Shenzhen Victpower Technology Co., Ltd.
One word. A123.
Archive for June, 2012
I’ve been dying to bend this thing around some twisties. Great runs. Here’s a bit of video:
For some godforsaken reason Craigslist makes it really difficult to do a broad search of the entire country, or multiple regions of the country. There are some search engines that will require some modified security settings in your browser that I’ve tried, but don’t really cut it. Search All Junk, though, uses Google Custom Search to hit “Craigslist, Recycler, Penny Saver, Oodle and more!”
Here it is… hours and hours of internetz fun! Search All Junk.
Got this email today from Santhosh (Mysore,India), and had to share. I dunno if it’s truly the “World’s Smallest”, but it’s certainly small… at 12″ high and 18″ long. 12mph top speed… and 4kg (8.8lbs).
Look for Awesome Flag Placement, around 1:50.
I’m asking for build specs… stay tuned for an update.
Update- Just got this from Mr. Santhoush:
Mr. Santhosh who happens to hold two Limca world records has made Moosshiqk, a unique bike which as you can see is so small that you can pack it in your laptop bag and go to office. It is capable of carrying a 62kg person for 15 minutes at a speed of 15km/hr. So here are some questions thrown at the bike builder.
What was your inspiration in producing the bike?
From my kid days I am love with bikes and its repair, because my father had passion about bikes and repair,when I was a kid I would like to ride small bikes but its not possible because I am from a middle class family and it’s not affordable.
What is the maximum distance it can cover with a person?
We heaved tested for 15 minutes ride.
What is the general opinion of the public about this bike?
How to sit on the bike!
Where were the various parts of the bike acquired from, did you manufacture them yourself or otherwise?
Some parts like frame, handlebar, and some parts fabricated, some parts from cycle and some from e-bikes.
A little information on your bike building history.
I have done two other kid bikes using Sunny engines.
Anything you may want to add?
MOOSSHIQK (MOSHIKE) ITS drown from Sanskrit it means mouse.
It can be disassembled in less than 1 minute and can be assembled in the same time
Moosshiqk can be ridden backwards (reverse) also.
From the Dept of Insanely Cool Spreadsheets, here’s, simply, “batteries” on GoogleDocs. Headways, A123, Turnigy… presumably manufacturer specs. You can download as an Excel document, if you want to play with the sorting and stuff…
(Video from My E-Life Now! - a very cool blog.)
Read all about it on Ultimate:
TT Zero: MotoCzysz’s Rutter Breaks 100mph
“Michael Rutter and Team Segway Racing MotoCzysz made history on the Isle of Man Wednesday by becoming the first team to record a 100mph lap of the course in the SES TT Zero race in what is being hailed as one of the greatest achievements in the event’s one hundred and five year history.
“John McGuinness closely followed Rutter home on the Team Mugen Shinden machine with Michael Rutter’s MotoCzysz teammate Mark Miller taking the final podium slot, with all three breaking the prestigious 100mph mark, which was first achieved by a conventional bike by Scotsman Bob McIntyre in 1957.”
The more I learn, the more I revisit some basics and start asking questions… it feels like questions I didn’t know enough to even ask, but I guess that’s how you learn. Anyway, I’m starting a dirt bike project, and I have a nice little 48V motor, and started wondering if maybe I should plan around a 48V system instead of the 72V I’ve worked with in the past bikes. This led me to ask, why not?
The answer, (no surprise) is about balance.
Everything starts with Watts (or horsepower, or however you want to describe “work done”). Let’s say you want to go a certain speed… you need a predictable amount of power to do that. Remember, Watts = Amps x Volts. I promise this is going to be Math that even I understand, so don’t worry. Just pulling some numbers out of my hat, let’s say we need 20kw to go 70mph.
At 72V, you’d need around 278A to get 20kw. 20,000 (W) = 72 (V) x 277.77 (A) Since my system, and most systems, can dish maybe 450A before getting melty, then I’m in my safe zone. My motor, too, is probably happy.
At 48V I need a lot more. Pulling 20kw from 48V needs 417A or so. 36V is even worse, at a little over 550A.
Not only is my controller going to have to be overly beefy, but everything else is too, especially my brushes and other parts of my motor. Can you do it? With the right gearing, I think so. But is it a good idea? Nope. If I want an ultimate goal of 70mph, I’m going to have to live with 20kw. To get there in a good, balanced way, I want to run higher voltage… not just because of what I thought before – higher voltage gives you higher RPM – but because it gives you a better balanced system, and all the parts are going to play nice.
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