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Old 03-13-2019, 02:49 PM   #801 (permalink)
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A-Pillars

Sometimes this disturbance is limited to a region near the pillar,after which the flow recovers and re-attaches rearwards.It shows up best in tuft studies.

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Old 03-13-2019, 03:24 PM   #802 (permalink)
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Quote:
Originally Posted by COcyclist
I have been reading Julian Edgar’s book. He states that the counter-rotating vortices start at the A pillar. This view would seem to support that.
At least in the case of the VW Beetle, IMHO it's the C-pillar as that's the widest and tallest (max cross section).
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Old 03-13-2019, 04:02 PM   #803 (permalink)
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cross-section

Quote:
Originally Posted by freebeard View Post
At least in the case of the VW Beetle, IMHO it's the C-pillar as that's the widest and tallest (max cross section).
Yah-yah!
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Old 03-30-2019, 09:32 AM   #804 (permalink)
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https://www.facebook.com/pg/amzel.ltd/posts/


More ink wash images in the link.
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Old 03-30-2019, 12:10 PM   #805 (permalink)
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Not touching a Facebook link. What is it?
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Old 03-30-2019, 04:26 PM   #806 (permalink)
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Quote:
Originally Posted by freebeard View Post
Not touching a Facebook link. What is it?
As posted in the Mike Vetter and others thread....................

1981
Lola T600
https://en.wikipedia.org/wiki/Lola_T600

Quote:
The Lola T600 was a racing car introduced in 1981 by Lola Cars as a customer chassis. It was the first GT prototype race car to incorporate ground-effect tunnels for downforce. The revolutionary aerodynamic design of the T600 was widely imitated throughout the 1980s by International Motor Sports Association (IMSA) and Group C prototype cars.
The other views are detail close ups, not missing much.
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1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

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Rear Spoiler Pick Up Truck
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Old 03-30-2019, 06:53 PM   #807 (permalink)
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I don't see the resemblance to Permalink #804, but I remember it from this graphic about the 1967 Colani C-form:

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Old 03-31-2019, 10:10 AM   #808 (permalink)
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Quote:
Originally Posted by freebeard View Post
I don't see the resemblance to Permalink #804,..............
My bad, I grabbed the wrong car, posted more than one and mixed them up somehow.

The person's Facebook page is called "Amzel Ltd." and he worked on the Lola as well as the red ink wash car (Nimrod Aston Martin) apparently.

Posted on February 11, 2016
Amzel Ltd.
https://www.facebook.com/pg/amzel.ltd/posts/
Quote:
Part 1 - Nimrod Aston Martin

My first solo project in motorsport was the Aston Martin Nimrod Group C. I left Lola Cars to join Nimrod in 1982, with the concept of a Group C car with a full composite chassis having been growing in my mind for what seemed like years. Nimrod offered me the opportunity to make it real.

Here are some photos of the (very basic, by today's standards) wind-tunnel model which give an idea of the concept. Some pictures show the windscreen painted in. There were also side windows, which aren't painted, but which can be seen moulded in in some shots. Part of the rationale for the body shape was to eliminate the A-pillar, which, I felt, in a composite chassis, with no steel roll cage, would be a structural weak zone. I have some photos of the chassis, but very under-exposed. However, I may put them up here.

Another reason for the body shape was to clean the upper body airflow, and eliminate the cross-flow and separation I'd seen on other sportscars. I was pleased with the flo-viz that can be seen on the pictures. The little wind tunnel work we did (funding was tight) was done at MIRA, in the fixed-floor quarter-scale tunnel.

I and my design team (actually, I was the whole design team) were very ambitious. The gearbox was stock Hewland VG, but the bellhousing was a mix of cast magnesium and carbon fibre.

More later....
Quote:
More on the Nimrod aero. The gap between the basic body shape and the base of the rear half of the front fender "bubble", which is visible in some of these photos, is not poor model-making, it was there to vent the front wheelarches. My alternative to louvres.






EDIT:
I signed into Facebook to view more of this person's work, and more history and descriptions showed up. If you can get over what ever Facebook phobia or Mark Zuckerberg dislike you have it could be worth the effort. My issues with FB is that I feel drained after reading everyone's personal lives and attempts to intruded upon my own. I don't care to keep up, my old friends and family "interests" just don't line up with my own very often. The chatter in some of the vehicle or hobby pages can be good, but unless you are trying to buy or fix something it is of fleeting interest. And unlike a forum I have difficulties locating old posts or thread topics, and don't know how to pick up where I left off - very frustrating.

https://www.facebook.com/pg/amzel.ltd/posts/

Quote:
Another reason for the body shape was to clean the upper body airflow, and eliminate the cross-flow and separation I'd seen on other sportscars. I was pleased with the flo-viz that can be seen on the pictures. The little wind tunnel work we did (funding was tight) was done at MIRA, in the fixed-floor quarter-scale tunnel.
Red ink wash = Flo-viz
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1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html

Last edited by kach22i; 03-31-2019 at 10:55 AM..
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Old 03-31-2019, 12:34 PM   #809 (permalink)
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I like the Nimrod. A 4-passenger version would compare with the Volhart-Saggita front end.

Quote:
If you can get over what ever Facebook phobia or Mark Zuckerberg dislike you have it could be worth the effort.
I live without a credit car or cell phone, saying no to Facebook isn't any additional burden. I wish they didn't maintain the shadow profile on me. It's so they can connect the social graph of any Facebook peeps I might know. it's creepy and oppressive.

Google does the same thing with Ecomodder. The eight ads at the bottom of each page are watching me. [H]ttps://googleads.g.doubleclick.net/aclk?sa=etc.

I feel better about Google since Eric Schmidt ran for the door last December after the Human Trafficking EO.
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Old 03-31-2019, 04:20 PM   #810 (permalink)
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I'm no computer expert but for years I have been attempting to limit tracking cookies with Ccleaner (free). I run it just about after every session of going on the Internet. It takes a while to select out each of your favorite or trusted websites in the interface so it does not wipe out your log-in passwords and the like. However, once set up it obliterates everything else in it's path.

Some people do not like Ccleaner after trying it one time. They think they can skip the step of marking/moving their favorite sites and run it, and in the process losing all of their log-in's.

Caution before using, it is a powerful tool.

If not marked as a friend, it is a foe and will be wiped clean.

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George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html

Last edited by kach22i; 04-01-2019 at 09:20 PM..
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