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Old 07-07-2009, 04:50 PM   #64 (permalink)
aerohead
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weathervane

Quote:
Originally Posted by bombloader View Post
Bad idea if your worried about crosswinds. A vertical fin would tend to turn the vehicle into the wind, like a weathervane. This is why airplanes have them, it keeps the nose pointed into the relative wind. You want a car or motorcycle to stay pointed down the road, not swerve into the wind. Besides, you would add drag.
If the car is going to yaw,then this is the preferred way to do it.Cars are designed such that the center of pressure is always behind the CG,so in a wind gust,should the car yaw,it DOES turn into the wind,cancelling the yawing-moment.Otherwise,as the nose turns with the wind,it catches more air,increasing the yawing-moment,and can reach such strength,that the steering is overwhelmed and you crash.
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