2-speed gearing

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Old 10-15-2007, 08:47 AM
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How does it work on an electric vehicle? I mean, do they make them for electric vehicles? What are the positives and negatives of using one?

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Old 10-15-2007, 08:50 AM
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here you go,
http://cgi.ebay.com/ws/eBayISAPI.dll...MEWA:IT&ih=003
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Old 10-15-2007, 09:01 AM
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Wow... interesting idear.

Why aren't they more common? I never even knew they existed.

What's the problem with them?
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Old 10-15-2007, 12:29 PM
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The biggest problem, might be no brakes. It has to have a one way bearing, on the main shaft and second runs on a centrifugal clutch. So there would be no way to provide braking unless there is a provision to do it mechanical
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Old 10-15-2007, 12:36 PM
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Beware!!!! Read the feedback that dude got for those 2speeds, its not good...i was thinking about getting that for an onroad car I have and went back into his feedback and it didnt seem good...check it out first.
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Old 10-15-2007, 03:17 PM
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Originally Posted by dustyz View Post
How does it work on an electric vehicle? I mean, do they make them for electric vehicles? What are the positives and negatives of using one?

Thanks!
I think this was discussed a long time ago, but the bottom line is that a 2-speed is very unnecssary in an electric vehicle. Without going into much detail, a nitro engine can benefit from a 2-speed, since you can keep the engine in a rev range were torgue is maximized. On the other hand, an electric motor has maximum torque at low speed. Someone mentioned that a two-speed would probably increase wear on the typical r/c brushed motor, as there is a sudden spike in load upon shifting.
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