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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-08-2013, 08:47 PM   #11 (permalink)
Master EcoModder
 
Join Date: Aug 2013
Location: Richmond, VA
Posts: 447

Valerie - '03 Honda Civic DX
Team Honda
90 day: 55.79 mpg (US)
Thanks: 277
Thanked 231 Times in 105 Posts
I'll be the first to admit that it isn't the best design, but it should be effective. I think there is still room for improvement, but it's a good start!

__________________

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-09-2013, 12:35 AM   #12 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 20,902
Thanks: 5,852
Thanked 6,825 Times in 5,521 Posts
I'd say the design is pretty good, but not the materials. What you have there is a pattern for something that will take the weather.

I took spacemanspif's word for it that you had used coroplast. Do you have any of that?

The rod looks about right for gauge/weight. With coroplast you could slip the rod through the flutes. If you V-notch the ends of the flutes along the curved edge the rod forming the edge could be let in and the edge wrapped with strapping tape or something. You could hollow out the coroplast enough to slip metal washers in between the skins.

If you left maybe four of the nuts and washers off, would it still stay attached?
  Reply With Quote
Old 11-10-2013, 07:18 PM   #13 (permalink)
Master EcoModder
 
skyking's Avatar
 
Join Date: Apr 2011
Location: Tacoma WA
Posts: 1,368

Woody - '96 Dodge Ram 2500 SLT
Team Cummins
90 day: 23.82 mpg (US)

Avion and Woody - '96 Dodge/Avion Ram 2500/5th wheel combo
90 day: 15.1 mpg (US)

TD eye eye eye - '03 Volkswagen Beetle GLS
90 day: 49.05 mpg (US)

Mule - '07 Dodge Ram 3500 ST
Thanks: 723
Thanked 503 Times in 328 Posts
It's coroplast.
You have me looking at the beetle now. Thanks I think
__________________




2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle

currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears
  Reply With Quote
Old 11-12-2013, 11:08 AM   #14 (permalink)
Master EcoModder
 
Join Date: Aug 2013
Location: Richmond, VA
Posts: 447

Valerie - '03 Honda Civic DX
Team Honda
90 day: 55.79 mpg (US)
Thanks: 277
Thanked 231 Times in 105 Posts
Quote:
Originally Posted by freebeard View Post
I'd say the design is pretty good, but not the materials. What you have there is a pattern for something that will take the weather.

I took spacemanspif's word for it that you had used coroplast. Do you have any of that?

The rod looks about right for gauge/weight. With coroplast you could slip the rod through the flutes. If you V-notch the ends of the flutes along the curved edge the rod forming the edge could be let in and the edge wrapped with strapping tape or something. You could hollow out the coroplast enough to slip metal washers in between the skins.

If you left maybe four of the nuts and washers off, would it still stay attached?
The amount of attachment points are not to keep it on the car but to keep the edges from flexing out into the air stream. It's to keep the edges of the coroplast fixed against the edges of the fender. So, yes it would stay attached to the car, but it would allow much more air to get into the wheelwell.

A few questions:
Are you saying that I should put the metal rods inside the coroplast?
What do you mean by "V-notch"?
Why would I want the metal washers inside the coroplast vs. where they are on the outside?
__________________

  Reply With Quote
Old 11-12-2013, 05:00 PM   #15 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 20,902
Thanks: 5,852
Thanked 6,825 Times in 5,521 Posts
In answer; yes, and it's worth a picture—let me get back to you.

I guess it is coroplast. I thought it looked like corrugated cardboard. Was it spray painted? I guesss the next step up would be Alumacorr.

EDIT: Will this do for now?


From the upper left, raw coroplast, V-notched so the wire or rod will stay centered (a flat-bottomed notch won't do that), and the V-notch recessed so the material can be rolled over the edge. The middle one could be used with a taped edge (packing tape or metal tape), But the recessed version could be rolled outside to insde over inside to outside and you'd have double thickness of the material on the edge and lots of area for gluing.

As for the washer, you could roll the wire around the edge of the washer and solder or epoxy it. then gouge out a cavity in the flutes and when the wire is threaded through it will pull the washer in with it. If nothing else, it's less parts to lose alongside the road on a dark and rainy night.

Last edited by freebeard; 11-12-2013 at 06:11 PM..
  Reply With Quote
Old 11-13-2013, 03:06 PM   #16 (permalink)
EcoModding Apprentice
 
Join Date: Oct 2010
Location: Corvallis, OR
Posts: 142

Cinco The Miata - '90 Mazda Miata
Team Mazda
Sports Cars
90 day: 36.13 mpg (US)

Oscar Wilde - '02 Honda Metropolitan
Motorcycle
90 day: 94.9 mpg (US)
Thanks: 17
Thanked 27 Times in 20 Posts
Did you screw your attachment points into your wheel arches?
__________________
  Reply With Quote
Old 12-26-2013, 10:43 PM   #17 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,297

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,373
Thanked 2,155 Times in 1,463 Posts
Watching your new tuft tests on your other thread today really shows how effective these are... in those vids the air remains attached behind the rear wheel well. Nice. Thanks.

__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



  Reply With Quote
Reply  Post New Thread


Thread Tools




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