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Message: <blockquote data-quote="saat" data-source="post: 345420" data-attributes="member: 77">Not wishing to enter into an argument with you, but as a very experienced professional aircraft engineer, I can with great certainty say that the spoiler on the wiper blade has little to do with improving streamlining or affecting drag coefficeint or reducing noise. I think the terms are used too loosely n this case.  There are devices that improves drag coefficient or streamlining but increases lift the opposite to down force. These are called wings and in some cases flaps and slats There are other devices that are meant to destroy lift but does not create down force. these are called lift dumper or spoliers on aircraft. But the spoiler on the wiper is about creating downforce much like the spoliers at the back of the race cars. Technically, drag coefficient and streamlining does necesarily have real relationship with lift or downforce. They are about measurement of drag. On the cosmetic front, I agree with you totally and that's why I want it.</blockquote>