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Madone: 10 watts and 1 minute saved in a 200k race.(6 posts)

Madone: 10 watts and 1 minute saved in a 200k race.Sintesi
Aug 27, 2003 7:09 AM
"We were quite confident in the virtual prototype, confident enough that we did not do physical wind tunnel testing until June. In fact, we were at the Texas A&M Wind Tunnel the same week Lance was winning the Dauphine Libere in France. It was then that the virtual prototype was confirmed with a 10 watt and 1 minute time savings over a 200k stage race."

I'm one of the guys who actually likes the look of this bike but it's amazing how much goes into wittling a few seconds off one's race times. Here's the article:

http://lancearmstrong.com/lance/online2.nsf/html/msagan
re: Madone: 10 watts and 1 minute saved in a 200k race.Heron Todd
Aug 27, 2003 7:32 AM
The original OCLV frames are not all that aerodynamic. I saw some test data that showed that the Specialized M4 S-Works frame, with aero-shaped aluminum tubing, was about 10% more aerodynamic than the OCLV or Cannondale frames. When you look at the size of the tubes, this makes sense. However, when you consider that the frame accounts for only about 10% of the total aerodynamic drag of the rider and bike, there's not a lot to be gained. A 10% improvement on the frame equals a 1% improvement overall.

Todd Kuzma
Heron Bicycles
LaSalle, IL 815-223-1776
http://www.heronbicycles.com
re: Madone: 10 watts and 1 minute saved in a 200k race.Alex-in-Evanston
Aug 27, 2003 7:45 AM
I'm amazed that the frame even accounts for 10% of rider and bike combined drag. The head, torso, arms, legs, front wheel, bars, etc. make up a pretty big sail.

I would have guessed the brake levers to have a greater effect on total drag than a little seat tube fairing and ovalized down tube.

Alex

BTW, where's LaSalle?
re: Madone: 10 watts and 1 minute saved in a 200k race.Heron Todd
Aug 27, 2003 12:09 PM
Yes, it seemed that 10% should be the entire bike, but the info I saw was not clear about that. In any case, I think that the frame is a small part of the overall. I would be skeptical of any claims that a change to the profile of the frame would result in a large energy savings or speed gain.

LaSalle is about 100 miles southwest of Chicago. It's right at the intersection of I-80 and I-39.

Todd Kuzma
Heron Bicycles
LaSalle, IL 815-223-1776
http://www.heronbicycles.com
You and I...MShaw
Aug 27, 2003 8:41 AM
...probably wouldn't feel that 1%, but in the TdF every little edge helps (-ed?).

Hey, even if it is psychological, it still helps!

Mike
1 minute is hugefiltersweep
Aug 27, 2003 12:02 PM
it is about a half mile...