Quote:
Originally Posted by vteco
So it sounds like you got and liked a fair amount of negative lift as a benefit towards traction.
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Yes, but I cannot overemphasize that 10% downward slope roof wing per PDF on post #5 results in positive lift, whereas my experiment with straight horizontal wing used in conjunction with bed cover and rear spoiler is net reduction in lift (via seat of the pants opinion and visual confirmation of bed cover deflection/depression.
As I recall the CFD study on my pickup truck done by an aerodynamicist confirmed some theories but also downplayed other theories of mine.
One item was the air slot gap between trailing edge of cab and leading edge of wing. The CFD study confirmed it was at work, but at such a small scale as it may be considered unnecessary or insignificant.
However when looking at a Honda Civic 2021 hatchback in the parking lot at work where the taillights blend into a rear wing in lieu of rear deck or rear spoiler one may conclude more advanced studies have given merit to the air slot approach.
Similar to below, air slots top and bottom:
https://www.reddit.com/r/Honda/comme...ort/?rdt=54602
Another similar photo:
https://www.directautopartsonline.co...ear-bumper-oem