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Old 03-16-2010, 11:48 PM   #1 (permalink)
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Hello all, I haven't been on here in awhile, and a lot has changed. In January, I started a Senior Pilot Program at my high school with two friends. What that means is that we get to take class periods off to complete a Senior Project to be completed by a set date in May. Our project: a home-brewed Electric Vehicle! Now, we've been working on the project since then so theres a lot of catching up to do and i'm short on time, but i just wanted to get the thread started and see some initial reactions. Pictures and more details will be up soon, but i can share that the base vehicle is a "suri," a four-person pedal-car type of vehicle. The motor is going to be a 24v, powered by 4 12v lead-acid batteries and controlled with a variable-speed controller. Thats all for now, tune in for more.

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Old 03-16-2010, 11:52 PM   #2 (permalink)
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Sounds like you have a cool school, quite unlike the mill I went through, which almost completely destroyed my interest in learning.
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Old 03-17-2010, 12:19 AM   #3 (permalink)
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youngun -

Like this, only better?!?!? :



Gives me that "The Prisoner" feeling. In a good way.

Can't wait for the real pix!

CarloSW2
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Old 03-17-2010, 09:35 AM   #4 (permalink)
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If you can go with higher voltage, it will reduce your controller cost, give you a higher top speed and allow you to use smaller gauge wire for a given speed.
36v and 48 volts are rather common, if you use hub motors electricrider.com has some that go up to 72 volts.
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Old 03-17-2010, 10:30 AM   #5 (permalink)
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cfg83, that's exactly what we're working on, except ours is a bit older and less fancy but looks very much the same. we've removed that roof awning thing as well.

Frank- hahhha my school is hardly "cool," in general, but it does have some nice aspects to it that are much appreciated.

Ryland- We're most likely going with 24v because we are only going to be rocking 4 batteries, and we can get a 24v charger donated (most likely) or for reduced cost. We aren't looking to make it a speed demon either, as we're trying to keep it bike-path legal to make it more appropriate for our area.
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Old 03-17-2010, 03:37 PM   #6 (permalink)
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Quote:
Originally Posted by younggun View Post
we're trying to keep it bike-path legal to make it more appropriate for our area.
Check your motorized bicycle laws, most states ban the use of the motor on a motorized bicycle on bike paths that are not part of the city street, this includes trails, side walks and over pass walkways, you can still use human power but not the motor, however most states have a 25 or 30mph speed limit for motorized bicycles.
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Old 03-18-2010, 12:11 AM   #7 (permalink)
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Where my buddy teaches shop, the students run all kinds of lawnmower/go-kart mashups on the adjacent street, often with no brakes and dodgy steering. The principal just told the homeowners to watch out and shut up, in the finest diplomatic way.
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Old 03-18-2010, 09:34 AM   #8 (permalink)
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Quote:
Originally Posted by Bicycle Bob View Post
Where my buddy teaches shop, the students run all kinds of lawnmower/go-kart mashups on the adjacent street, often with no brakes and dodgy steering. The principal just told the homeowners to watch out and shut up, in the finest diplomatic way.
Most state have some pretty interesting laws around vehicles that can be used on public streets if they are owned by the school and are used as a teaching tool, they tend to have to stay within a few miles of the school of course but they don't always even need license plates or a title.
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Old 03-18-2010, 09:47 AM   #9 (permalink)
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...of course, the school "parking lot" can provide an 'interesting' slolam course at night when it's empty!
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Old 03-18-2010, 09:29 PM   #10 (permalink)
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So... big day.

Today we stopped by a local golf course which I had contacted for possible donations, and we were given three 12v Trojan deep-cycle lead acid golf cart batteries, and a 36v motor controller . In addition, the kind folks in the maintenance department said that in a couple weeks or so they could throw in an essentially completely working Smithco Sand Star E sand trap groomer. Dont know what that is? neither did we. its one of these, except a 1996 version without all the bells and whistles, and the version pictured is a gasoline model.

http://www.smithco.com/images/produc...tar%202009.JPG

The only parts that are in less-than perfect working order are the steering and the sand rake mounted on the back. The six 6v lead acid batteries, 36v motor and controller, and all associated wiring and hardware (aka everything we need off of it) are in fine working order. They have a brand-new one on order, and if the higher-ups give them the green light, they will let us have it (as opposed to bringing it to the landfill!) To call this a score is an understatement.

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