2020 Hyundai 'Prophecy' concept
 

On page 29 of the July,2020, MOTOR TREND, are a couple of pics of their new concept.
She's a 'looker', and the author mentioned ' great lengths to minimize aero drag to maximize its range............. carefully swept-back tail to keep airflow attached as long as possible.'
There are pages of photos online.
With homage to the 911, Tesla,and M-B IAA, I'm uncertain what the drag could be. The existence of a rear spoiler suggests some aero compromise. No mirrors.
Windscreen looks like compound curvature. Small wheel arch gaps. Rear boat-tailing seems too aggressive.
She might make potential Porsche Taycan buyers take a look.
If they ever produced it, as a Hyundai partner, Canoo, BEV.

https://www.hyundai.com/eu/about-hyu...cept-car.html#

https://s7g10.scene7.com/is/image/hy...853&fit=wrap,1

A great example of a car that without the rear spoiler, would have a lot of lift. Lots of attached flow over that camber!

Its interior may look quite dated, but the exterior doesn't look so bad at all for a 10-year old show-car.

It's a 2020 concept car.

I don't know if aerohead [as OP] can edit the thread title; it may take the mods. Worth fixing though.

The tight surface development over the rear wheel wells seems helpful for reducing the wake, compared with the 'shoulders' or 'haunches' on cars like 1967 Impala or 2010 Dodge Charger.

Looks like they forgot to close the trunk lid.

example
 

Wrong again! Keep looking.

wake
 

The car is a Jaray, Combination-form hybrid. The lower body is pure Jaray, whereas the greenhouse lacks Jaray's plan-view boat-tailing solution.
The side elevation contour is too 'fast,' exceeding 23-degrees,producing separation,vorticity, and the famous fastback downwash; like the Porsche 911. And like the 911 Carrera, uses the spoiler as a palliative to address the flow separation.
Without a true-length overhead plan-view, it's hard to know if the boat-tailing of the rear fenders exceeds what the flow can survive.
The rear slanting truncation is a lineal descendant of Alfa Romeo Zagato TZ3/ Mercedes- Benz IAA.

Oh I see that.

Good point.

It does need that rear tray/whale tail.

I like it better than a wagon/shooting brake design, but it is not as aerodynamic because of air detachment.

detachment
 

For their 2019 Genesis G70 3.3T Dynamic Edition, a small reflex at the trailing edge was all that was deemed necessary for reattachment.

Please note that Aerohead is here spreading his theory that rear spoilers are all about flow re-attachment. (Something that was last relevant to car shapes prior to about the mid 1980s, where early separation occurred, eg at the end of the roof.)

So that people don't get led astray, for a car of this shape, that idea is completely wrong.

Interesting. However that interior reminds me of some science-fiction inspirations from the '80s and '90s.

Yeah, good point both. I see that too. Angle is too fast, aerohead said. But the spoiler and the soap bar shape are cool looking, anyway.

Made me look.

I'm reminded of 1960s Porsche and Cal-Look VWs.
https://i.pinimg.com/236x/22/99/96/2...oundstooth.jpg
https://i.pinimg.com/236x/22/99/96/2...oundstooth.jpg

There must be a better term or description for this.

I have called "filling out the template profile" in the past.

I'd like to call it a "flicker" or "lick" because these rear Bonneville like trays flick up and lick the edge of the aero-template.

That was a good reference. Well, since it resembles a Porsche Panamera somehow, wouldn't be so surprising to also have other elements which may seem quite Porsche-ish :D

wrong
 

Proof? Are we in an anti-matter universe now?

filling or 'lofting'
 

This would be a pretty good word. This is what Kamm/ Fachsenfeld did at FKFS to create the 'Kamm-back.' Take the low-Verjungungsverhaltnisse Jaray body and loft its aft-body up to the 'template' contour. It gives you more useful internal volume, kills separation, kills lift,to make a 'neutral' lift body.
Drag coefficient is dependent upon the Vergungungsverhaltnisse (the ratio of the length of the aft-body,divided by the body height (not the overall height of the car), presented as a ratio. The lowest drag is achieved at V = 5:1.

I'm just glad the thread title gets the year [of the concept] right, now.

(My bold in the above quote.) You are spreading lies again. As anyone who doesn't subscribe to the strange theories of 'Aerohead' would immediately realise, the shape you nominate has a lot of lift. The Porsche Taycan is just the latest example - but a good one because we have data for it.

Note for people keeping track, 'Aerohead' is later in the quote again spreading misleading rules of thumb.

lies
 

You sir, have impugned my dignity and honor in public, and I challenge you to a duel!
And I get to choose weapons.
And I choose fluid mechanics rather than pistols.
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On the signal, take 8-paces, turn an fire, with the best science at your disposal, and we'll let the chips fall as they may.