Quote:
Originally Posted by fastflyer
Other example:
Rear undertray of several Toyota. Those two fins has any explanation? |
I think 'fin' is the proper term for which to describe them.I don't believe they are concealing a body eruption under the car for which they would serve as a drag-reducing fairing.They are very well streamlined,and would not themselves produce any appreciable drag.
I'm not familiar with the particular
cars they belong on,and can only guess that these fins are there simply to direct the flow longitudinally,and prevent any transverse flow at the point of their attachment under the car.Why? I don't know.
It's also possible,that in a crosswind gust,the fins might provide some pressure-biased,directional stability,otherwise lacking without them.The gang of 'strakes' under the tail of the 1987 GM/AeroVironment SunRaycer,solar racer,were used exactly for this purpose.