Wednesday, February 11, 2009

Introducing Robotrak: The Remote Control Tractor


Robotrak has a new home! And what, or whom, you ask, is Robotrak? Well let me tell you. It's a short story and it begins thusly....

First, the earth cooled... OK, OK, I'll skip that part.

So, on to the story at hand... It starts with the snow:



Where I live, on a small island off the wet coast of BC, precariously close to the 2010 winter scams, we usually get 6 inches of wet snow tops. When It snows our precariously (yes i like that word) steep driveway becomes a luge track. A luge track without banked turns.

Normally, with our old 6" snows we could get by driving the driveway with chains and shovelling the worst parts. This would last for a few days, a week tops. Our driveway is about 1000 feet long, winding down from the main road, across the creek at the bottom, past our house and up the other side of the valley about another 500 feet up to my parent's house

Recent years has brought more and more snow and not the wet variety. This year we got 12" then another 12", then when we thought it was all over we got another 12" followed by another 6". Then it started to rain and rain and rain and rain then it froze. You get the picture. Shovelling roofs, digging out the Previa from behind 4 foot snow walls, etc. You know, a nice light Ontario winter, in BC. Now we are in siege mode. We have to hike in, uphill both ways carrying our provisions on our backs.

We have no plow, or any other large scale method of moving snow. Remember, this is Vancouver, where a snow blower is someone who does a lot of coke.

In a moment of desperation we fitted my parent's 4WD Tercell with chains on all four wheels and started down the hill from my parent's into 22" of wet snow. One giant snow wedge later, the Tercell was stuck with it's wheels hanging limp at it's sides. FAIL! On to plan B. Wait, there is no plan B? We need a plan B.

I started looking for a snow blower, hoping to find a solution to our little problem but everyone was sold out and craigslist was full of people trying to cash in selling junk for way too much money. "Wait, here's one in Chelan... where the hell is Chelan?"

On one of my searches I came upon a vintage Elec-Trak with a snow blower attachment and I knew I had found my plan B. Problem was it was in Vermont. Much searching came up empty until I tried the Vancouver Electric Vehicle Association. I had seen an Elec-Trak at the last VEVA show and had been impressed with the solidity, size and weight of these buggers. Made in the late sixties to the early eighties by General Electric, they have six deep cycle batteries stowed away giving about 4 acres of mowing power! The gentleman showing his Elec-Track was very helpful and complimentary about my Auranthetics. This was in the summer of 08.

I sent out my request on the VEVA email list and I got a reply from a Dave Kohen, who turned out to be the same guy who was at the show. He had an Elec-Trak that was looking for a new home...but there was one problem: It was remote control. Wha? Wait, this is a problem...how? The ET was converted to remote control by another member, an electrical engineer, naturally, who liked to mow his lawn from his porch. He even had a video camera hooked up so he could mow from indoors in inclement weather. The member had moved to a condo so he had no more lawn to mow. Alas, the video attachment is no longer with the vehicle but it's still all there. AND IT'S ORANGE! It was obviously meant to be.

I went to look at it at Dave's place. Dave has several Elec-Traks and some super cool projects like a micro hydro power plant and a suspension bridge. We negotiated a deal and I anxiously awaited delivery of the Robotrak.  About a week later it arrived

So I fabricated a plow, and bought a vintage snow blower attachment... from Nebraska... That's another story though. I've made a new battery box, an auxiliary power pack and installed a set of heated, yes heated Volvo seats I had sitting in storage.

Robotrak is fitting in nicely in her new home as a multi task mower, plower, driveway maintainer, log skidder, trailer tower and general electric doitall.

This is Robotrak in happier times and warmer climes with it's previous owner.



This is the shot of the new battery box. (note the joystick control and lack of steering wheel)


And here it is carrying it's first commercial delivery of glass. The plow has a crazy carpet attached to act as a low friction surface for better plowing.


Wednesday, January 14, 2009

Do It With Electrons Not Hydrocarbons


This is how it's done.  A little unassuming vintage car converted to electric stomps on corvettes and big block hot rods.




Tuesday, September 30, 2008

The Money Shot

Finally had a chance to shoot the bikes together.  Thanks to a good friend who volunteered her garden and her time to help. 
Thanks, Alison

Monday, September 1, 2008

Aerodynamic flow simulations (aero nerd heaven)

Dream mod for my Previa is a boat tail.  I prepared a few videos to see if the flow works out.  This is from a free program called Flow Illustrator.





The flow is the most stable on the boat tail version and wake and mixing are the smallest.

 



This view shows a deflector wing and belly pan.  Too much mixing and unstable wake behind the wing.




Here is the stock simulation.  Note the turbulent mixing under the van as well as the wavy, unstable large wake.

My next major project for the Previa will be an under belly pan. 

Don'tcha just love the interwebs?

Sunday, August 24, 2008

Our Neighbour


This is our resident barred owl.  Not terribly concerned about humans apparently. She can be seen afternoons and evenings in the spring and summer perched near one of the ponds waiting for salamanders to surface.  Sometimes you can hear her young fuzzy ones hissing hungily, deeper in the woods.  The behbehs are harder to spot and very difficult to photograph.  There are usually two behbehs waiting for their poor overworked mom to feed them.  Often the mother is set upon by chipping birds who dive at her on her perch, sometimes literally colliding with her in a vain attempt to scare her away. Squawking crows then often join in on the harassment. If she swoops down and catches something, the crows will chase her and try to steal her prey. The crows and chipping birds often alert us of the owl's presence.

One evening I heard an awful desperate squawking which abruptly ended after a few seconds. It was disturbing because I was not able to identify what creature was making the sounds. On Katie's walk that evening we discovered the grizzly explanation. Exactly centred between the two large hollow cedar stumps that straddle the driveway, near the bridge, we came across a freshly severed crow's head. Well, the beak and half the head, still wet with scarlet blood droplets.
I guess she had had enough.  We have not heard the crows squawking after her since.

Creeeepy.

Monday, August 11, 2008

The Roadrunner

My honey on a practice run with me following (and filming) on my bike.

Friday, August 8, 2008

What the largest automobile manufacturer in the world can't do on the ground...





What's this? No suit, No tie? No multi billion dollar Corporation?
And no flight suit either.

Thursday, August 7, 2008

Q: How Many Dolts Does It Take To Screw Up A Volt ?

A: General Motors

The General Motors guide to making an electric car that won't sell.

1: Make it UGLY
2: Make people wait way too long so they get bored of it.
3: Make videos of it driving 2mph in a cul-de-sac and call that promotion.
4: Sell the battery technology that got the EV1-genII a range of 150 miles. Then claim that there is no battery available to use in the Volt.
5: Use negative suggestion in your advertising "Don't forget to recharge the car" 
6: Don't sell it, lease it.
7: Wait for gas prices to drop, then don't make it some more.

Wednesday, August 6, 2008

Too Much Fun

Riding a lot this summer now that Arturo has the right gearing.  I now have an 8 tooth front sprocket and a 60 tooth rear. The new Scott 2 hp motor runs at a higher rpm now that it's got 24v coursing through it's copper veins. That tiny sprocket sure is noisy though.  It's super torquey and accelerates like mad.  I get stopped at least once every trip by people fascinated by it.  

My honey has been taking Stella to work regularly and loving it. She found it a little terrifying at first but was determined to ride.  Now she's hooked.  When we go out together we turn more heads than a Ferrari on fire.  It takes some getting used to. Being the focus of a car full of screaming, pointing kids is not something I had ever imagined.

Thursday, July 3, 2008

The Economist's opinion on electric vehicles: WRONG!



Perhaps The Economist should check it's math.

In the Economist's opinion this electric vehicle:


and less like this gas powered vehicle




A friend who is also interested in electric cars told me about a special report on the future of energy in the "venerable" Economist magazine.  I scoffed, and told him that I wouldn't trust anything written in that or any mainstream media about electric cars.

I got a chance to peruse that article yesterday and was unpleasantly unsurprised by the opinion piece which acts as an introduction to the special report. "Battery-powered cars, meanwhile, are slightly comic: more like milk-floats than Maseratis."  
The section of the article on electric vehicles was actually quite accurate but it seems from this quote that the anonymous author-bot did not actually read It's own article or any thing about current electric vehicles. Hilarious because the Tesla (which is mentioned in the report) runs circles around any Maserati you might care to bring on. Apparently The Economist does not have a high opinion of itself.

By the way,
Maserati: 19.2mpg  0-60: 5.6 seconds
Tesla:     200mpg*  0-60: 3.2 seconds
Milk float: 300qpm** 0-60: never

*calculated from kwh
**quarts per mile