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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 03-05-2017, 11:56 PM   #1 (permalink)
EcoModding Apprentice
 
Join Date: Oct 2010
Location: Ivins UT
Posts: 180

the green machine :P - '97 Jeep Grand Cherokee ZJ
90 day: 20.92 mpg (US)

Thee s10 - '00 Chevy S10
Thanks: 2
Thanked 21 Times in 19 Posts
Using cloth+epoxy for aerodynamics!!

I'm planning on using some cheap bed sheets to make a aero camper shell for my s10 and a aerodynamic belly pan by pulling a plastic sheet tight under the truck, then pull the sheets tight over that and coat the whole thing with a few layers of epoxy to stiffen it up!! That way its removable and also doesn't wave in the wind reducing aerodynamics!!


Last edited by stovie; 03-06-2017 at 09:27 AM..
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 03-06-2017, 02:38 AM   #2 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 7,304
Thanks: 1,500
Thanked 2,455 Times in 1,915 Posts
How many layers of bed sheets? How will it be removable?

You might stretch the sheets, then add twine or yarn that you can pull tight to pre-tension it. Then add the epoxy.
  Reply With Quote
Old 03-06-2017, 04:28 AM   #3 (permalink)
Master EcoModder
 
Join Date: Sep 2012
Location: Victoria, BC
Posts: 322

Topoff - '92 Geo Metro LSi
90 day: 48.54 mpg (US)

'91 Miata - '91 Mazda Miata
90 day: 24.7 mpg (US)

'86 Fiero GT - '86 Pontiac Fiero GT

Purple Penny Pincher - '95 Pontiac Firefly Base
90 day: 38.91 mpg (US)

Jett-Black - '01 Volkswagen Jetta
90 day: 39.02 mpg (US)
Thanks: 19
Thanked 98 Times in 71 Posts
I'd suggest a fabric with a bit of stretch to it, if you want to avoid wrinkles.

And, maybe make it upside-down, because gravity will make it concave if you do it the right way up. I suppose some air pressure on the inside would make it convex as well.
__________________
  Reply With Quote
Old 03-06-2017, 09:33 AM   #4 (permalink)
EcoModding Apprentice
 
Join Date: Oct 2010
Location: Ivins UT
Posts: 180

the green machine :P - '97 Jeep Grand Cherokee ZJ
90 day: 20.92 mpg (US)

Thee s10 - '00 Chevy S10
Thanks: 2
Thanked 21 Times in 19 Posts
I'm planning on doing 2-3 layers, and using tarp clamps to pull the sheets as tight as I can. The first one I'm planning on making is the belly pan so I'll see about getting some pics of my setup when I do it. The belly of my s10 is pretty straight so I don't think I have to worry about the angle of the sheets too much.
  Reply With Quote
The Following User Says Thank You to stovie For This Useful Post:
freebeard (03-06-2017)
Old 03-06-2017, 01:46 PM   #5 (permalink)
Rat Racer
 
Fat Charlie's Avatar
 
Join Date: May 2011
Location: Route 16
Posts: 2,768

Al the Third, year four - '13 Honda Fit Base
Team Honda
90 day: 40.91 mpg (US)
Thanks: 863
Thanked 1,005 Times in 656 Posts
I'm looking forward to seeing this.
__________________

Quote:
Originally Posted by sheepdog44 View Post
Transmission type Efficiency
Manual neutral engine off.100% @MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%

  Reply With Quote
Old 03-06-2017, 04:34 PM   #6 (permalink)
Master EcoModder
 
Join Date: Feb 2010
Location: Elmira, NY
Posts: 1,278
Thanks: 162
Thanked 206 Times in 179 Posts
I use 1" hex mesh wire fencing bonded between 5 mil plastic tarp material with contact cement. No mixing needed and plenty cheap.
  Reply With Quote
Old 03-07-2017, 01:40 AM   #7 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 7,304
Thanks: 1,500
Thanked 2,455 Times in 1,915 Posts
I'd like to see an example of that. If you slump-molded the three layers into a compound curve and then turn it over, how much weight would it be able to take?
  Reply With Quote
Old 03-10-2017, 08:01 PM   #8 (permalink)
Master EcoModder
 
Join Date: Feb 2010
Location: Elmira, NY
Posts: 1,278
Thanks: 162
Thanked 206 Times in 179 Posts
The mesh is easily formed by hand and I use plastic tubing for ribs.

Last edited by Grant-53; 03-10-2017 at 08:09 PM..
  Reply With Quote
The Following 2 Users Say Thank You to Grant-53 For This Useful Post:
aerohead (03-18-2017), freebeard (03-11-2017)
Old 03-11-2017, 03:26 AM   #9 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 7,304
Thanks: 1,500
Thanked 2,455 Times in 1,915 Posts
Polypropylene or polyethylene? How would you characterize the strength? Do you think two layers of wire mesh would be any improvement?

With polyethylene it might be possible to fuse the layers with a heat gun and dispense with the contact cement.
  Reply With Quote
Old 03-11-2017, 12:01 PM   #10 (permalink)
Master EcoModder
 
Join Date: Feb 2010
Location: Elmira, NY
Posts: 1,278
Thanks: 162
Thanked 206 Times in 179 Posts
I tried multiple layers but didn't get good adhesion. For thicker wire go for wider spacing. Not sure of plastic as I used scrap covering plywood for shipment. Check the tarps at the farm stores. I roll a spare tire over the layers to get best results.

  Reply With Quote
The Following User Says Thank You to Grant-53 For This Useful Post:
freebeard (03-11-2017)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com