Originally Posted by
andy_p
A lot of the problems with generating consistent power (typically for charging batteries) from a dynohub stem from the fact that it operates over a wide range of rpm. ......
can you elaborate on the shortcomings of hub dynamos regarding rpm?
The German standard requires the dynamo to bring the light up to full power at a fairly low speed.... 10kph or so, IIRC.
Of course, there are some dynamos being sold that don't meet the standard, or are designed for smaller diameter wheels, but anyone worried about low output at low speed wouldn't buy one of those.
Steve in Peoria