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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 04-19-2015, 03:37 AM   #1 (permalink)
EcoModding Lurker
 
Join Date: Apr 2015
Location: Slovakia
Posts: 64
Thanks: 9
Thanked 40 Times in 30 Posts
Thumbs up eco runner team delft (Cd 0.0512 BEST) Create Car With Lowest Ever Drag Coefficient

eco runner team delft (Cd 0.0512 BEST) Create Car With Lowest Ever Drag Coefficient

INFO Chief aerodynamics engineer Joost Dorscheidt tests the Ecorunner V... News Photo | Getty Images

1


2

  Reply With Quote
The Following 4 Users Say Thank You to slipknotsv For This Useful Post:
aerohead (04-20-2015), BabyDiesel (04-20-2015), Cd (04-19-2015), spacemanspif (04-19-2015)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 04-19-2015, 07:49 AM   #2 (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
So if this little cigar was scaled up to the size of a traditional car ( with a height of 50" to the roof ) how much would the Cd increase ?
Obviously ( duh ! ) the CdXA would increase, but what about just the Cd.

Also, if i remember correctly, the top speed of the car is something like 15 mph.
How would the drag change if driven at traditional speeds ( both at this scale, and when brought up to traditional size )

Aerohead, you got yer ears on there good buddy ?
  Reply With Quote
Old 04-19-2015, 08:52 AM   #3 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,907

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 2,950 Times in 1,844 Posts
Scale does not affect the Cd, and neither does speed - up to ~250MPH.
__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
The Following 2 Users Say Thank You to NeilBlanchard For This Useful Post:
aerohead (04-20-2015), Cd (04-19-2015)
Old 04-20-2015, 11:20 AM   #4 (permalink)
Mechanical engineer
 
Vekke's Avatar
 
Join Date: Jan 2009
Location: Kitee (Finland)
Posts: 1,244

Siitin - '98 Seat Cordoba Vario
90 day: 58.56 mpg (US)

VW Lupo 3L --> 2L - '00 VolksWagen Lupo 3L
Diesel
90 day: 104.94 mpg (US)

A8 luxury fuel sipper - '97 Audi A8 1.2 TDI 6 speed manual
90 day: 64.64 mpg (US)

Audi A4B6 Avant Niistäjä - '02 Audi A4b6 1.9tdi 96kW 3L
90 day: 54.57 mpg (US)

Tourekki - '04 VW Touareg 2.5TDI R5 6 speed manual
90 day: 32.98 mpg (US)

A2 1.4TDI - '03 Audi A2 1.4 TDI
90 day: 45.68 mpg (US)

A2 1.4 LPG - '02 Audi A2 1.4 (75hp)
90 day: 24.67 mpg (US)
Thanks: 259
Thanked 803 Times in 391 Posts
When you scale that up what about tires that need to be wider which is the biggest source of drag in that kind of slipstreamed vehicles?
__________________


https://www.linkedin.com/in/vesatiainen/

Vesa Tiainen innovation engineer and automotive enthusiast
  Reply With Quote
Old 04-20-2015, 01:49 PM   #5 (permalink)
Master EcoModder
 
Join Date: Feb 2014
Location: Missoula, MT
Posts: 2,652

Dark Egg - '12 VW Touraeg
Thanks: 300
Thanked 1,176 Times in 806 Posts
Do the tires have to be wider? Dragsters go over 300 mph on what look like 70's Honda motorcycle tires.
  Reply With Quote
Old 04-20-2015, 02:44 PM   #6 (permalink)
gil
EcoModding Lurker
 
gil's Avatar
 
Join Date: Aug 2008
Location: Watsonville, CA
Posts: 67

The Drift - '85 Toyota Corolla GTS
90 day: 28.26 mpg (US)

!Rally - '02 Subaru Impreza WRX
90 day: 27.68 mpg (US)

Cinnamon - '13 Honda PCX 150
90 day: 75.86 mpg (US)
Thanks: 62
Thanked 11 Times in 8 Posts
The BMW i3 has tall narrow tires. Since its a light car a narrow tire suits its traction needs, and it doesn't sacrifice on style .

Bridgestone Releases Details on the BMW i3 Tires | Inside EVs

Gil
  Reply With Quote
Old 04-20-2015, 06:50 PM   #7 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,861
Thanks: 23,922
Thanked 7,207 Times in 4,640 Posts
tires

Quote:
Originally Posted by Vekke View Post
When you scale that up what about tires that need to be wider which is the biggest source of drag in that kind of slipstreamed vehicles?
This would an area of weakest available data.And I wish these teams would test for 'real' cars and publish the data.
The 1957 MG EX 181 is of the few cars with 'real' cars measured.With it's limited wheel fairings it was reported at Cd 0.12.

You can see what happens to the VW flow body when wheels are added.Although fairings would bring that Cd 0.14 down.

__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
The Following User Says Thank You to aerohead For This Useful Post:
BamZipPow (04-20-2015)
Reply  Post New Thread


Thread Tools




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