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Originally Posted by SevenTwentyNine
(Post 17610595)
No, that's a simplistic, childish, and frankly irritating attempt at minimizing what I said, so no, you don't understand me - and based on the condescending tone of the way you wrote your message which seems intentional, I don't see a point in carrying a dialogue with you. Look at the way I've been discussing with Chaadster for an example of worth it dialogue.
http://img.photobucket.com/albums/v8...psyireecpv.jpg |
Originally Posted by Silvercivic27
(Post 17611658)
If you're not contributing to helping OP you're useless to the thread. Try again. |
Originally Posted by gregf83
(Post 17611599)
Incorrect. The performance advantage of deeper wheels increases with yaw angle. It's the apparent wind angle that counts. Riding 25mph with a 10mph crosswind yields a yaw angle of around 22 degrees. Yaw angle decreases with rider speed. The only time you're likely to see a 90 degree crosswind is if you aren't moving. In the graph below the red line is from a set of Mavic Open Pros:
For terminological clarity (from CyclingPowerLab's site): Given that most of us ride significantly faster than the meteorological wind is blowing, most of the time, the resistance wind tends to dominate. For example, if we ride at 40kph (24.85mph) with a 10kph (6.21mph) full-on sidewind (meteorological wind approaching at 90 degrees to our ride direction) the effective wind has a yaw angle of just 14 degrees. In fact modelling suggests that somewhere between 50 and 70 percent (let's say 2/3rds) of effective wind yaw angles experienced by a rider are lower than 10 degrees, the faster your ride, the higher this percentage. The same research suggests that a further 30 percent (let's say 1/3rd) of effective wind yaw angles are between 10 and 20 degrees. (http://www.cyclingpowerlab.com/Yaw.aspx) |
Originally Posted by SevenTwentyNine
(Post 17611670)
Glad to see you're an idiot.
If you're not contributing to helping OP you're useless to the thread. Try again. |
Originally Posted by chaadster
(Post 17611701)
He's not an idiot, he was making fun of idiot comments...there's a difference.
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Originally Posted by Stucky
(Post 17610777)
Since good alloy nom-aero wheels can be lighter than deep aero wheels, the minimal aero benefits of the deep wheels are probably negated by the weight penalty.
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Originally Posted by chaadster
(Post 17611695)
Thank you…that was exactly my point to Seventwentynine earlier. Zipp's 808s also generate negative drag at higher yaw, providing, as I said earlier, actual propulsive force. As you rightly state, slower riders actually gain more aero advantage than faster riders because of the higher yaw due to slower speeds in the same wind conditions.
For terminological clarity (from CyclingPowerLab's site): Given that most of us ride significantly faster than the meteorological wind is blowing, most of the time, the resistance wind tends to dominate. For example, if we ride at 40kph (24.85mph) with a 10kph (6.21mph) full-on sidewind (meteorological wind approaching at 90 degrees to our ride direction) the effective wind has a yaw angle of just 14 degrees. In fact modelling suggests that somewhere between 50 and 70 percent (let's say 2/3rds) of effective wind yaw angles experienced by a rider are lower than 10 degrees, the faster your ride, the higher this percentage. The same research suggests that a further 30 percent (let's say 1/3rd) of effective wind yaw angles are between 10 and 20 degrees. (http://www.cyclingpowerlab.com/Yaw.aspx) If that was your point I didn't get it beyond the 808 propulsive force you mentioned.... for some reason the other poster did a significantly better job at providing some insight on the topic as a whole that I got better this time. |
Looks like thread is done. Thanks for participating.
Buh bye. |
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