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02-24-2019, 02:35 PM
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#2962 (permalink)
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Master EcoModder
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Quote:
Originally Posted by The Toecutter
Here is a car Luigi Colani built off of a Citroen 2CV way back in 1981, requiring 1.7L of fuel to go 100 km:
1981 Colani 2CV - Studios |
Fantastic link, perfect for a Sunday afternoon - thanks.
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George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
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02-24-2019, 06:38 PM
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#2963 (permalink)
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Car Design History, Concept cars, Automotive advertising, auto designers and design studios in general is a goldmine.
Reposting from this other thread:
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I was searching for something else and I found a thread from 2016 where a forum member, stealth, applied CFD modeling to the question. Here's the result:
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On the model that has 100mm of ground clearance, flat base, removing the inverted horn increased the drag from 5.4N to 5.9N, increase of almost 10%. The pictures shows that without the airflow that going through the horn and pushing up the wake, it allows the airflow from the top go down and push aside all of the other airflow.
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However what's interesting is that for the 30mm ground clearance, the drag values are near identical. I think this is because of the size of the horn and the low ground clearance makes for a rapid expansion of the airflow which has similar drag level to having a solid back end.
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It all depends on the size of the horn and the ground clearance but I think it can be used to reduce the drag if done correctly. In terms of the Cd accuracy, in terms of real world predictions, the software wouldn't be any good unless I can get some real world validation, but it's accurate and consistent for when comparing designs and their drag values.
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My interpretation is that the second picture has the flat transom and the third has the bell. It appears to add order to the lower part of the wake. And with +70mm of air moving, 10% less drag.
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I'm a fan of the exponential bell diffuser.
...and Luigi Colani.
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The Following User Says Thank You to freebeard For This Useful Post:
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02-24-2019, 11:06 PM
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#2964 (permalink)
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Master EcoModder
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Quote:
Originally Posted by freebeard
I'm a fan of the exponential bell diffuser.
...and Luigi Colani.
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And I'm a fan of the Alfa Romeo BAT cars that you linked above. The BAT7 had a Cd of 0.19!
I wish I knew how to properly shape fins like that for my GT6. |
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02-26-2019, 02:43 PM
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#2965 (permalink)
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Thalmaturge
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1951 Mercury Monterey George Barris custom
https://cleveland.craigslist.org/cto...819795242.html
Pics saved here for when the craigslist listing goes poof.
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The Following User Says Thank You to samwichse For This Useful Post:
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02-26-2019, 07:50 PM
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#2966 (permalink)
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Master EcoModder
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Gather 'round chillun's and hear the tale of Sam Barris...
https://kustomrama.com/wiki/Barris_Kustoms
https://kustomrama.com/wiki/Sam_Barris%27_1949_Mercury
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Sam's Mercury is one of the first, if not the first, chopped 1949 - 1950 Mercury, and it was built in the newer Barris shop on Atlantic. According to The Rodders Journal 29 the car was not the first chopped 1949 Mercury, since the Ayala Brothers were chopping Louie Bettancourt's 1949 Mercury at the same time, but Sam's Mercury was finished before Louie Bettancourt's Mercury.[1]
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https://kustomrama.com/wiki/Sam_Barris
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The Aztec was one of the last full custom projects Sam worked on. A Sam continued to do some custom work in Sacramento at Barris North. But Sam wanted out of the industry, and the El Capitola was the last full custom he completed in 1960. After completing the El Capitola Sam became an insurance investigator and the fire commissioner for Charmichael.
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https://en.wikipedia.org/wiki/George...to_customizer)
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Instead, Barris decided the Futura was a perfect base on which to create the Batmobile. Barris hired custom builder Gene Cushenberry to modify the car, which was ready in three weeks.
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So Sam did the lead sled Mercs (including the Hirohita Mercury) and George did the Munsters coach. Also:
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1951 Mercury Monterey Custom Built By George Barris. Originally built in 1956. Has since been recustomized 5 times.
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Hirohita Merc, El Capitola and The Aztec. 
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
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The Following User Says Thank You to freebeard For This Useful Post:
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02-26-2019, 09:16 PM
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#2967 (permalink)
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Master EcoModder
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__________________
George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
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The Following 2 Users Say Thank You to kach22i For This Useful Post:
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03-02-2019, 01:10 PM
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#2969 (permalink)
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Master EcoModder
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I like the Bosley except for the side window sill line.
__________________
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
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.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
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03-06-2019, 11:59 AM
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#2970 (permalink)
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Master EcoModder
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proper shape
Quote:
Originally Posted by The Toecutter
And I'm a fan of the Alfa Romeo BAT cars that you linked above. The BAT7 had a Cd of 0.19!
I wish I knew how to properly shape fins like that for my GT6.
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For a couple hundred-thousand dollars we could find out.
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