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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 06-03-2014, 06:04 PM   #11 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,922
Thanks: 24,011
Thanked 7,230 Times in 4,656 Posts
skirts

Quote:
Originally Posted by NoD~ View Post
Something I have been thinking about: What if you shaped proper all the wheel skirts to essentially "replace" the need for smooth wheel covers?

The reason I'm considering this idea: I have aluminum wheels that are very light weight (Rota Slipstreams) but FAR from aerodynamic. Doing smooth wheel covers would likely require drilling/screwing into the aluminum spokes, which isn't something I want to do. Instead, doing all 4 wheels skirts that would extend in the middle low enough to cover the wheel.

One benefit to this that I can easily see, though miniscule, is reduced rotational mass. 4 "pizza pans" and some screws adds up to something. There is also wheel balancing to consider as part of that equation.

Any thoughts on the matter?
Before I graduated college I did a one day aero session with the Dodge pickup.I covered all the wheel openings with cardboard and masking tape and was able to put a couple hundred miles on it to look at the tank mileage.
I ran in to no difficulties.
You might just cobble something up and test it first to see what kind of results you get.If you like the numbers,then you can decide.
As Darin says,CAD (cardboard and duct tape) design.

__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 06-04-2014, 09:10 AM   #12 (permalink)
Master EcoModder
 
NoD~'s Avatar
 
Join Date: Sep 2011
Location: USA
Posts: 469

Frogger - '00 Honda Insight Gas Only (unHybrid)
90 day: 68.51 mpg (US)
Thanks: 13
Thanked 247 Times in 133 Posts
I'm familiar with cardboard/duct tape!



I've got a lot of projects on my plate, but when I get time, I suspect some testing to happen. I threw on these short ones in a hurry, but I plan on doing some braces ones that sit much lower, probably with corrugated plastic.
  Reply With Quote
The Following User Says Thank You to NoD~ For This Useful Post:
aerohead (06-04-2014)
Old 06-04-2014, 09:27 AM   #13 (permalink)
Master EcoModder
 
cowmeat's Avatar
 
Join Date: Jan 2014
Location: South Carolina
Posts: 1,659

Princess Carriage - '20 Ford Explorer Limited

Silver - '22 Ford Maverick Hybrid XLT w/tow pkg
Maverick Hybrids
90 day: 41.3 mpg (US)
Thanks: 128
Thanked 764 Times in 461 Posts
I haven't noticed a big gain in MPG from the wheel skirts, but I have definitely gained in funny looks from other drivers.
People either love it or hate it, but pretty much everybody has something to say about my car one way or the other. The wheel skirts are pretty much the ice-breakers, because everybody I know has commented on them.
Once I explain the gas mileage I'm currently getting with my mods, a lot of haters suddenly fall in love with it.
__________________

  Reply With Quote
The Following 2 Users Say Thank You to cowmeat For This Useful Post:
aerohead (06-04-2014), The donkey CRX (06-04-2014)
Old 06-18-2014, 11:55 AM   #14 (permalink)
Mechanical engineer
 
Vekke's Avatar
 
Join Date: Jan 2009
Location: Kitee (Finland)
Posts: 1,250

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: 261
Thanked 816 Times in 400 Posts
I will have 1000 ziptie plugs ready at the end of august. Those will be plastic injected and the price for 20 pcs will be in this first batch 25€ or 34us dollars including shipping in letter.

They will fit to 10mm drill size hole and will work with 4.8mm wide zipties more details will follow...
__________________


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

Vesa Tiainen innovation engineer and automotive enthusiast
  Reply With Quote
The Following 5 Users Say Thank You to Vekke For This Useful Post:
aerohead (06-18-2014), BamZipPow (06-20-2014), California98Civic (06-18-2014), chumly (06-18-2014), NeilBlanchard (06-18-2014)
Old 06-18-2014, 12:36 PM   #15 (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
I think that with good wheel skirts, the benefits of smooth wheel covers goes way down. The thing that might be better than smooth covers (under skirts) is to have sealed wheels? Anything moving that can accelerate air is going to add some drag. The Edison@ wheels are examples of this:

This is a different issue than air passing by the wheel opening. Once the wheel well is closed off (except where the wheel protrudes, naturally), it becomes essentially a fan/impeller churning the air in there; so having no openings or protrusions on the wheel is the next issue to solve, after wheel skirts are installed.
__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
Old 06-18-2014, 05:06 PM   #16 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,922
Thanks: 24,011
Thanked 7,230 Times in 4,656 Posts
sealed wheels

Quote:
Originally Posted by NeilBlanchard View Post
I think that with good wheel skirts, the benefits of smooth wheel covers goes way down. The thing that might be better than smooth covers (under skirts) is to have sealed wheels? Anything moving that can accelerate air is going to add some drag. The Edison@ wheels are examples of this:

This is a different issue than air passing by the wheel opening. Once the wheel well is closed off (except where the wheel protrudes, naturally), it becomes essentially a fan/impeller churning the air in there; so having no openings or protrusions on the wheel is the next issue to solve, after wheel skirts are installed.
Here,Bochum University uses 'sealed' wheels under the skirts.With Cd 0.137,their doing something right.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
The Following User Says Thank You to aerohead For This Useful Post:
NeilBlanchard (06-18-2014)
Old 06-19-2014, 08:50 PM   #17 (permalink)
Not banned yet
 
deejaaa's Avatar
 
Join Date: May 2010
Location: Texas Coast, close to Houston
Posts: 907

Blue - '03 Chevy S-10, LS
Thanks: 423
Thanked 265 Times in 212 Posts
Quote:
Originally Posted by skyking View Post
.......there are ways to mount a cover to a wheel without drilling or modification too. Clips, springs, etc.
even with aluminum rims?
__________________
2003 S-10, 2.2L, 5 speed, ext cab long bed.
So far: DRL delete, remove bed mount toolbox.
  Reply With Quote
Old 06-21-2014, 02:29 PM   #18 (permalink)
Mechanical engineer
 
Vekke's Avatar
 
Join Date: Jan 2009
Location: Kitee (Finland)
Posts: 1,250

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: 261
Thanked 816 Times in 400 Posts
Many ways to install and one of them is the ziptie plug which I originally designed just for that purpose:



That is old video but the product will be same with more functions, better looks and so on.

__________________


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

Vesa Tiainen innovation engineer and automotive enthusiast

Last edited by Vekke; 06-21-2014 at 02:47 PM..
  Reply With Quote
The Following User Says Thank You to Vekke For This Useful Post:
aerohead (06-21-2014)
Old 07-02-2014, 10:11 PM   #19 (permalink)
Tinkerer
 
kafer65's Avatar
 
Join Date: Apr 2008
Location: Tennessee
Posts: 284

Silver - '15 Mazda CX-5 Sport
Team Mazda
90 day: 37.23 mpg (US)
Thanks: 7
Thanked 63 Times in 54 Posts
I just ziptied acrylic disks on all sides of my Mazda CX-5. I cut them out with tin shears so you can see the wheels through them. Just looped them around the spokes and used two holes on the disk. I did the upper grill with a thin clear sheet like Vekke shows in one of his videos. Wife approves My instant mpg reads 3 mpg improvement when I'm climbing medium hills at around 50mph. I'm averaging 39 plus mpg in mixed suburban city and pulse glide engine on. I'm still learning how to drive this versus the tdi to find the best way to deal with hills.

  Reply With Quote
The Following User Says Thank You to kafer65 For This Useful Post:
aerohead (07-07-2014)
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