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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 05-05-2008, 04:49 PM   #11 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 12,373
Thanks: 19,915
Thanked 6,202 Times in 3,826 Posts
Ranger rake

Quote:
Originally Posted by FX2.3 View Post
Looks like an edge but doubt it has much edge left.. and I plan to get rid of the flares..



So a level truck is best? no rake?

I might make an aerocap during the summer, looks simple enough..
I think Frank Lee is correct on this.I have an old HOT ROD Magazine article which deals with body rake,and older cars experienced a slight drag reduction when the nose was dropped slightly,if it was dropped a little more,it began to go back up.Ford may have already designed rake into the Ranger.Don't know.And short of having a wind-tunnel,it would take a lot of trial and error to isolate the ideal angle.

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

Other popular topics in this forum...

   
Old 05-05-2008, 05:21 PM   #12 (permalink)
Hermit
 
Join Date: Mar 2008
Location: The woods
Posts: 42

Aubergine - '94 Ford Ranger 4x4
90 day: 19.14 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Many trucks, like my Ranger, have some rake. My assumption had been that this was for load carrying, so the truck would level out rather than squat.

But, it's possible there is an aerodynamic benefit as well. Would that be different than the benefit of an air dam?
__________________
  Reply With Quote
Old 05-05-2008, 05:30 PM   #13 (permalink)
Master EcoModder
 
Join Date: Feb 2008
Location: belgium
Posts: 663

vectra a - '95 Opel Vectra GLS
90 day: 37.51 mpg (US)
Thanks: 14
Thanked 60 Times in 43 Posts
maybe a lip spoiler at the end of the cabin would help. a lot of hatchbacks and breaks have this. perhaps even a small kammback that attatches to the roofline and sides, and slighthly angles inward. it wouldn't compromise the looks or usefullness of the truckbed much but might do a lot for aero if done right.
__________________
aer·o·dy·nam·ics: the science of passing gass

*i can coast for miles and miles and miles*
  Reply With Quote
Old 05-05-2008, 06:03 PM   #14 (permalink)
Master EcoModder
 
Big Dave's Avatar
 
Join Date: Jan 2008
Location: Steppes of Central Indiana
Posts: 1,314

The Red Baron - '00 Ford F-350 XLT
90 day: 27.99 mpg (US)

Impala Phase Zero - '96 Chevrolet Impala SS
90 day: 21.03 mpg (US)
Thanks: 0
Thanked 183 Times in 124 Posts
How about a bed fairing like mine. You are talking MPG, not Bonneville.
__________________
2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Rubber Conveyor Belt Air Dam
  Reply With Quote
Old 05-06-2008, 12:14 AM   #15 (permalink)
Liberti
 
LostCause's Avatar
 
Join Date: Feb 2008
Location: California
Posts: 504

Thunderbird - '96 Ford Thunderbird
90 day: 27.75 mpg (US)
Thanks: 0
Thanked 7 Times in 7 Posts
Quote:
Originally Posted by Frank Lee View Post
Where did you find that info?

Aero articles I've seen indicate a slight nose-down attitude to be beneficial for Cd.
Most of my thoughts on aerodynamics first center around symmetric airfoils just because they are the "ideal," but you are right. Being a funky, cambered "airfoil," the ideal AoA will vary based on the specific car.

The lowest drag solution will be one where the car generates no lift (Cd,0). Ideally, I think that should be achieved by setting the car's incidence angle to zero and cancelling any lift with downforce (e.g. a venturi). Raking the car, as Tasdrouille said, increases frontal area.

In the real world, rake would probably be a more practical solution, but that Ranger seems a little excessive.

- LostCause
  Reply With Quote
Old 05-07-2008, 05:47 PM   #16 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 12,373
Thanks: 19,915
Thanked 6,202 Times in 3,826 Posts
Quote:
Originally Posted by nwbabybronco View Post
Many trucks, like my Ranger, have some rake. My assumption had been that this was for load carrying, so the truck would level out rather than squat.

But, it's possible there is an aerodynamic benefit as well. Would that be different than the benefit of an air dam?
An SAE paper I looked at this morning ( its old an from Fiat) had results from wind tunnel studies for scale models.Their take on airdams was that for a clean-bottomed vehicle an airdam could actually increase drag.For a dirty-bottomed vehicle they would probably help.Since the Ranger has a torture-chamber for an underside,my guess is that the airdam is for you.CAR and DRIVER's Pinto and Z-car projects both saw mpg improvements with airdams.They are an industry standard now for passenger cars. Corvette and Firebird Trans AM run very deep airdams,however,they are "bottom-breathers" with no grilles,and take in all their air from below the bumper.Try to get as much air around the Ranger as you can.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 05-07-2008, 09:04 PM   #17 (permalink)
Saving Those Greenbacks
 
FX2.3's Avatar
 
Join Date: Apr 2008
Location: UTA
Posts: 91

Snowy - '02 Ford Ranger XL
90 day: 23.29 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by aerohead View Post
An SAE paper I looked at this morning ( its old an from Fiat) had results from wind tunnel studies for scale models.Their take on airdams was that for a clean-bottomed vehicle an airdam could actually increase drag.For a dirty-bottomed vehicle they would probably help.Since the Ranger has a torture-chamber for an underside,my guess is that the airdam is for you.CAR and DRIVER's Pinto and Z-car projects both saw mpg improvements with airdams.They are an industry standard now for passenger cars. Corvette and Firebird Trans AM run very deep airdams,however,they are "bottom-breathers" with no grilles,and take in all their air from below the bumper.Try to get as much air around the Ranger as you can.
Thanks!
__________________
[/URL]
  Reply With Quote
Old 06-20-2008, 11:04 AM   #18 (permalink)
EcoModding Lurker
 
Join Date: Jun 2008
Location: Rural Georgia, USA
Posts: 26

2000FordRanger - '00 Ford Ranger
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by aerohead View Post
Since the Ranger has a torture-chamber for an underside,my guess is that the airdam is for you.
As another Ranger rider, I'd be interested in installing an airdam. However, this is the first I've even considered the idea, and I'd appreciate some pointers. Are we talking about a commercial product, and if so, where does one get one? If this is something I have to build, please direct me to needed information.

Lane
__________________
Lane Lester
1971 VW Super Beetle
  Reply With Quote
Old 06-20-2008, 12:58 PM   #19 (permalink)
Saving Those Greenbacks
 
FX2.3's Avatar
 
Join Date: Apr 2008
Location: UTA
Posts: 91

Snowy - '02 Ford Ranger XL
90 day: 23.29 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
custom..

http://www.homedepot.com/webapp/wcs/...ctId=100013884

cut and screw on.. I have the XL valance so I really dont mind drilling holes into it..



I also plan this weekend to make the side skirts from the same material.. and maybe a spoiler type thing..
__________________
[/URL]
  Reply With Quote
The Following User Says Thank You to FX2.3 For This Useful Post:
chineseredneck (08-27-2012)
Old 06-20-2008, 01:31 PM   #20 (permalink)
EcoModding Lurker
 
Join Date: Jun 2008
Location: Rural Georgia, USA
Posts: 26

2000FordRanger - '00 Ford Ranger
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by FX2.3 View Post
http://www.homedepot.com/webapp/wcs/...ctId=100013884

cut and screw on.. I have the XL valance so I really dont mind drilling holes into it..
The price is sure right for the material. And I have the XL valance as well, but I'm not sure where you put the strip. It looks like mine already has a dam... but I may be completely off base about what one is and where it goes.

Lane

__________________
Lane Lester
1971 VW Super Beetle
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
jeep aero mod ideas johnpr Aerodynamics 22 08-27-2008 07:45 PM
Aero ideas 101 Lazarus Aerodynamics 1 07-11-2008 05:14 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com