Car with "active aerodynamics"

[some_other_dave]

Originally Posted by botsapper

Always intrigued by aftermarket Aeromotions moveable wing; active split rear wing contributing to left/right rear downforce bias, high-drag braking and top speed low-drag wing angles.

How cute! They used electric motors to replicate what the original 917 and one of the 908s did with linkages from the wings to the suspension.

-soD

[aerohead]

Circa 1984,at GM's exhibit at Epcot Center,Orlando,Florida,they had a concept car which had an active diffuser which would lower to near-horizontal at a pre-programmed velocity,presumably when you were on the highway and ground clearance wasn't as much an issue.
This diffuser was designed specifically for improved MPG and they included an animation depicting the improved airflow.

[fabrio.]

I remember these:

2005 Citroen C Sportlounge







2005 Citroen C-Sportlounge Concept Images, Information and History | Conceptcarz.com

and the Fioravanti Flair



1996 Fioravanti Flair - Studios

[LogicPro]

Thanks! The Citroen C Sportlounge is exactly the car that I saw! Actually I didn't remember that it was only a concept. Now I'll read the articles the links you posted.

Grazie mille, fabrio... non mi sarebbe mai venuta in mente

[NHB]

Originally Posted by freebeard

An example: Difflow Diffusers - Lotus Elise and Exige Flat Track Diffuser

This is an non-active aftermarket part on a Lotus Elise. I'd like to see "a med-low price car, a hatchback" with that stock. So I'll watch the thread.

Why you would like to have a diffuser like that under a hatchback?

[freebeard]

'See' not 'have'.

Originally Posted by LogicPro

It was probably a med-low price car, a hatchback if I'm not mistaken, which was launched 4 or 5 years ago more or less.

I actually like the Citroen C Sportlounge, except for the name.

Also Pagani Huayra have active air control flaps front and rear.

Demoed here

by Jay Leno at 3:25->3:32 and 4:57->5:08.

[some_other_dave]

Originally Posted by NHB

Why you would like to have a diffuser like that under a hatchback?

Either to accelerate the air going out the back, providing down-force, or just for looks.

-soD

[freebeard]

I thought it was a reasonable question. This suggests a diffuser would increase the drag on an hatchback:


But, yeah, I meant 'see' as in

[NHB]

Originally Posted by some_other_dave

Either to accelerate the air going out the back, providing down-force, or just for looks.

-soD

It doesn't help with aerodynamics. You won't see higher mpg or cornering speed.