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

[seifrob]

I don´t know if this is the right thread, but still:

Tatra 603 - air cooled rear V8 engine, well known here. This Tatra is interesting because of its ejector cooling (exhaust gas augmented). Article is only in Czech (sorry), but it says this allowed to save 20 hp on cooling vents.




source of the images: auto.idnes.cz

Article (in czech): auto.idnes.cz,
Photo-gallery (auto.idnes.cz)

video (in czech, sorry) -

YouTube - Tatra 603 B5

[samwichse]

Originally Posted by gafhj

Cool, but shame on the way they did lights and air-con. And front license plate. Also, the front wheel arches are quite bad.
What plane is it?

Looks like a 727 nose to me:

Boeing 727

Right down to the nosecone attachment point, the double horizontal striations, those two protruding... sensors?, and the double "eyebrow" windows.

But it looks to me like they chopped it short just behind the windows, then stuck it to the body of a smaller jet (just look at the ugly aero transition between the nose area and the body).

[CFECO]

The Tatra 603...My what big Fart-cans you have! Actually a very cool car and a beautiful sound!

[samwichse]

That's a neat cooling system.

As I understand it, fresh air is drawn from the top of the engine through each bank of finned cylinders, and blown out those two huge trumpet pipes.

Inside the middle of each pipe is the exhaust outlet from each bank of 4 cylinders that propels the air around it basically like the inverse of one of those dyson airblade fans... (high speed exhaust stream in the middle instead of around the outside blowing into a venturi).

Neat for a race car, but I wouldn't want to idle it in traffic... airflow will fall precipitously below a certain threshold and I imagine there's not much cooling effect at all at idle.

[seifrob]

Yup, you are right.
IMHO it was probably sufficient because this car was driven in normal traffic (well, normal for the sixties) so I assume it was built accordingly. Besides volume of sucked air seems to be proportional to rpm so you can floor it if you need more cooling
But, I am not an engineer.
I agree it is not practical though. No muffler, 105 dB at cruise speed. Police would love it for sure.

[Cd]

Looks very much like an early Barracuda. That engine is a hemi too, correct ?

[freebeard]

'Popular Science & Mechanix' ran a story in the 1970s or so that had one grainy black and white picture of a Porsche race car with extractive exhaust from the 1950s. I've never seen it since, though I've tried. It's large mixers were in the rear fenders behind the wheel.

I'd like to see that set-up in the front of a bobber truck rat rod with the headers angle up and out at 45°.

Cd -- It reminds me of A Series of Unfortunate Events.


http://currentconfig.com/2005/12/22/lemony-snickets-a-series-of-unfortunate-events/

I've always liked Barracuda. Especially George Poteet's Blowfish:


http://www.memphisrodders.com/files/3e2f5bc5fc7c10a90f0a74afc8b80cfb-46.html

[Natalya]

https://www.youtube.com/watch?v=rFAYu4Sr6bI

At 8:50 you can see how flat the underbody of the new Honda // Acura NSX is. It doesn't need coroplast panels!!

[seifrob]

Originally Posted by freebeard

Cd -- It reminds me of A Series of Unfortunate Events.


http://currentconfig.com/2005/12/22/lemony-snickets-a-series-of-unfortunate-events/

Yes, it is Tatra 603 indeed!

[freebeard]

goawaygarage.blogspot.com


Oh, yeah.