Friday, June 5, 2009

Chassis Design

We have been getting mails and messages requiring blue prints for chassis. There is a lacj of enough info about that on the net.
When we initailly began, we couldn't find any resource on that. We had a hard time deciding on that. We had a few options in mind. We definitely wanted to go for the Fly Type chassis but strictly sticking to it was out of question due to many reasons:

1.) this is an EV and the usual layout would suffice due to the extra requirements like allocation of space for battery.

2.) we hadn't finalised the battery type and all and it could keep changing due to the cost and requiremnts.

3.) we had no previous experience with any pf this designing.

We finally approached Sujith-ettan at Bike World in Kalmandapam, Palakkad. He has some good experience with bike alterations. We put oru problem before him and he said he would help. We drew a rough sketch for him from a few pictures we had and plus the one quad bike we saw at Ernakulam.

We started with the back part. You can see the pictures of the same in earlier posts. Then, we welded together the chassis of a 4S bike and made the necesaary chnages to it.

More details of the chassis design will be put after ur feedbacks.

Thank You.

Tuesday, June 2, 2009

Saturday, May 30, 2009

Sunday, May 24, 2009

The Final Countdown

The final countdown for the project presentation is here. The date is June 5th. that gives us 10 days to complete. Now, we have to compete against time.

Wish us all the best.


Wednesday, May 6, 2009

Update!!!

It been over a month that we have updated the blog.

We were going thru a time of difficulties. Firstly, we had a problem with the financing. We had cut down ou budget drastically due to various reasons. This isn't fair playground for us. While motor controllers cost aroun 6K in the international market, it costs nearly 20K in our domestic market. It isnt something we could afford. So we have to do without the controller!!! And we didn't have an alternative plan of actions.

The internet is a wondeful invention. We contacted some people over the net. And they were real quick in their response. They are mostly hobbyists and engineers. Worth mentioning are Gav Master from Surat, Prasad from the UK, Jon from  the US etc. Now we are on track of bulidin our own simple controller using either PWM or ADC. The finer details haven't been made yet. We'll keep u posted on the developments regularly. U can also help us with ur suggestions in this area.

We got a new shaft on our motor. Had taken it to  a local lathe. the guys at Chemmanur lathe in Palakkad did a really good job. We initially had a really small shaft or rather no shaft at all. Now we have a 5 inch shaft!!! Its a good job to say the least.

The works in the chassis area is moving at a snail's pace. We hope to speed it up this week.

Also, we are working on the charger circuit. We have decided to keep it simple. Just a step down transformer and a rectifier. 

We have to procure some items. don't know about the price of all that. A potbox would cost somewhere near 5K. Again, its ahuge amount. But in the Indian marlet, we don't have an alternative!!! 

Hope that Indian electronics market would flourish and the prices would come down in a few years.

Regards,

Team GreenMile
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