Interesting Aerodynamic Cars (Mike Vetter's ETV, also Avion)

[euromodder]

Most of these designs are evolutionary.
They start with a shape and perfect parts of it from year to year / race to race.

These sides also show a sharp line aft , allowing the air to detach cleanly.
But the later model introduces the banana-shape on the sides rather than this square affair.

[Sven7]

I wonder why they didn't fully boat tail to the rear of the wheels.

Found these today in an unrelated search.

















C1 is a 62
C2 is a 63 Split Window
C3 is a 70
C4 is a 90 ZR1

Interesting they used a '62 for a C1 instead of a '53 or '57.

Anyway, here's the link.

http://www.corvetteguruforum.com/mod...?post_id=81485

[Sven7]

[NeilBlanchard]

Another streamliner from Germany in the 1930's -- they apparently had some of the best highways and could drive fast enough for aero drag to really matter. Here's the 1937 Adler Trumpf:







The Cd of a very similar car is noted at 0.23, and it was raced at Le Mans by the first woman driver ever in that race; named Anne-C cile Rose-Itier.

[aerohead]

It's amazing that the car survives to this day.She's a sweety.I think it was Paul Jaray's favorite.
These Kombination Form cars were heavily criticized for the 'sameness.'
What a pity!

[jime57]

Would be interesting to see some smoke on that in a wind tunnel. The rear greenhouse looks a bit sharp. The rest is pretty nice.

[aerohead]

Originally Posted by jimepting

Would be interesting to see some smoke on that in a wind tunnel. The rear greenhouse looks a bit sharp. The rest is pretty nice.

I agree.If they went by tufts alone (and I suspect that this is all they had available at the time),that they might infer fully attached flow,when in reality,the longitudinal vortices were holding the tufts in place.
The lower body should support good flow.
The plan taper will be designed more around a 2-D flow section ( I believe that a 3.94:1 section has the lowest drag) which around the sides should be very good.
The suspect area are the two greenhouse side to roof intersections and I would bet they're dirty.
Since they have the car it would be instructive to park it in the test section of the nearest tunnel and fire up the fan.
She would look very futuristic to many today.

[Sven7]

Not a car but this bike will be interesting in those doing fairings.

1986 Elf 1000R (I think...)

It doesn't seem to have plan offset to cover the rider's legs, which could be aerodynamically problematic. Nice to see the evolution of the "dustbin" fairings though.



Dustbin Moto Guzzi of iirc the 50's


V8... but this fairing doesn't cover the legs.

[Sven7]

NSU Ro80. Note flow separation and apparent vortexes coming off the rear window.

[aerohead]

Originally Posted by Sven7

NSU Ro80. Note flow separation and apparent vortexes coming off the rear window.

Yes,the air is just trash back there.