I was just curious if it had been done, and if not why? To me that's like saying why not just get a bigger wing instead of adding endplates to one. Endplates make a wing much more effective, so I was wondering if the same would happen with a spoiler.
Also a wider or longer spoiler will add more drag as well. If I add 'endplates' to this one I don't have to make a new spoiler, and maybe those endplates have an improved down force to drag ratio compared to making a larger spoiler.

guess I'll just try it myself!

 

Google Jeff Keisel and his EM car. Must be worth something for him to do it.

 

Endplates have also another interesting effect if you think the car when cornering (or even sliding). Downforce in straight line does not matter much.

 

 

thrust vectoring.

 

Until you get to the braking zone, then it's critical to lap times.

 

 

I was half kidding with that but... if you consider how hard the end-plates might try to straighten the car out when its sideways, then maybe that term loosely applies.

 

That. Depends on the relative size of endplates of course (and their stiffness), but it can be pretty significant. Also, Emilio is (as usual) right, I should have said "excluding braking"

 

 

 

i like that ^

 

"Avast! Reverse engines! Broach to starboard!"

 

Speaking of...who said active aero should be limited on the horizontal plane of the wing anyways? That's something my ex-FSAE team is actually experimenting with.

 

IIRC both Porsche and Audi had some cheater end plates on their LMP1 a few years ago where there was some amount of "deflection".

 

Toyota and Porsche both had rear body work that flexed down at high speed to reduce the wing angle. Porsche's got caught before the race and they had to fix the issue, Toyota did not get caught and ran the 24hrs of LeMan with it.

http://www.mulsannescorner.com/RCELeMans2014.html

 

Yes, there was that, but also this -
Porsche 919 (9R9 MY15-MY17) - Racecar Engineering

 

 

The car finally is on its wheels, so I had to wheel it out for some pics.

 

Really professional looking. The fastback really helps the lines of the car.