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Message: <blockquote data-quote="Schwepps" data-source="post: 355997" data-attributes="member: 3592">You're very correct valkrie, but they don't even reduce the uplift tendency as you put it. Spoilers do not create downforce. They're meant to reduce drag and thus improve fuel consumption. The purpose of a spoiler at the trailing edge of the roof or boot is to reduce the tumbling of air over the roof/boot edge creating turbulence and a low pressure area (Bernoulli effect), which causes drag and instability.Downforce can only be created by a wing with a cross-section similar to an aircraft wing, but fitted upside down. Then the low pressure area is the underside of the wing, pulling it down, the opposite of an aircraft wing. The majority of rear spoilers and wings fitted on cars out there are totally useless for anything but decoration. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />A front spoiler or air dam CAN reduce the volume of air going under the car, thus stabilizing it. But to do that, the air dam has to have no more than 5cm of ground clearance, which won't be practical on a road car. To create downforce, you need diffusers on the underside of the car (note the double-diffuser issue in this year's F1) to speed up the air, create the Bernoulli effect and thus pull the car down. So the majority of front spoilers out there are also useless. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /></blockquote>

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