Go Back   EcoModder Forum > AltModding > Alternative Transportation
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-28-2007, 09:49 PM   #1 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,652

Blackfly - '98 Geo Metro
Team Metro
90 day: 70.72 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 47.99 mpg (US)
Thanks: 2,136
Thanked 4,895 Times in 2,460 Posts
How my home-built bicycle trailer lowers my MPG

(Originally written Nov. 06)

Just posted a new page at metrompg about...

How the cargo trailer I made for my beater 10-speed bike is hurting my MPG:



(130+ lbs: moving two Metro/Firefly transmissions by bicycle.)

Of course, total fuel used is the most important consideration, but since I typically get better mileage in sub/urban driving than I do on the highway, every time I use the bicycle for a local trip, my proportion of highway mileage for a given tank increases, so my overall mileage drops.

Other than for avoiding crappy weather, the main reason I use the car for local trips used to be to transport something too heavy/awkward for the beater 10-speed to handle.

But with the cargo trailer, I don't need the car for that any more.

So the MPG suffers. (I was going to calculate a figure, but, nah...)

On the plus side, kids seem to love seeing me hauling stuff behind the bike. It's kind of fun hearing them shout "cool! Where did you get THAT?" when I go by.

http://www.metrompg.com/posts/bike-trailer.htm

__________________
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
The Following User Says Thank You to MetroMPG For This Useful Post:
Sven7 (05-27-2013)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 11-28-2007, 09:50 PM   #2 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,652

Blackfly - '98 Geo Metro
Team Metro
90 day: 70.72 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 47.99 mpg (US)
Thanks: 2,136
Thanked 4,895 Times in 2,460 Posts
People always ask how it's connected to the bike...

Same thing as my brother's kiddie trailer - a stout spring, the ends held in steel tube. If you click into the article on metrompg.com, there's a zoom in pic that shows the hinge close up.

There are also some ball-joint type hinges you can make out of (apparently) common inexpensive hardware store parts. See this site for examples:

Community Bike Cart Design - A simple, homemade, low-cost bike cart for car independence and community

EDIT:
the cost of my trailer was an afternoon & about $23. Plus I got exactly the size & shape I wanted.
__________________
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
Old 11-28-2007, 09:51 PM   #3 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,652

Blackfly - '98 Geo Metro
Team Metro
90 day: 70.72 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 47.99 mpg (US)
Thanks: 2,136
Thanked 4,895 Times in 2,460 Posts
A safety note about construction...

If you're going to weld/braze zinc-coated EMT conduit for the frame, best to do it outside with a breeze (or fan)

The fumes of the heated zinc can cause "metal fever".

The thing has turned out to be remarkably useful. I never used to be worried about my beater bike getting stolen, but now that it has half the trailer hinge permanently attached to the rear axle, I sometimes worry about losing it.
__________________
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
Old 11-28-2007, 09:52 PM   #4 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,652

Blackfly - '98 Geo Metro
Team Metro
90 day: 70.72 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 47.99 mpg (US)
Thanks: 2,136
Thanked 4,895 Times in 2,460 Posts
Just to clarify, yes, my MPG is actually worse now.

Because of the trailer, I use less fuel overall, true (and that's the important fact).

But by omitting some local driving (where I can achieve my highest MPG figures), my driving is further biased towards highway use. As a result of the higher proportion of (lower MPG) highway driving, my calculated MPG for a given tank is lower than it would have otherwise been had I just driven the car locally instead of using the bike/trailer.
__________________
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
Old 11-28-2007, 09:54 PM   #5 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,652

Blackfly - '98 Geo Metro
Team Metro
90 day: 70.72 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 47.99 mpg (US)
Thanks: 2,136
Thanked 4,895 Times in 2,460 Posts


These are neat too.

2 downsides I can see, based on my limited experience:

- heavy loads will directly affect the bike's balance, since there's no torsional "give" at the hinge in the "roll" axis;

- related to that - if you lay the bike down, you could spill the trailer contents, since it has to lay down with the bike. So you'd either need a kick stand, or something to lean the bike against when you park

Small points, but there you go.
__________________
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
Old 12-14-2007, 01:53 PM   #6 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,652

Blackfly - '98 Geo Metro
Team Metro
90 day: 70.72 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 47.99 mpg (US)
Thanks: 2,136
Thanked 4,895 Times in 2,460 Posts
Quote:
Originally Posted by igo
I WILL be making one of these. I have some spare 26" wheels They might be tall but will do the job.
Cool! Check that bike cart design website. I think some of the designs use a larger wheel, but they offset the platform so it's not at axle height.
__________________
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
Old 12-14-2007, 02:36 PM   #7 (permalink)
Awesomeness personified
 
AndrewJ's Avatar
 
Join Date: Dec 2007
Location: Columbia, MO
Posts: 642

Harold - '94 Honda Civic CX
90 day: 54.51 mpg (US)

Margot - '08 Surly Big Dummy
Thanks: 0
Thanked 27 Times in 17 Posts
Send a message via AIM to AndrewJ
Bikes at Work sells just their trailer hitch, but it's $50, and if you can weld you can probably make the same thing for about $12

Anyway they also have a cool bike-trailer calculator that shows you how much you can supposedly carry (in lbs.) on a bike trailer.

And there's even a pic of someone hauling 1000 lbs of cargo on three trailers with one bicycle. I think they used to have a video of the 1000lb haul, but I can't find it anymore.

__________________
"I got 350 heads on a 305 engine. I get 10 miles to the gallon. I ain't got no good intentions." - The Drive By Truckers.

  Reply With Quote
Old 12-14-2007, 02:37 PM   #8 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,652

Blackfly - '98 Geo Metro
Team Metro
90 day: 70.72 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 47.99 mpg (US)
Thanks: 2,136
Thanked 4,895 Times in 2,460 Posts
Awesome pic.

I'd think if you were doing 1000 lb hauls, you'd want to be pulling with a trike! Either that, or be a pro at trackstanding.
__________________
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
Old 12-14-2007, 02:43 PM   #9 (permalink)
Awesomeness personified
 
AndrewJ's Avatar
 
Join Date: Dec 2007
Location: Columbia, MO
Posts: 642

Harold - '94 Honda Civic CX
90 day: 54.51 mpg (US)

Margot - '08 Surly Big Dummy
Thanks: 0
Thanked 27 Times in 17 Posts
Send a message via AIM to AndrewJ
forget trackstands, I think the key would be NEVER coming to a stop.
__________________
"I got 350 heads on a 305 engine. I get 10 miles to the gallon. I ain't got no good intentions." - The Drive By Truckers.

  Reply With Quote
Old 11-14-2011, 11:57 AM   #10 (permalink)
aero guerrilla
 
Piwoslaw's Avatar
 
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,495

Svietlana - '05 Peugeot 307 SW
Diesel
90 day: 54.1 mpg (US)

Theodor - '01 Peugeot 106
90 day: 46.17 mpg (US)
Thanks: 1,005
Thanked 600 Times in 376 Posts
Darin, if you tell me you had no part in this, I won't believe you!


__________________
e·co·mod·ding: the art of turning vehicles into what they should be

What matters is where you're going, not how fast.

"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell

Piwoslaw's Peugeot 307sw modding thread


  Reply With Quote
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