Originally Posted by
steelbikeguy
Have they ever built a prototype that can generate the 2 to 3 watts required to drive a proper headlight? The generator portion would probably end up the same size as the old bottle dynamos, but how big would the disc of magnets need to be?
and of course, as the disc of magnets grew in diameter, the rotor speed of the dynamo would slow down and drive the dynamo to be larger.
I imagine that the designer started out wanting to create a conventional 3 watt light, but it evolved to be too large to be practical... but it would be interesting to learn the details.
Steve in Peoria
If I recall, Magnic is a German company. They probably think about watts electrical output, but I bet they think even harder about compliance with STvO compliance. This standard states the minimum power needed for legal sales of a bike light system in Germany. I haven't followed bike lighting standards for a while, but in the past it was necessary.