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Old 08-15-2013, 09:24 AM   #11 (permalink)
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Quote:
Originally Posted by Cd View Post
.......post tuft tests here as well ?
By all means, the more perspective on the issues the better.

For me tufts seem less intuitive, requiring intense examination and analysis when compare to smoke which just seems to flow effortlessly.

Ignorance is bliss?

http://www.odec.ca/projects/2007/morg7r2/report.html

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Old 08-15-2013, 09:30 AM   #12 (permalink)
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AutoSpeed - Aero Testing - Part 5


AutoSpeed - Aero Testing - Part 4

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Old 08-15-2013, 11:33 AM   #13 (permalink)
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A smoke stream would make this car look sleek, but the telltale tufts show just how much of a mess the car is to the air :

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Old 08-16-2013, 08:34 AM   #14 (permalink)
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Quote:
Originally Posted by Cd View Post
A smoke stream would make this car look sleek, but the telltale tufts show just how much of a mess the car is to the air : [/IMG]
That's just gotta be a cross-wind test, at least I hope so.

New Gas Mileage Rules Will Reshape What Americans Drive: Aerodynamics And Weight
New Gas Mileage Rules Will Reshape What Americans Drive: Aerodynamics And Weight

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Wind tunnel testing the MINI Cooper John Cooper Works GP
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Old 08-19-2013, 12:01 PM   #15 (permalink)
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I assume this shape has been in a few wind tunnels before - so it qualifies.

Project Heinkel: Volkswagen - Origin of the world beating 'People's Car'

Quote:
One of Jaray's wind tunnel maquettes. This shape would form the basis of his car design patents.
streamliners and teardroppers | Hemmings Daily

Quote:
Up for consideration were a few million dollars’ worth of classic Benzes from the 1950s: a 1952 W194 300 SL race car, a 1954 W198 300 SL production car and a 1951 W188 300S coupe. The results were interesting. The race car weighed in with a drag coefficient of .376 (wind speed 80.77 MPH) the production 300 SL was a close second at .389 while the 300S had a drag coefficient of .670.


http://blog.hemmings.com/index.php/c...liners/page/2/

Quote:
* David Greenlees over at The Old Motor this week showed us an early approach to wind tunnel testing, using scales to measure the various forces on the car.
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Old 08-19-2013, 12:18 PM   #16 (permalink)
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Project Heinkel


http://www.starcs.se/classical_methods.aspx


Quote:
Tufts are typically suitable for showing large to medium size flow field structures, depending on size of the tufts relative to the model. The easy installation also makes it a useful "quick-and-dirty" tool. Unlike the sublimation methods, tufts stay constantly active and is therefore suitable for wide slow sweeps, studying for example the conditions for stall.
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Old 08-19-2013, 06:54 PM   #17 (permalink)
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Jaray model

This is the 'pumpkin seed' of which the Aerodynamic Streamlining Template is derived.Jaray derived his from a Cd 0.045 streamline body of revolution/airship form.Wolfgang Klemperer,who had his graduate degree in engineering in 1922 did the wind tunnel measurements for Jaray at the Zeppelin works of which they both worked.It measured Cd 0.13 in its 'best' edge configuration with wheels,on the 'ground.'
I used a Cd 0.04 body for the 'Template.'
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Old 08-19-2013, 07:47 PM   #18 (permalink)
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Quote:
Originally Posted by aerohead View Post
This is the 'pumpkin seed' of which the Aerodynamic Streamlining Template is derived.
I admit to getting a little excited when I first found the image today. I knew right away what it was, yet have never seen a photo of the model before.

More on it in Portuguese, use Google Chrome as your browser and it will translate it for you.
Maybach - Paul Jaray e a aerodināmica - Um olhar sobre as corridas
Photo Caption:
Quote:
"The ideal way Jaray applied to a body close to the ground" in 1920
ETH Library, History of Science Collection, Zurich, Switzerland
More random wind tunnel and tuft pictures.

Tatra T600 Tatraplan


Wind tunnel - Newton lab. - Tests, Certifications, Wind tunnel, Interlaboratory, Ballistic test, Helmet testing


http://deansgarage.com/2010/macminn%...-lemans-coupe/
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Old 08-20-2013, 08:50 AM   #19 (permalink)
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Old 08-20-2013, 11:03 AM   #20 (permalink)
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One from your own collection, thanks Neil.
Schlor Pillbug Photos by NeilBlanchard | Photobucket

Some more on that car.

: : PROTOTYP - PERSONEN. KRAFT. WAGEN. : :

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