|
Calm. Most of the time you're not getting a pure head or tail wind and there is some crosswind component. The more of a crosswind vector you get, the more of a side load you're putting on your tires (the equivalent of light cornering with its increased RR) and vehicles typically have much worse Cd for a wind coming in at an angle than they do for a wind coming from straight ahead (increased aero drag). Then there's the exponential wind velocity factor mentioned above. But even if you drop your ground speed to compensate for the increased airspeed during the headwind portion of your drive and increase your groundspeed while driving in a tailwind, the crosswinds and gusts are still going to increase your RR and aero drag.
|