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Old 08-07-2010, 12:53 AM   #11 (permalink)
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You can go far enough with that. Nice work.

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Old 08-07-2010, 10:12 AM   #12 (permalink)
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CM400E - '81 Honda CM400E
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Originally Posted by Nevyn View Post

so yeah, we'll call it 15 miles range. I did all the math right, yes?
Yeah, for the most part. I would change your DOD to 50% though. As you get closer to 100%, your voltage drop while accelerating will get you closer and closer to 10.5V/battery. If you drop below that you risk ruining the battery. Therefor, as you get closer to 100% DOD you have less and less power available for acceleration (pull more amps, more voltage drop). Plus, there is a fairly large drop off in usable cycles in lead acid batteries after 50% DOD from the charts I've seen. Not saying you can't take it to 80%, but I wouldn't count on it on a regular basis.
Current project: A better alternator delete
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Old 08-07-2010, 11:03 AM   #13 (permalink)
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Originally Posted by Nevyn View Post
So, I posted out to Freecycle in my area looking for treadmills. Got a hit! brought it home, opened it up, and found this:

Paul, Ben, and crew - is it worth anything, as far as go-kart size is concerned?

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External Fan
90VDC, 1 HP SCR Controller 6 MPH
115VDC, 1.25 HP PWM Controller 8 MPH
That should work nicely for a hybrid bicycle. Ignore the MPH numbers since it appears to be originally geared for some piece of heavy machinery and you'll want to gear it for a top speed of about 20-30MPH for a hybrid bicycle, more if you want something to race with.

If America manages to eliminate obesity, we would save as much fuel as if every American were to stop driving for three days every year. To be slender like Tiffany Yep is to be a real hypermiler...

Allie Moore and I have a combined carbon footprint much smaller than that of one average American...
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