German experimentation with low Cd automobiles in the 1930's

[basjoos]

In the mid to late 30's in Germany, there was a lot of work done in creating vehicles with a low Cd. The impetous for this was the building of the Autobahn, which provided a roadway that was capable of handling much higher speeds than the typical car/engine combinations available at the time could produce. They soon found that by reducing a car's drag, the existing engines could propel a car much faster down the Autobahn than it could could do in a traditionally shaped car body. Unfortunately this bout of automotive experimentation was shut down with the the start of WWII and most of the vehicles lost in the ensuing conflict. The following website (in Germen) shows a number of these cars (hit the "Tour" buttom at the bottom of each page to go to the next page). Its interesting to look at the state of the art back in the 1930's. There were some fairly wild looking designs.

http://www.design-classic-cars.de/jaray/kamm.html


1939 Maybach Stromlinienkarosserie

[newtonsfirstlaw]

It's sad that we have gone so far backwards since then! That car would have a drag coefficient very similar to yours if it had front skirts and a belly pan.

[basjoos]

It did have a belly pan (note the radiator air exhaust openings just in front of the door).

[MetroMPG]

Nice find, basjoos.

Note that you can use a service like Google to get an imperfect English translation of the text.

Try this link

[MetroMPG]

My favourite:

[Lazarus]

Check out the sink with hot and cold running water. Perfect for cleaning up after fueling.

[cfg83]

MetroMPG -

Originally Posted by MetroMPG

My favourite:

...

Oh yeah, that's my favorite too! Looks like it has a center mount for the driver :

pillbug.jpg

If only the VW Beetle had been offered in this design style. I would have called it the "pill-bug" :

pillbug01.jpg

CarloSW2

[basjoos]

That "pillbug" was a 7-passenger car with a single driver's seat in front between the front wheel wells followed by 2 rows of 3-abreast seating with an air-cooled in-line 4 engine in the back. It was a research vehicle built on the frame of a Mercedes-Benz 170H W28 by Professor Schlör at the Technical university of Gottingen in 1937 and was lost during WWII. But it looks like the guys at that website are working on building a reproduction of it on a MB 170 frame that they have.

Another website with pics of German streamlined cars:
http://home.claranet.de/fachreporte/stromlinie.htm

On those sites they mentioned the book: Stromlinienautos in Deutschland by Ralf J.F.Kieselbach. Sounds like an interesting read.

[aerohead]

Germany lost WW-I because of a shortage of fuel and rubber.Ultimately,Germany would also loose WW-II because of a shortage of fuel and rubber.In light of the glowing predictions of I.G.Farbenindustrie A.G.'s ability to produce synthetic fuel and rubber from Ruhr Valley coal,some who saw through the scam may have felt a technological imperative to allow the Fatherland to stretch out its limited resources in times of questionable bounty.Rommel weeped for the lack of gasoline which caused his defeat in North Africa and the end of his march towards the Suez,Persian Gulf,and Caspian Sea.The same streamlining may give us a little wiggle room as we negotiate $126/barrel oil.

[Cd]

What a fantastic article !
Thank you for posting this !

Very handsome cars.

[Cd]

Where can I find the .Cd of some of the cars in the article ? Does it say anything in the article about the .Cds of the cars ?

I only saw one .Cd figure.

[LUVMY02CREW]

I just glanced through that website real quickly just now. WOW!!!

Some of those vehicles were fantastic looking aesthetically and really seemed to be much more streamlined than some of today's rides....it's amazing to see where car design came from and where it is today.

[Otto]

Originally Posted by .Cd

Where can I find the .Cd of some of the cars in the article ? Does it say anything in the article about the .Cds of the cars ?

I only saw one .Cd figure.

The Sclor Pillbug car had a CD of 0.13, or about half of the best of today's production cars.

The process is simple: Using inverse methods, start with lofting lines the air is happy to follow, then work inward to design the vehicle accordingly.