[kach22i]

Originally Posted by freebeard

The rise in the beltline suggests a downward rolling vortex below the edge, but it also suggests downforce. The rear has a sharp, 'tearing edge'. The pyramidal roof is logical for the single occupant.

A little sidebar discussion is what I asked for, so here it goes.

The vortex you mention is the one I have concern over.

Tandem two seat occupancy FYI.

Big flat planes with sharp edges no matter what angle they are pitched at are red flags in my opinion.

Example-1:
Vortex breakdown as an aerodynamic control | TRACE

Depending on the exact shape of the vehicle, low-pressure structures can appear at the rear end of the car when the incoming air flow encounters geometric singularities (abrupt change of angle, deflectors, etc.). All these low-pressure structures form a drag force and are responsible of an increase of power consumption.

Example-2
BLAT? - F1technical.net

This is how air behaves on a delta wing

So yes I agree, high degree of downforce (or would it be UPLIFT ?), but only because of incredible energy sucking vortexes along the top side edges. A gentle round edge is better along the side edge because it equalizes the top and side pressures so vortexes are slower to form or will not form at all, ideally that is.

This vehicle is an excellent example because it challenges our initial impressions. It looks real aerodynamic, but the air behaves differently I suspect.

The saying I once read online between car guys discussing a curvy Porsche verses an angular Lamborghini went something like this; they both look nice, but which car would you rather hand wash and wax?

The P-car or the Lambo, who's contours would be friendlier to your wrists?

Is the air not twisting like your wrist to follow the form?

Which shape is less strenuous to follow your hand over?

The blessed shape of the holy curve from the Church of Aerodynamics.

Another look at this creation, then look back up at those CFL images.

United Nude Lo Res Concept Car - Boston Commons High Tech Network



United Nude Lo Res Concept Car | HiConsumption



United Nude Lo Res Concept Car | HiConsumption


If you go to the black car links, the shape was derived from a Lambo, a computer blunted it down to it's most primitive angles. Less simple forms were built prior to this one which look more like the familiar super-car. This version is the ultimate abstraction.

Sidebar to the sidebar, I found this neat little paper while looking for images to support my argument. Perhaps a worth looking at if you have some time.

Downforce without wings
https://lucky13racing.wordpress.com/

Flow cannot be divided, what happens in one-part affects what happens in another. Therefore, a front spoiler will affect a rear diffuser and vice versa.