It is clear to me that rider B is drafting==========
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The team in the lime green kit would likely be the Kelme/Costa Blanca team in 2004. Not sure which helmets they wore, but it was likely Escartin (the rider). They’re marketing them, but a few companies have dimpled models, our kits are MS Tina, and our road jerseys are dimpled (I forget whether the skinsuits are or aren’t).
So this guy would’ve been super fast, naturally.
A dimple face should indeed work too, but what about a pimple face?
H
Hey, if it works for a golf ball…
I don’t get this what is the tecnology behind this? I know it works for golf balls, but the dimples on the golf ball put backspin on it and the ball can rise and therefore, go farther. When I think of dimples on a zipp wheel with front spin I think, it must put more force going downward on the bike… I dont get it…
i know a bunch of single girls with dimpled skin on their thighs. We call it hail damage. LMK if interested (yes, I’m kidding)
I am confused, the website says it would be a good idea…
"**Boeing **is using this patented technology on the wing fairing of its new F-18 E/F strike fighter. Dimples help the F–18, and dimples can help you. "
or is this all a joke?
How dimples work;
They convert laminar flow to turbulent flow.
This can be good as turbulent flow sticks better to a surface than laminar. The pic at the start with the drag behind a rider; it’s sort of right. Flow separating from the surface is what causes most drag and laminar flow separates sooner than turbulent flow thus the separated region is bigger therefore drag increases.
It only works in situations that have the correct speeds (amongst other things) thus while it may work on something travelling at 30mph, it may not work on something that’s doing 300mph.
You do need to know where the flow separates from though so that you can put the device that causes the transition to turbulent flow just upsteam of that point.
It doesn’t need to be dimples; if you sew a line of velcro on the back of your jersey, that’ll do the same thing. Again though, you need to know where to put it on. Doimples are used on rotating objects because the direction of flow is constantly changing.
They convert laminar flow to turbulent flow.
I know this is way off topic, but this concept has been used in hydro dynamics on the bottom of race boats with great proven sucess. I don’t know squat about aero dynamics.
I am confused, the website says it would be a good idea…
"**Boeing **is using this patented technology on the wing fairing of its new F-18 E/F strike fighter. Dimples help the F–18, and dimples can help you. "
The point is this: The jersey is covered by dimples. The post to which I responded suggested the same for airplanes. The first paragraph of the article to which I linked specifically talks about dimples all over a golf ball being good, but, all over an airplane being a really, really bad idea.
It’s hard to argue with the graphic that clearly demonstrates “reduced drag,” but this article could suggest that dimples on a jersey are a bad idea too because, like the body of the plane, the jersey isn’t spinning. I can’t even spell physisist and won’t pretend to understand aerodynamics, but my guess is, the makers of that jersey don’t understand the science any better than I do–they’re just trying to piggyback on Zipp’s marketing.
I agree whole-heartedly – dimples covering the entire surface of the jersey would arguably make it LESS aero, as the article suggests. As msuguy’s graphic demonstrates (and as supported by the link to the article I provided), strategic placement of dimples may have a positive aero effect. However, placing them all over a static object (e.g., a jersey or the entire body of an airplane) is a bad idea. This was the point of my original post and link to the article.
http://i28.tinypic.com/w8pzrm.jpg
I particularly like how the airflow is vertically down behind the helmet and yet stays attached! Obviously very accurate!
Hey, if it works for a golf ball…
I don’t get this what is the tecnology behind this? I know it works for golf balls, but the dimples on the golf ball put backspin on it and the ball can rise and therefore, go farther. When I think of dimples on a zipp wheel with front spin I think, it must put more force going downward on the bike… I dont get it…
Actually the golf club applies the backspin. Wedges apply more spin and drivers less.
The dimples provide lift.
In recent years the dimples have become much more sophisticated to produce less drag than they used to.
When they switched from ‘featheries’ to gutta percha ball, the patter wouldn’t ‘carry.’ After getting dinged a few times they flew much better. That started the dimples and pimples on gold balls. I guess the pimples didn’t work as well, so dimples took over. In the eighties golf ball companies began to look more seriously at dimple technology when dunlop developed the dodecahedron pattern. I think that was the start of really serious dimpling.
Why aren’t airplanes, drag racers, and other things concerned with aerodynamics not catching on to this wonder solution for speed?
Funny you mention that…my Audi IS dimppled on the bottom, as is the new Porsche and Ferrari models…
I have noticed when I race in a Tri and it is colder (I just wear shorts), I usually have goose bums all over my body and I seem to have better bike splits? I say don’t buy the jersey. Just don’t wear one at all in the colder races.
Actually, I use to use those ribbed condoms but they made me come to fast so my wife made me stop using them.
Maybe dimpling is not always a good thing?
I have noticed when I race in a Tri and it is colder (I just wear shorts), I usually have goose bums all over my body and I seem to have better bike splits? I say don’t buy the jersey. Just don’t wear one at all in the colder races.
Actually, I use to use those ribbed condoms but they made me come to fast so my wife made me stop using them.
Maybe dimpling is not always a good thing?
The ribs go on the outside 