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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 03-24-2012, 04:15 PM   #31 (permalink)
Master EcoModder
 
Join Date: Mar 2008
Location: USA
Posts: 560
Thanks: 1
Thanked 67 Times in 53 Posts
Best way to feed cooling air to the brakes, or for that new BMW side curtain vent, is ducting from the stagnation point at the nose, center.

The 2012 Prius deflector shown above is very crude. Coulda had a combined wheel fairing/duct that would have been much more efficient means of fairing the wheels, while simultaneously cooling the brakes.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 03-24-2012, 04:26 PM   #32 (permalink)
Master EcoModder
 
Join Date: Feb 2012
Location: Australia
Posts: 355

The Truck - '02 Nissan GU Patrol ST
Thanks: 5
Thanked 76 Times in 50 Posts
So then I assume the Subaru, being much the same is also crude and I should have no fears in attempting an improvement.
What do you think of the serated version on the Merc in this link?
News - Automotive Engineer
  Reply With Quote
Old 03-26-2012, 12:31 AM   #33 (permalink)
Master EcoModder
 
Join Date: Mar 2008
Location: USA
Posts: 560
Thanks: 1
Thanked 67 Times in 53 Posts
Quote:
Originally Posted by Tesla View Post
So then I assume the Subaru, being much the same is also crude and I should have no fears in attempting an improvement.
What do you think of the serated version on the Merc in this link?
News - Automotive Engineer
It would be easy to do a knockoff of the depicted Mercedes deflector, out of, say, a section of plastic paint pail with crenelated edge.

I wish they'd included all the streamlines in their drawing, especially showing the air at and immediately around the tire and front corner of the car. Some streamlines appear to originate at the tire leading edge, so they should show where that air came from. Is this a variant of the recent BMW air curtain idea, or what?

And, their computerized streamlines vary considerably from actual smoke streamlines as shown in Hucho's wind tunnel work on the Opel Calibra, which is much more acute oblique flow at the nose.

Best way to check, seems to me, is do your undertray, then tape tufts of yarn off it, wet the tufts with tempura paint, drive down the road at 70 mph, then look under the car and see which way the wind was blowing, from the paint deposits on the undertray. Then, orient your wheel fairings accordingly. Based on Hucho's photos, I suspect your streamlines will look more like Hucho's photo than the Mercedes drawings. In any event, the yarn tell tails will tell the tale.
  Reply With Quote
Old 03-26-2012, 02:54 AM   #34 (permalink)
PSmodder lurker
 
Join Date: Jan 2009
Location: Chino
Posts: 1,568
Thanks: 24
Thanked 861 Times in 496 Posts
Crenelated edges or tubercles, the finer details of these wind/fluid deflectors. With props from bio-mimicry.

http://www.otherpower.com/images/sci..._tubercles.pdf

Shaman Kayaks by Ventura Artist John Petersen

I always loved their taglines,"...million years of field tests" Whale-Inspired Wind Turbines - Technology Review

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Top 5 most fuel efficient tires (Lowest Rolling resistance: LRR) blackjackel General Efficiency Discussion 144 01-25-2016 11:39 PM
Discussion on tire efficiency Ernie Rogers General Efficiency Discussion 69 12-27-2014 01:17 PM
Bounce Test for Rolling Resistance? Ernie Rogers General Efficiency Discussion 14 05-25-2009 06:38 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com