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#1101627 - 02/02/15 12:18 PM 3 W Dynamo Power
ConRAD
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.. just wondering where and when the universal “3W” standard power size, commonly used for bicycle generators, did it come from. With a few exceptions indeed, e.g. 2.4W Shimano and 6W-12V B&M, most of generators on the market today are rated 3W (nominal power).
Anybody knows why?
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#1110283 - 03/05/15 10:46 AM Re: 3 W Dynamo Power [Re: ConRAD]
joerg046
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Originally Posted By: ConRAD
.. just wondering where and when the universal “3W” standard power size, commonly used for bicycle generators, did it come from.


I know why.

There was an old german Law of the for traffic.
in this law, all bicycle components where rated at 15 km/h.

A 3W Bicycle Dynamo had to power the 2,4 w front bulb and the 0,6 W rear bulb (3W) at 15 km/h at full Power.

Today, with LED Equipment, it would be more interesting to know the mAmpere, that are delivered.
Because the Volt are depending on the Speed.
Servus, Jörgi aus München bier

Münchner Liegeradstammtisch
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#1110818 - 03/06/15 10:46 PM Re: 3 W Dynamo Power [Re: joerg046]
ConRAD
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Originally Posted By: joerg046
... a 3W Bicycle Dynamo had to power the 2,4 w front bulb and the 0,6 W rear bulb (3W) at 15 km/h at full Power ...

Very clear, thank you.
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