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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-10-2008, 03:23 PM   #91 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,526

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.71 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 60.06 mpg (US)
Thanks: 4,078
Thanked 6,970 Times in 3,608 Posts
That work thing is getting in the way today - no progress, no updates on the Kammback. Tomorrow I'll be back at it.

I've never noticed the trip strips on the Beemer tail lights. I'll have to keep an eye open for that. I looked for a pic, and only found this one of the 6 series (dial-up users beware), which shows what certainly look like aero treatment on the side of the rear lenses that would promote flow separation:

http://www.zastavki.com/pictures/160...__000192_2.jpg

protoge2003: I'll be mounting it with a combination of brackets and screws (or bolts). It would be simpler to just build it directly onto the hatch, but I seem to have a habit of doing things the hard way.

__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-10-2008, 04:17 PM   #92 (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 61 Times in 44 Posts

toyota prius Cd 0.26

opel Insignia Cd 0.27

seems like a slight upward angle at the back is something to look into...
__________________
aerˇoˇdyˇnamˇics: the science of passing gass

*i can coast for miles and miles and miles*
  Reply With Quote
Old 07-10-2008, 05:04 PM   #93 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,526

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.71 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 60.06 mpg (US)
Thanks: 4,078
Thanked 6,970 Times in 3,608 Posts
I don't know for sure, but I'd guess those upward kicks are likely there to reduce rear lift, or to compensate for a less than optimal backlight angle (too steep, as is my guess on the Opel). The addition of a spoiler as we know changes the "effective" rear angle.

Rear lift isn't an issue for me because I don't drive anywhere near fast enough for it to be a problem.
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 07-11-2008, 12:54 PM   #94 (permalink)
EcoModding Apprentice
 
Join Date: Dec 2007
Location: Ventura, Ca
Posts: 112

Whoop's Wheels - '89 Honda Civic Wagovan
90 day: 39.09 mpg (US)
Thanks: 1
Thanked 9 Times in 7 Posts
I saw a Toyota minivan with one of those top carrier soft bags. They used the flat hooks and nylon straps to strap it to the door frame. It had 4 straps attached to the top of the back door and one strap to each side.

I think your shape and glass work look great.

Down the road, maybe you can put a sort of skylight piece of clear plexiglass or something, if looking out the rear view mirror becomes enough of an issue to worry about.
  Reply With Quote
Old 07-11-2008, 09:04 PM   #95 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,526

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.71 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 60.06 mpg (US)
Thanks: 4,078
Thanked 6,970 Times in 3,608 Posts
Update-o-rama...

I sturdified the structure by mostly enclosing the back end with more cardboard & tape and carefully peeled it off the car tonight. The "release agent" (tin foil) worked quite nicely.



All trussed up with cardboard to hold the shape for pulling it off the car & glassing in a lip & underneath








Showing the "release agent" - tin foil.

Spent time trimming the raw edges, added a glass & cardboard 90 degree lip to the trailing edge and worked on glassing the underside (until I ran out of glass cloth & applicator sponge brushes.

I was surprised to read today that Craig Vetter's latest motorcycle streamlining project is not going to be fiberglass construction. He's going with bulkheads/skeleton and a plastic skin. Composite construction is too expensive and difficult to ship is his reason.

I figure the total cost of the Kammback will come in around $100. Most of that will be resin & glass cloth. (I also didn't try very hard to find a cheap source for it - just picked it up at Canadian Tire.)
Attached Thumbnails
Click image for larger version

Name:	fabrication-removed-outside.jpg
Views:	1716
Size:	76.1 KB
ID:	1135   Click image for larger version

Name:	fabrication-removed-inside.jpg
Views:	1721
Size:	79.7 KB
ID:	1136   Click image for larger version

Name:	fabrication-release-foil.jpg
Views:	1757
Size:	76.8 KB
ID:	1137   Click image for larger version

Name:	fabrication-trussed-up.jpg
Views:	1745
Size:	66.3 KB
ID:	1138  
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
The Following User Says Thank You to MetroMPG For This Useful Post:
ECONORAM (12-22-2013)
Old 07-11-2008, 09:09 PM   #96 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,526

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.71 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 60.06 mpg (US)
Thanks: 4,078
Thanked 6,970 Times in 3,608 Posts
The car is apparently looking weird enough that I'm getting basjoos-caliber comments from random passers by:

- "Is that electric"?

Two people figured it out right off the bat though:

- "Aerodynamic modifications?"

One visitor to the next door neighbour's was really interested. We talked about Kamm, the ideal teardrop shape etc, before his wife called him to bring in the wine for dinner!
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 07-11-2008, 10:04 PM   #97 (permalink)
VIVA LA MPG RESISTANCE
 
Will's Avatar
 
Join Date: Mar 2008
Location: Brownsville, Tn
Posts: 328

Meat-roll - '97 Geo Metro
Team Metro
90 day: 55.4 mpg (US)

Wife's Brruik - '03 Buick Century
90 day: 30.84 mpg (US)

Blue Balt - '08 Chevrolet Cobalt XFE
Team Chevy
90 day: 38.19 mpg (US)
Thanks: 0
Thanked 3 Times in 3 Posts
Check this one out... I know this Metro is electric, but I love the chopped top.
Attached Thumbnails
Click image for larger version

Name:	P6250018.jpg
Views:	361
Size:	65.7 KB
ID:	1139  
  Reply With Quote
Old 07-11-2008, 10:07 PM   #98 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,526

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.71 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 60.06 mpg (US)
Thanks: 4,078
Thanked 6,970 Times in 3,608 Posts
Yeah, that one's a beauty. Lower Cd and A. It's been jawboned before:

http://ecomodder.com/forum/showthrea...ropped-90.html
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 07-11-2008, 10:16 PM   #99 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 530 Times in 356 Posts
Will -

Quote:
Originally Posted by Will View Post
Check this one out... I know this Metro is electric, but I love the chopped top.
I'd like to see someone do that to a Civic VX Hatchback, and Wala!, you'd have a 3rd Gen CRX!

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 07-11-2008, 10:24 PM   #100 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,526

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.71 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 60.06 mpg (US)
Thanks: 4,078
Thanked 6,970 Times in 3,608 Posts
I just realized I can now no longer carry my bike on the rear hatch rack. I hardly ever did in the first place, but there you go. Moral of the story: aerodynamics are bad. Buy an SUV.

__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Why I'm Choosing a Civic Over a Metro Wayneburg General Efficiency Discussion 43 03-02-2011 05:11 PM
Mullet's Metro Project Johnny Mullet EcoModding Central 302 02-06-2011 07:04 PM
Geo Metro XFI Convertible Project Finished Coyote X EcoModding Central 227 11-14-2009 10:31 PM
$10 Metro on Craigslist. Project car, anyone? MetroMPG The Lounge 6 08-31-2009 01:21 AM



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