11-24-2021, 02:44 PM
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#31 (permalink)
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' K-car'
Some will relate the term to the 5-car series developed at FKFS between 1930 and 1941, next door to Daimler Benz.
The 'K' stands for both Professor, Wunnibald I. 'Kamm', who created the FKFS, and Baron Rinehard 'Koenig'-Fachsenfeld, who traded his aerodynamic patents to the German government, in exchange for free use of the FKFS and it's wind tunnel.
The aerodynamic term 'Kamm-back' is a reference to the K-form, of which was the intellectual property of Fachsenfeld.
Germany had lost WW-I, in part, due to running out of oil and rubber.
Adolf Hitler was very interested in stretching Germany's fuel supplies, until he could capture North Africa, the Middle East, Ploesti Romania, and the Soviet's Caspian Sea petroleum. The lower-drag, aerodynamic capabilities of the K-form factored into that calculus as a bridge technology.
It didn't work out very well, and they ended up losing WW-II in part, because of lack of oil and rubber.
You may have seen photographs of GM's Opel Russelsheim factory storage area, full of brand new Blitz Trucks, with wooden wheels, awaiting rubber from I.G. Farben, who's synthetic fuel and rubber factories were ultimately bombed into oblivion by Allied air forces.
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Last edited by aerohead; 11-24-2021 at 02:47 PM..
Reason: add data
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11-24-2021, 06:29 PM
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#32 (permalink)
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Contemporaneous with Kamm and Fachenfeld was Breers.
FWD five-cylinder radial FWD.
https://freebeard.imgur.com/all/
That coulda been the real Pentastar in the 1930s..
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11-24-2021, 08:40 PM
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#33 (permalink)
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It's all about Diesel
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Quote:
Originally Posted by freebeard
FWD five-cylinder radial FWD
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I don't know why it makes me lurk about attempting to fit a 7-cyl Rotec into a VW Gol or Saveiro... 
But anyway, most likely a FWD radial into some Beetle-ish model wouldn't be so critical to overheating, as all the cylinders would be exposed in a more even way to the air flow. |
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11-30-2021, 12:42 PM
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#34 (permalink)
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Carl Breer
https://ecomodder.com/forum/showthre...1-a-13538.htmlRight on!
His 1934, DeSoto Airflow aerodynamic test mule sported a pure Kamm-back, in truncated form. With the suite of aero mods they used, this K- form Airflow came in at Cd 0.268, compared to Cd 0.51.
Adding the stinger dropped it down to Cd 0.244 ( SPIRIT with the mirrors deleted ).
Bottom of #1 permalink, bottom of chart on left.
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Last edited by aerohead; 11-30-2021 at 06:11 PM..
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11-30-2021, 01:43 PM
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#35 (permalink)
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__________________
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
________________
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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