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New no-friction rim-dyno light kickstarter

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Old 11-03-15, 06:23 PM
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New no-friction rim-dyno light kickstarter

I'm not associated with the makers (or even a backer of the kickstarter), but I thought commuters might be interested in this.

The light it outputs up front looks pretty weak, but the rear might be up to par with a regular blinkie. BUT, it should give something like the ultra reliability of a full hub dyno system at a fraction of the price/performance -- and with none of the friction of a regular bottle dyno.

Could be a viable backup for a primary battery-operated system, especially as there are plenty of slots available for an $18 backer vs projected $60 msrp
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Old 11-03-15, 07:01 PM
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It'd be interesting to see that tech incorporated into the frames of mid-priced and better bikes as part of a standard basic always-on light kit.
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Old 11-03-15, 07:07 PM
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I would have joined if there wasn't a 12 dollar shipping charge. For 30 bucks I'd rather just get a second back up light, but it is a very cool concept.
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Old 11-03-15, 07:53 PM
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That's a really good idea. I wish the front one put out more light, but it might work fine as a "be seen" light.
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Old 11-03-15, 09:26 PM
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Originally Posted by SlvrDragon50
I would have joined if there wasn't a 12 dollar shipping charge. For 30 bucks I'd rather just get a second back up light, but it is a very cool concept.
I didn't see that, you're right that kind of tips it over the edge.
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Old 11-04-15, 08:12 AM
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Keep in mind that even though there's no friction from a bottle dyno, there will still be magnetic resistance from the generator built into this system. The intro video doesn't really say how much. The only way you could get "free" power from such a device would be if it only drew power when braking.
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Old 11-04-15, 08:15 AM
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i like the idea but.. I agree with

@canklecat
It woudl be really cool if they could partner with a bike manufacturer specifically for those who make bike commuter oriented products and incorporate the technology into the bike. It would be really cool to see the technology a little more streamlined into a rack or racks or something!
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Old 11-04-15, 08:42 AM
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Well, they're claimed to be brighter than Magnic eddy current lights, so I guess that does represent an advance of some sort, but 118 lumens is still only as bright as a 'no-friction' $5 flashlight.
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Old 11-04-15, 09:31 AM
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Sweet, I am in for a set. I had a different reelight set for my son, w/ magnets for the front wheel, and it lasted through middle school for him. Died around the end of headlight time in 8th grade. So this new set will go to his sister who starts middle school in the fall, see if it lasts longer for her than the clunkier one did for him.

Can't overstate the value of lights for kids that you don't need to remind them to turn on/off.
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Old 11-04-15, 10:14 AM
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I'm glad to help hook you up with that!
@RidingMatthew, you're right it would be cool to see something like this integrated into a rack system. Also I've always wondered why more racks don't have integrated or optional built-in fenders, since a rack could be considered a super-heavy-duty fender mount (that can also carry a load)
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Old 11-04-15, 11:00 AM
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@RubeRad that is a good idea too


shh dont say anything someone will steal it and make a kickstarter out of it.
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Old 11-04-15, 11:05 AM
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"Friction free"

"Environmentally friendly"

Where is the power coming from if there is no extra "friction" on the wheel?

Another kickstarter playing on the ignorance of the masses.

I think this would be interesting as a rear light, but at 118 lumens, not worth it's weight for a front light.
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Old 11-04-15, 11:40 AM
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Originally Posted by RidingMatthew
@RubeRad that is a good idea too -- shh dont say anything someone will steal it and make a kickstarter out of it.
There are a couple already, like this (which doesn't look like much of a fender, maybe that's why the concept hasn't taken off?) or this blackburn says it has "integrated fender mount", but I don't really know what that means.

Anyways, I find that the deck of my current rear rack, practically speaking, acts as a pretty good fender already.
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Old 11-04-15, 07:19 PM
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Originally Posted by corrado33
Where is the power coming from if there is no extra "friction" on the wheel?
I think they're doing a semantic dance with 'friction' and 'drag'.
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Old 11-04-15, 07:38 PM
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Looks like a cool idea. This patent application describes the concept:

Patent US20140132155 - Device for contactless current generation, in particular bicycle dynamo ... - Google Patents

This application was referenced at the Magnic website. I'm not a patent lawyer, but a delay of a couple years from filing to issuance is not surprising. I'm half tempted to try and make one, not because I think that I can save money, but just because it's interesting and I'm curious.
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Old 11-04-15, 10:59 PM
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I already have friction free tail lights that are much brighter and cost less. OK, so I have to charge them up once in a while, but it's really easy. Don't quite see the appeal of this light. Plus, it won't work on my helmet, which is the most visible tail light I use.
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Old 11-05-15, 11:42 AM
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Once in a while, your batteries will conk out before your ride is done. The appeal is that this can act as a backup light for scenarios like that, at way less than the cost of going full-dyno. Also, it's as easy to move from bike-to-bike as a battery light. But you're right it's not for everybody. Many people are not concerned about the low chance of failure of battery light systems, but some people are very concerned about it. That's why hub dynos exist.
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Old 11-07-15, 07:56 AM
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Originally Posted by IrishBrewer
Keep in mind that even though there's no friction from a bottle dyno, there will still be magnetic resistance from the generator built into this system. The intro video doesn't really say how much. The only way you could get "free" power from such a device would be if it only drew power when braking.
This is correct. Eddy currents generated by metal moving through a magnetic field will induce current, but also cause drag. This effect has been exploited for bike trainers as well as locomotive brakes. The drag is proportional to the velocity of the rim.

Unlike most kickstarter campaigns, I like this design, although for $240 (front and rear units), you could probably put together a hub dyno system.
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Old 11-07-15, 09:59 AM
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Haha. "No friction". Sure, no loaded mechanical rubbing of two surfaces, but they are definitely trying to play off of public ignorance for this one.

I'm going to put 500 of these things on my bike and solve the world's energy problems. Who wants some free energy?
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Old 11-07-15, 05:19 PM
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Originally Posted by Moe Zhoost
This is correct. Eddy currents generated by metal moving through a magnetic field will induce current, but also cause drag. This effect has been exploited for bike trainers as well as locomotive brakes. The drag is proportional to the velocity of the rim.

Unlike most kickstarter campaigns, I like this design, although for $240 (front and rear units), you could probably put together a hub dyno system.
$240? Right now there are still spots available for $18 single-light (can you do that twice to get both for $36?) and there are double-light spots available for under $100 (plus shipping, as mentioned above)
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Old 11-07-15, 10:06 PM
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So I got some little magnets. I held one of them up to the wheel, and it sticks. I was puzzled for a moment, until I remembered that all of my wheels have steel wire beads.
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Old 11-08-15, 12:33 PM
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Originally Posted by RubeRad
$240? Right now there are still spots available for $18 single-light (can you do that twice to get both for $36?) and there are double-light spots available for under $100 (plus shipping, as mentioned above)
I was looking at the recommended retail price. All the permutations of pledges/offers confuse me.
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Old 11-08-15, 01:21 PM
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Originally Posted by alan s
I already have friction free tail lights that are much brighter and cost less. OK, so I have to charge them up once in a while, but it's really easy. Don't quite see the appeal of this light. Plus, it won't work on my helmet, which is the most visible tail light I use.
Just because it won't meet your needs, or mine doesn't mean it can't be the perfect solution for some folks, and their needs.
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Old 11-08-15, 01:48 PM
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I think it looks cool. Don't know it'd work for my needs, but cool.
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Old 11-08-15, 07:18 PM
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Originally Posted by himespau
I think it looks cool. Don't know it'd work for my needs, but cool.
Lots of ambient light, and moderate traffic, or mostly paths and trails?

Naturally one isn't limited to just them if they don't meet all their needs.
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