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Old 10-15-2013, 02:13 PM   #151 (permalink)
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Always prefer to see Deutsch aero in action.


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Old 09-08-2014, 12:36 PM   #152 (permalink)
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Here is a new article with a brief video showing the Schlörwagen model in a wind tunnel, and some stills - including several I have not seen before:

Meet Germany's ultra-aerodynamic car from 1939 [w/video] - Autoblog

http://www.wired.com/2014/09/german-aerodynamic/





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Old 09-08-2014, 01:50 PM   #153 (permalink)
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As a former pilot (!) of hopped-up VW Type 1s, the multiplicity of compound curves creates significant lift (i.e., drag) in motion. An old Beetle at speeds over 80mph offers about as much excitement as one can tolerate. I have always wondered how much of the lift on these interwar streamliners could be tamed with a modern aerodynamic undertray. I have noted the Rosemeyer record car appears to have a rear diffuser (for all the good it did him).
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Old 09-08-2014, 07:04 PM   #154 (permalink)
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The Schlörwagen is very low drag. It was unstable in side winds (apparently), though that may have been partly because of the rear engine; but certainly it would probably need a fin on the back to reduce that effect.
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Old 09-09-2014, 02:35 PM   #155 (permalink)
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Quote:
Originally Posted by Eighty-Nine Si
As a former pilot (!) of hopped-up VW Type 1s, the multiplicity of compound curves creates significant lift (i.e., drag) in motion.
I just put 1800 miles on mine this weekend, and I never left the ground once. Of course it's stock except for the electronic ignition, maybe that's it.

You are correct: It's the multiplicity or complexity of the shape, not the compound-curvedness that is the problem. Basically the roof falls off far too rapidly, creating involving vortexes; and the nose high stock stance creates a positive angle of attack.

That's why the classic California look features a radical rake. Negative angle of attack, the tires are shrouded to lower the frontal area and, I believe, the rake pulls air off the lower sides into the underbody—counteracting the tendency for the air on the sides to be pulled upward by the too-fast roofline.

NeilBlanchard -- Thanks for the 3-view. That floorpan's a beauty. I take it those are lightening holes. Very dieselpunk.
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Old 09-09-2014, 03:30 PM   #156 (permalink)
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Once I got my Resto Custom Beetle's nose down it was very stable compared to the old nose high stance. Unfortunately I'm suffering from blown lifter bore-itis and haven't driven mine in almost 2 years. I'm jealous freebeard!
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Old 09-09-2014, 09:26 PM   #157 (permalink)
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New higher quality version of this picture:



A different print of this iconic shot:



Here's the actual pictures (as opposed to the screen captures I posted earlier):



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Old 09-09-2014, 10:51 PM   #158 (permalink)
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The [electric] flow-through ventilation in my Superbeetle is completely drowned by the operable vent windows. I wonder how the Schlörwagen is.
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Old 09-10-2014, 08:20 AM   #159 (permalink)
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The two windows either side of the windshield are operable, so if there was exhaust vents, the air flow would be vigorous.
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Old 09-10-2014, 08:41 AM   #160 (permalink)
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"Vigorous."

That's an understatement.

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