Electric Bikes


22
Jun 2012
by larry

Why I Invented an Electric Bike for Carrying Adult Passengers

Thea and JJ model the passenger bike prototype.

“On June 4, 1896 in a tiny workshop behind his home on 58 Bagley Street, [Henry] Ford put the finishing touches on his pure ethanol-powered motor car. After more than two years of experimentation, Ford, at the age of 32, had completed his first experimental automobile…The two cylinder engine could produce 4 horsepower…achieving a top speed of 20 mph (32 km/h). Ford would later go on to found the Ford Motor Company and become one of the world’s richest men.”
Wikipedia

I’m gradually reducing my car dependance. I enjoy traveling to meetings, hauling groceries, and taking my kids to their dental appointments all on my bike. But one of the few remaining compelling reasons for using my car is to carry adult passengers. For a variety of reasons my adult friends and family do not feel comfortable hopping onto my longtail cargo bike. Can bicycles ever fulfill the role of carrying adult passengers? I believe they can, and (like Henry Ford) I’ve built an experimental vehicle to test my conviction.

Here are the design goals I began with: build a bike that can safely and comfortably carry both a 200-pound driver and a 200-pound passenger at an average speed of Continue reading →


22
Apr 2012
by don

Shawn’s Electric Yuba Mundo

 

The author giving his touring bike a break

Today’s article comes from a guest contributor, Shawn McCarty of Venice, Florida. Shawn is an avid cyclist who has completed bike tours through various parts of the United States and Europe. His blog (aworldspinning.com) has some nice photos of his European adventure. And his custom electric cargo bike is amazing!

If you have biking facts, photos, or a story you think our readers would enjoy, let us know. We’re interested in presenting a variety of topics and points of view as we build our biking community.

Continue reading →


30
Mar 2012
by larry

Costs and Planning for a Car-Lite Family of Four

No Virtue Required: Car-Lite Family Transportation Is Less Expensive, Faster, and More Flexible than Car-Encumbered Transportation

In his recent post, my co-blogger Don writes about “the virtue in choosing the right [transportation] tool for the job”. I realized that my own family makes regular use of five, count ‘em FIVE transportation options: walking; bicycling; busing; driving various CarShare and rental vehicles; and (in dwindling amounts) driving my wife’s tiny red Mini. Yesterday epitomized our highly flexible family transportation: we criss-crossed Ithaca together and separately and then at the end of the day we all landed together on our couch like the opening sequence of a Simpson’s episode.

Continue reading →

5
Mar 2012
by mark

Hauling couches by bike

Couches are fun to haul by bike.

couch by bike.

Workcycles bakfiets, pictured above, is not particularly well-suited for the task, as the couch is much too large to fix in the box. That didn’t stop it from being fun to make it work, anyway.

The best choice for hauling couches to use a Bikes-at-Work trailer, as seen in the photos below.

Couch hunting: riverside break

Couch weight varies greatly. The one above had lots of metal guts to allow the seats to recline, plus it was water-logged for being outside. Simple couch designs can be relatively light, with a lot of the volume being in cushions.

new bikes-at-work trailer

I try to keep my total cargo weight not much above 200, so that the handling remains safe. It will be tempting to give friends rides on couches that you might be carrying, but this most likely quickly put you over that weight limit. That’s why the experience above didn’t last much longer than it took to take the photo. On some cargo hauling trips, I have carried a bathroom scale with me to check how much things weigh, to avoid exceeding safe limits. With practice I could get a sense of how cargo weights were adding up as the trailer was being loaded.

The lowest-effort arrangement for hauling couches by bike is to pair the Bikes-at-Work trailer with electric assist. With that arrangement, I’ve been able to haul couch and loveseat pairs without strain.

another alley couch and loveseat liberated.

Hauling a couch and loveseat to the dump..


3
Mar 2012
by mark

Electric Yuba Mundo as school bus

Here’s a great little video about one dad who uses an electric Yuba Mundo as a “school bus” to take his two kids to school:

I’ve used my own electric Yuba Mundo to take two children to school before as well:

Missed the bus.

More about that experience is my previous posted called Missed the Bus.


1
Mar 2012
by mark

Big Dummy vs Yuba Mundo vs Bakfiets

Cargo bikes are increasingly viable as car-replacement vehicles, but there are some significant differences between the options to choose from. The Surly Big Dummy is lighter, while Workcycle’s bakfiets puts kids front and center with a large box for cargo up front. Yuba’s elMundo is one way to add electric assist to the equation.

I have not had my own car for a decade. Instead my family replaces a second car with a number of bikes and other gear. Our bikes include WorkCycles bakfiets, an electric Yuba Mundo and a Surly Big Dummy. Here’s how they compare with each other based on our experiece riding each as part of our regular routines.

The basic details about each are readily available online, and won’t be repeated here, although the photos below will give you a sense of each.

Bakfiets

100 mile radius potluck at the park

Electric Yuba Mundo

Electric Yuba Mundo with Bikes-at-Work trailer

Big Dummy

First ride with my new custom Big Dummy. More to come...

Continue reading →

9
Dec 2011
by larry

Currently in the Clarkberg Bike Stable


Here’s a little photo essay about my family’s bicycles. I’m proud to say that we use our bikes a lot. Each bike is tailored to its user: I drive a cargo bike capable of carrying passengers and cargo long distances; my wife drives a slower and lighter but more stylish bike; my 11-year-old daughter Thea and her friend JJ drive bikes tailored to their 2-mile drive to school. (My son Jasper, aged 15, resists having a bike. He pretty much walks wherever he needs to go.) Ithaca is hilly, so it’s important for a utility bike to have an electric motor. I’ve spent a lot of time over the last couple of years  experimenting with electric bike motors and other accessories. Maybe you can benefit from my discoveries.

Continue reading →

4
Oct 2011
by larry

Aqua-Xtracycle, the Amphibious Bicycle

boating mode: the boat carries the bike

boating mode: the boat carries the bike

biking mode: the bike carries the boat

biking mode: the bike carries the boat

The Aqua-Xtracycle is a do-it-yourself amphibious electric cargo bike. This video shows how it works, and the photo gallery below shows a bit of our development process. In a future post I’ll describe how you can make your own Aqua-Xtracycle.

Continue reading →

14
Sep 2011
by don

Electric cargo bike, made in China

If you have been following my blog about electric cargo bikes for a while, you know that I often make predictions about where the market for these bikes will go.  Over time, many of my predictions have come to pass, but usually later or on a smaller scale than I had anticipated.  For example, I wrote this almost a year ago:

I know what cargo biking will look like when it enters the mainstream, and I bet you do, too.  We’ll see stores like Wal-Mart and Costco selling electric cargo bikes for about half the price of today’s models.  They will be made in China, and probably designed there as well.  When that day comes, I won’t know whether to cheer or cry…

That was one of my most audacious predictions, and one that I didn’t expect to happen any time soon.  But let’s check where we are one year later.  Available at Wal-Mart?  Yes, but not electric cargo bikes, just electric bikes in their traditional form, priced between $400 and $800.  Still, an electric bike for $400?  That’s just unbelievable.  Or maybe crazy – the bike has mixed reviews from customers on Amazon.

ODK Utility Bicycle

But as far as I can tell it’s not manufactured in China, and surely not designed there, so that part of my vision hasn’t arrived yet.

Or has it?

Continue reading →

19
Aug 2011
by larry

My DIY SLA Trip Batteries


Test drive to Sheldrake Point

Test drive to Sheldrake Point

Caution: shop talk blog post intended for do-it-yourselfers. For my recent 240-mile journey I created what I call my “trip batteries”—batteries that I can attach to my bike to augment my regular batteries, but that I don’t intend to carry around on a daily basis. As such, the main design criteria for these batteries is that they be inexpensive. I don’t want to pay the big bucks for a battery that I only use once in a while. The obvious choice is SLA (sealed lead acid) batteries. These are the same kind of batteries used in cars, and the technology is almost 100 years old. E-bikers out there may poo-poo this choice of battery. After all, compared to my lithium batteries, my SLA batteries are heavy (20lbs vs. the lithium’s 15lbs), not quite as powerful (600wh vs. the lithium’s 720wh), don’t last as long (300 charge cycles vs. the lithium’s 1,500) and they are dumb (that is, they don’t have a battery management circuit board in them to prevent human error from damaging them, although most controllers provide the necessary protections). But they are cheap. I can put together a 10ah 36v battery for about $120 versus a 10ah 36v battery for $600.

Continue reading →