Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 08-15-2013, 10:24 AM   #11 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
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

__________________
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............

Last edited by kach22i; 08-15-2013 at 10:30 AM..
  Reply With Quote
The Following 2 Users Say Thank You to kach22i For This Useful Post:
aerohead (08-19-2013), bikeprof (09-29-2013)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 08-15-2013, 10:30 AM   #12 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
AutoSpeed - Aero Testing - Part 5


AutoSpeed - Aero Testing - Part 4

__________________
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............
  Reply With Quote
The Following 2 Users Say Thank You to kach22i For This Useful Post:
aerohead (08-19-2013), christofoo (08-15-2013)
Old 08-15-2013, 12:33 PM   #13 (permalink)
Cd
Ultimate Fail
 
Cd's Avatar
 
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,585
Thanks: 2,872
Thanked 1,121 Times in 679 Posts


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 :

  Reply With Quote
The Following 3 Users Say Thank You to Cd For This Useful Post:
aerohead (08-19-2013), MasterWong (12-30-2015), yoyoyoda (02-27-2014)
Old 08-16-2013, 09:34 AM   #14 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
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

Quote:
Wind tunnel testing the MINI Cooper John Cooper Works GP
__________________
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............
  Reply With Quote
The Following 2 Users Say Thank You to kach22i For This Useful Post:
aerohead (08-19-2013), Cd (08-19-2013)
Old 08-19-2013, 01:01 PM   #15 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
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.
__________________
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............
  Reply With Quote
The Following 3 Users Say Thank You to kach22i For This Useful Post:
aerohead (08-19-2013), Cd (08-19-2013), MasterWong (12-30-2015)
Old 08-19-2013, 01:18 PM   #16 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
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.
__________________
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............
  Reply With Quote
The Following 2 Users Say Thank You to kach22i For This Useful Post:
aerohead (08-19-2013), MasterWong (12-30-2015)
Old 08-19-2013, 07:54 PM   #17 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 16,314
Thanks: 24,440
Thanked 7,386 Times in 4,783 Posts
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.'
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
The Following User Says Thank You to aerohead For This Useful Post:
bikeprof (09-29-2013)
Old 08-19-2013, 08:47 PM   #18 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
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/
__________________
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............
  Reply With Quote
The Following 3 Users Say Thank You to kach22i For This Useful Post:
aerohead (08-21-2013), bikeprof (09-29-2013), MasterWong (12-30-2015)
Old 08-20-2013, 09:50 AM   #19 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,908

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,475
Thanked 2,952 Times in 1,845 Posts
__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
The Following 2 Users Say Thank You to NeilBlanchard For This Useful Post:
aerohead (08-21-2013), bikeprof (09-29-2013)
Old 08-20-2013, 12:03 PM   #20 (permalink)
Master EcoModder
 
kach22i's Avatar
 
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,187
Thanks: 132
Thanked 2,809 Times in 1,973 Posts
One from your own collection, thanks Neil.
Schlor Pillbug Photos by NeilBlanchard | Photobucket

Some more on that car.

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

__________________
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............
  Reply With Quote
The Following 2 Users Say Thank You to kach22i For This Useful Post:
aerohead (08-21-2013), NeilBlanchard (08-20-2013)
Reply  Post New Thread






Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com