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according to felt "After repeated tests, Felt’s engineers determined that riders experience winds at 2.5 to 5 degrees of yaw for up to 80 percent of the track’s length."
Jaap-
Felt’s engineers determined that riders experience winds at 2.5 to 5 degrees of yaw for up to 80 percent of the track’s length
Yes, and always from the same side on the track. It's a special case. You can lower the drag by moving the drive to the best side if your crosswind is always coming from the same side, but you can't necessarily reduce it further by adding another drive train on the other side.
If you want to test your hypothesis against people who actually know about this stuff, take it to the Aerodynamics thread so that the Porn people don't have to put up with too much chat.
gbj_tester
It's not as simple as that. The drag difference occurs when there's a cross wind, and it's the drag of the whole bike which is slightly lower if the wind is coming from the one side compared with it coming from the other at the same speed. If having a second chainring adds drag when there's no crosswind, then that could easily outweigh the benefit of having made the crosswind drag symmetrical, and the interference between the two chainrings might even increase the absolute drag in crosswinds even while making it symmetrical.