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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-27-2009, 10:12 PM   #21 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,294

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

MPGiata - '90 Mazda Miata
90 day: 52.8 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 73.57 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.53 mpg (US)
Thanks: 3,065
Thanked 5,946 Times in 3,080 Posts
Quote:
Originally Posted by brucey View Post


Also visible in the pictures: I chose to leave the corner lights exposed for this. I figured it'd be minimal loss overall, save the problem of forming a tight seal of the car, and I'd get to have extra indicators. Which wouldnt be a bad thing.
I think that's really important, actually.

At night, the trailer lights being close together may send the wrong visual cues to drivers behind you: lights close together are what we're used to seeing on vehicles that are far away. You don't want to potentially contribute to that kind of mis-perception.

basjoos was struck from behind on the highway by a speeding car at night in his Aerocivic, and it's my opinion the close-together taillights may have been a factor. (See his thread - he's since added more conspicuous lighting to give the car more illuminated "width".)

I'll be incorporating conspicuous marker lights on my boat tail in the same position as your OEM lights for that reason.

Other than that... glad to see someone else forging ahead with this kind of project!

__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



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 10-28-2009, 01:24 AM   #22 (permalink)
A madman
 
brucey's Avatar
 
Join Date: Mar 2008
Location: WV
Posts: 1,012

Pequod - '17 Subaru Outback
90 day: 22.79 mpg (US)
Thanks: 70
Thanked 179 Times in 96 Posts
Send a message via AIM to brucey
Christ: Could you do a picture? I was thinking of having a zip tie like device on the outside of the door. That way I could attach it one handed and it wouldnt go anywhere, but still disconnect it when need be.
  Reply With Quote
Old 10-28-2009, 02:38 AM   #23 (permalink)
EcoModding Lurker
 
Join Date: Apr 2008
Location: Lancaster, Pa
Posts: 27

Little crown - '03 Toyota Corolla CE w/ S body kit
90 day: 40.75 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
why wouldn't you connect it to the roof rack?
__________________
  Reply With Quote
Old 10-28-2009, 02:43 AM   #24 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
Quote:
Originally Posted by brucey View Post
Christ: Could you do a picture? I was thinking of having a zip tie like device on the outside of the door. That way I could attach it one handed and it wouldnt go anywhere, but still disconnect it when need be.
______________________|

The | should be facing down, but you'll understand from that, I hope.

You fasten the _____________ to the structure or frame, so that when the thing is installed to the hitch, you can just slightly deform the frame enough to tuck the | into the gap between the hatch and the rest of the body.

Just like a normal L bracket, basically.
__________________
"ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 10-28-2009, 03:01 AM   #25 (permalink)
A madman
 
brucey's Avatar
 
Join Date: Mar 2008
Location: WV
Posts: 1,012

Pequod - '17 Subaru Outback
90 day: 22.79 mpg (US)
Thanks: 70
Thanked 179 Times in 96 Posts
Send a message via AIM to brucey
That could work, but I was wanting a pretty solid mount. As in no front to back, left to right, up to down, side to side motion at all. That would only do 2 of the requirements :/ I'm thinking a pipe in a pipe (basically how a hitch connects) with another 'hitch pin' to have a 3 pronged hitch, basically. Except have the other 2 somewhere else on the car.

Maybe on the bumper for that fast and furious look when the tail isnt on? </sarcasm>
  Reply With Quote
Old 10-28-2009, 03:04 AM   #26 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
You could also use those on the sides, to help with side/side mvmt, as long as the hatch seam is on the side of the vehicle.

Simple and (probably) effective. I hope. If not, well, you didn't really waste anything, since straps of aluminum are pretty cheap, and can be used for other things if you don't like the way it works out!
__________________
"ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 10-28-2009, 01:32 PM   #27 (permalink)
Master EcoModder
 
wagonman76's Avatar
 
Join Date: Jun 2008
Location: Northwest Lower Michigan
Posts: 1,006

Red Car - '89 Chevrolet Celebrity CL 4 door
Team Chevy
90 day: 36.47 mpg (US)

Winter Wagon - '89 Pontiac 6000 LE Wagon
90 day: 28.26 mpg (US)
Thanks: 8
Thanked 17 Times in 16 Posts
Nice work!

On mine I came off the steel bumper with a support frame (serves a similar purpose as your trailer hitch). But that alone is just a support for the weight. I clamped rods (with vinyl tubing over them) across the trunk lid to actually keep the thing in one place. It is strong, you can push on it and it solidly moves the whole car around.

I left my existing sidemarkers exposed, you can just see them directly from the rear. Also you can see the factory taillights through the window if you are up high enough.

One thing I did notice when I put that extension on the tail (which had the taillights closer together) is that a lot of people wouldn't get into their own lane when passing. I thought perhaps it was because my car might have appeared narrower. But then again, you're supposed to go fully into the other lane when passing, regardless of vehicle width. You don't crowd a motorcyclist out of his own lane just because he has a narrow vehicle.
__________________

Winter daily driver, parked most days right now


Summer daily driver
  Reply With Quote
Old 10-28-2009, 08:45 PM   #28 (permalink)
A madman
 
brucey's Avatar
 
Join Date: Mar 2008
Location: WV
Posts: 1,012

Pequod - '17 Subaru Outback
90 day: 22.79 mpg (US)
Thanks: 70
Thanked 179 Times in 96 Posts
Send a message via AIM to brucey
I'm going to try to use the license plate screw holes later tonight to thread a rod through it and have a slip on cover on the center 2X4 frame board. It should work and it isnt under too much stress so I dont think it will be a problem.

The only thing I dont like about that is I'll have to put it on and off everytime I put the tail on. Originally my plan was to have a duplicate plate on the tail full time to avoid the hassle.
  Reply With Quote
Old 10-29-2009, 10:23 AM   #29 (permalink)
A madman
 
brucey's Avatar
 
Join Date: Mar 2008
Location: WV
Posts: 1,012

Pequod - '17 Subaru Outback
90 day: 22.79 mpg (US)
Thanks: 70
Thanked 179 Times in 96 Posts
Send a message via AIM to brucey
Ugly ugly ugly system that works amazing:



The metal simply wedges into the seam of the rear hatch.

I could almost stand on the very end of the tail and not worry about it and not worry about it. I'm going to have to do something about the hitch mount too. but for right now I want to get it road worthy and then I'll worry about cleaning the air on the bottom. (Less worried about it there since the back of my car isn't exactly smooth with the lack of underbelly panelling and hitch hanging off the frame already)

BUT! I do have a fairly smooth front and middle:



Screw those belly pans that are gonna get dented. Give me 1/4 inch thick 6061 aluminum.
  Reply With Quote
Old 10-29-2009, 12:35 PM   #30 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
Quote:
Originally Posted by brucey View Post
Ugly ugly ugly system that works amazing:



The metal simply wedges into the seam of the rear hatch.

I could almost stand on the very end of the tail and not worry about it and not worry about it. I'm going to have to do something about the hitch mount too. but for right now I want to get it road worthy and then I'll worry about cleaning the air on the bottom. (Less worried about it there since the back of my car isn't exactly smooth with the lack of underbelly panelling and hitch hanging off the frame already)

BUT! I do have a fairly smooth front and middle:



Screw those belly pans that are gonna get dented. Give me 1/4 inch thick 6061 aluminum.
Go offroad much?!

__________________
"ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Vibe Kammback / Boat tail trikkonceptz Aerodynamics 9 01-19-2014 10:59 AM
Project: Geo Metro boat tail prototype - 15% MPG improvement @ 90 kph / 56 mph MetroMPG Aerodynamics 500 05-10-2012 11:30 PM
Trailer Hitch Boat Tail? superchow EcoModding Central 16 04-26-2010 03:35 PM
Subaru Outback Prototype Boat Tail Test Results brucey Aerodynamics 10 10-02-2009 06:03 PM
Rear Wheel Boat Tail Fabrication 2003protege Aerodynamics 1 07-24-2008 06:16 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