Re: A Non-friction bicycle lights generator (dynamo)

On Sat, 05 Nov 2005 08:25:33 -0700, Jim Thompson
<NotValidForEmail@xxxxxxxxxxx> wrote:

>On 5 Nov 2005 07:20:38 -0800, iwicom@xxxxxxxxx wrote:
>
>>In this new generation bicycle light system, no battery is needed, no
>>friction on any parts of the bicycle. The lights flash regardless speed
>>of the bicycle and weather conditions (unlike normal dynamos!). Very
>>bright.
>>
>>It can be used as a stand-alone light system (as a normal dynamo) on
>>your bike, or used as a back-up for your existed battery-powered lights
>>
>>All details and buy on-line: http://www.freelights.co.uk
>
>Barf. No drag at all means no power transferred... there has to be
>SOME drag.
>
> ...Jim Thompson



They admit to a very small drag. But the flipping-magnet scheme is
very clever, and as they point out there's very little mechanical
power required, and no friction like wheel-contact generators have.

I like it.

John

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