Originally Posted by
cplager
This all makes sense. And it's true for a dynamo hub since that depends on RPM (which is higher for a smaller wheel). This would not be true for a bottle generator rubbing against the wheel.
Cheers,
Charles
The same applies to bottle generators... the smaller wheel spins faster and so does the dyno.
My new Moulton has very small wheels and a Shimano generator wired to a Halogen lamp... even at low speed the output is exceptional on what is typically used as a higher speed light.