The lights have a rotating ring of small, very strong magnets in them, which think are somehow turning in response to the wheel going by them, but I’m not sure.
As I said, in the real world, on real bikes, I can’t feel any kind of drag from these lights. My guess is that they’re much more efficient than a standard hub or bottle generator, which has much larger physical parts that are rotated by the motion of the bike and, in the case of a bottle generator, friction between the tire and the generator. The drag must be measurable, but it’s not perceptible to me. Hold up the front wheel on a Magnic-equipped light and spin it … it just spins, like the lights weren’t there. Even a very efficient hub generator, with the lights off, doesn’t spin as easily. --Eric Norris [email protected] www.campyonly.com campyonlyguy.blogspot.com > On Nov 9, 2015, at 10:30 AM, Curtis McKenzie <[email protected]> wrote: > > So true, not friction. > > However, work must be done to induce a current. What object is doing the > work? > > http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html > <http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html> > > Curtis "where friction is is not work" McKenzie > > On Mon, Nov 9, 2015 at 10:19 AM, Eric Norris <[email protected] > <mailto:[email protected]>> wrote: > This looks like it works on the same principle as the Magnic Lights, which > I’ve been using for several years. Magnic just came out with Ver. 2 of their > product, which added new circuitry for a steadier and brighter light. > > No friction!? Absolutely true. There is no contact between the Magnic light > and the bike, other than the mount. The system generates energy from the > motion of the (alloy or steel) rims passing by the light. > > I have one of the new headlights, but I haven’t had time to use it. The first > gen lights aren’t nearly as bright as, say, an Edelux, but for me they’re > certainly bright enough to ride with. They’re also always on, adding the > benefit of daytime running lights. > > Despite the protests of skeptics, I would say that the lights have no effect > on the bike’s speed. If there is, I can’t feel it. Yes, you don’t get > something (light) for nothing, but the Magnic Lights come very, very close. > > P.S. The inventor of the Magnic Light is currently fighting several patent > battles with other companies using the “eddy technology.” This might be one > of them. > > P.P.S. Magnic Lights are available in the USA from Clever Cycles in Portland > OR. > > --Eric Norris > [email protected] <mailto:[email protected]> > www.campyonly.com <http://www.campyonly.com/> > campyonlyguy.blogspot.com <http://campyonlyguy.blogspot.com/> >> On Nov 9, 2015, at 10:02 AM, Curtis McKenzie <[email protected] >> <mailto:[email protected]>> wrote: >> >> Neo Light >> >> No friction? Interesting. Grin. >> >> Curtis "cannot get something for nothing" Mckenize >> >> On Mon, Nov 9, 2015 at 9:29 AM, dstein <[email protected] >> <mailto:[email protected]>> wrote: >> I got a little liquored up and backed a few too many kickstarter projects >> the other night: >> https://www.kickstarter.com/projects/1651132789/neo-worlds-most-powerful-friction-free-bikelight >> >> <https://www.kickstarter.com/projects/1651132789/neo-worlds-most-powerful-friction-free-bikelight> >> >> This looks cool but looks like it is just meant for city riding? Not a lot >> of info on the site about brightnewss. Either way, I don't want to spend the >> time and money on a dedicated dyno set so we'll see how this turns out. Will >> write up on it when I have it >> >> >> >> >> >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "RBW Owners Bunch" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] >> <mailto:[email protected]>. >> To post to this group, send email to [email protected] >> <mailto:[email protected]>. >> Visit this group at http://groups.google.com/group/rbw-owners-bunch >> <http://groups.google.com/group/rbw-owners-bunch>. >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "RBW Owners Bunch" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] >> <mailto:[email protected]>. >> To post to this group, send email to [email protected] >> <mailto:[email protected]>. >> Visit this group at http://groups.google.com/group/rbw-owners-bunch >> <http://groups.google.com/group/rbw-owners-bunch>. >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. > > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To post to this group, send email to [email protected] > <mailto:[email protected]>. > Visit this group at http://groups.google.com/group/rbw-owners-bunch > <http://groups.google.com/group/rbw-owners-bunch>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. > > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To post to this group, send email to [email protected] > <mailto:[email protected]>. > Visit this group at http://groups.google.com/group/rbw-owners-bunch > <http://groups.google.com/group/rbw-owners-bunch>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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