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What I mean is the front one works any time you're rolling whilst BB dynamo works only when you're pedaling. With no stand light/capacitors/batteries/etc. and only a BB dynamo you'd have no lights if you coasted down a hill for example. Also it'd have to be quite robust to withstand full torque and the cabling would be complicated with two dynamos. Just some first order considerations, it could work though
frankenbike-
Yeah but the dynamo in the end is some wire cabling around a spinning magnet. Magnet attached to normal spindle and wire as a casing (as you see plastic casing for vintage BBs)
In the end normal wheel dynamos are smallish. Could be done and also with a tiny bit of battery to hide inside the tubes that depart from the BB shell...need to patent this :) -
Isn't he referring to one of these?
EDIT: new paged. Apparently he isn't.
anidel
tallsam
Uh? The front wheel one does the same?
Unless these one also have an internal battery, in which case yes, you're right.
But still good IMHO.