tour06/index.php?id=/photos/2006/tour
06/tour069/DV91615

I never knew my spokes distorted and took this much stress! Is this why some
people break spokes a lot? Because they do not use spokes that are, I guess
for lack of a more educated word, elastic enough (metallurgy wise..)

Is this why more wheels are starting to use those funky non-metal types of
spokes??

They sprint so hard they make the ground blur!
The camera shutter moves at and with the speed of the lead rider not the
wheels. Since the spokes are traveling at a different speed than the
riders they appear distorted. Or something like that.

The classic of all classic examples, obtainable with an old style focal
plane shutter (where the shutter paints light across the film, when
combined with panning can cause some cool [censored])
http://www.masters-of-photography.com/L/lartigue/lartigue_car_trip_full.html

Not the same phenomenon. The bicycle wheels are not
distorted in the same way. The finish line camera takes
one pixel wide photographs of the finish line many time a
second. The composite image is a graph of the finish line
over time where each vertical stripe of pixels has a clock
time associated with it.

--
Michael Press

in message <[email hidden]>, John Forrest

Tomlinson (') said:

ST said:

Very interesting!!

http://www.cyclingnews.com/photos/2006/tour06/index.php?id=/photos/2006/tour
06/tour069/DV91615

I never knew my spokes distorted and took this much stress! Is this why
some people break spokes a lot? Because they do not use spokes that
are, I guess for lack of a more educated word, elastic enough
(metallurgy wise..)

Amazing isn't it. Even at lower levels of the sport the stresses are
huge -- this is from a cat 4 race my club put on this past Saturday:

http://www.velocityresults.net/images/112.jpg

Hey! On our club rides we cycle so fast the road gets warped:

http://www.stewartry-wheelers.org/wheelers/story/article_50.html

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/

Quoted message said:

Amazing isn't it. Even at lower levels of the sport the stresses are
huge -- this is from a cat 4 race my club put on this past Saturday:

Mmm, that deformation seems less than a stationairy kids bike:
http://www.funpic.hu/files/pics/00029/00029407.jpg

"John Forrest Tomlinson" <[email hidden]> wrote in message news:[email hidden]...

Quoted message said:

ST said:

Very interesting!!

http://www.cyclingnews.com/photos/2006/tour06/index.php?id=/photos/2006/tour
06/tour069/DV91615

I never knew my spokes distorted and took this much stress! Is this why some
people break spokes a lot? Because they do not use spokes that are, I guess
for lack of a more educated word, elastic enough (metallurgy wise..)

Amazing isn't it. Even at lower levels of the sport the stresses are
huge -- this is from a cat 4 race my club put on this past Saturday:

http://www.velocityresults.net/images/112.jpg

JT

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Ronald said:

Quoted message said:

Amazing isn't it. Even at lower levels of the sport the stresses are
huge -- this is from a cat 4 race my club put on this past Saturday:

Mmm, that deformation seems less than a stationairy kids bike:
http://www.funpic.hu/files/pics/00029/00029407.jpg

You silly, the generator got caught in the spokes and messed the wheel up like
that.

I like your invisible front fender.

Ron

Quoted message said:

"John Forrest Tomlinson" <[email hidden]> wrote in message news:[email hidden]...

Quoted message said:

ST said:

Very interesting!!

http://www.cyclingnews.com/photos/2006/tour06/index.php?id=/photos/2006/tour
06/tour069/DV91615

I never knew my spokes distorted and took this much stress! Is this why some
people break spokes a lot? Because they do not use spokes that are, I guess
for lack of a more educated word, elastic enough (metallurgy wise..)

Amazing isn't it. Even at lower levels of the sport the stresses are
huge -- this is from a cat 4 race my club put on this past Saturday:

http://www.velocityresults.net/images/112.jpg

JT

****************************
Remove "remove" to reply
Visit http://www.jt10000.com
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Einstein explained this a long time ago with his theory of general
relativity. At high speeds, time slows down and apparent distance
increases. The spokes are traveling much faster than the rider, so due
to relativistic effects, they much travel through a longer distance and
appear warped to a stationary viewer.

ST said:

Very interesting!!

http://www.cyclingnews.com/photos/2006/tour06/index.php?id=/photos/2006/tour
06/tour069/DV91615

I never knew my spokes distorted and took this much stress! Is this why some
people break spokes a lot? Because they do not use spokes that are, I guess
for lack of a more educated word, elastic enough (metallurgy wise..)

Is this why more wheels are starting to use those funky non-metal types of
spokes??

Philo said:

Einstein explained this a long time ago with his theory of general
relativity. At high speeds, time slows down and apparent distance
increases. The spokes are traveling much faster than the rider, so due
to relativistic effects, they much travel through a longer distance and
appear warped to a stationary viewer.

So what's the best way as viewers to reduce the warp effect - run fast
or sit on our thumbs and rotate?

Curtis L. Russell
Odenton, MD (USA)
Just someone on two wheels...