Advertise on Bikeforums.net



User Tag List

Results 1 to 15 of 15

Thread: Dynamo hub

  1. #1
    Senior Member
    Join Date
    Aug 2012
    Location
    England
    My Bikes
    Surly LHT
    Posts
    55
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Dynamo hub

    Has anyone used one of these on a tour for the purpose of charging lights, iPhone (and maybe handlebar speakers?)??
    Just wondering if any brands are recommended?
    Do they cause any drag?
    Do they keep said electrical items charged easily?
    Would a solar charger be a better idea?

    thanks

  2. #2
    Gone.
    Join Date
    May 2011
    Posts
    509
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by gordyb View Post
    Has anyone used one of these on a tour for the purpose of charging lights, iPhone (and maybe handlebar speakers?)??
    Just wondering if any brands are recommended?
    Do they cause any drag?
    Do they keep said electrical items charged easily?
    Would a solar charger be a better idea?
    You can't charge devices directly from a dynamo hub, because the voltage varies with speed. You need a voltage regulator. Until pretty recently, these basically didn't exist, but I notice that Peter White sells them now:

    http://www.peterwhitecycles.com/pedalpowerplus.asp

    I would also be interested to hear from anybody with experience with these.

    With respect to the hubs themselves, the gold standard is the Schmidt. Mine does not cause noticeable drag, and puts out plenty of power for a bright LED headlamp. A wonderful device.
    My speculation was that it applies to some degree in cycling, and I used the previous proof as my reasoning, but I can't prove how exactly it applies to it and to what degree. That, I have admitted, is speculation based on reasoning, but not at this point provable.

  3. #3
    Formerly Known as Newbie Juha's Avatar
    Join Date
    Mar 2002
    Location
    Helsinki, Finland
    Posts
    5,662
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    There is also the new Supernova dynohub that can be mechanically switched off when you don't need it, reducing the drag.

    In addition to the Pedalpower linked above Busch & Mueller have a couple of charging devices, the E-Werk and the USB-Werk. http://www.bumm.de/produkte.html

    --J
    To err is human. To moo is bovine.

    Who is this General Failure anyway, and why is he reading my drive?


    Become a Registered Member in Bike Forums
    Community guidelines

  4. #4
    Newbie
    Join Date
    Apr 2006
    Location
    Germany
    Posts
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There is good DIY project for an USB interface/loader based on a simple but quite effective cirquit:

    http://www.forumslader.de/12V-Versio...USB.209.0.html

    It's in german, but at least the schematic is international:
    http://www.forumslader.de/fileadmin/...an_Z-Diode.jpg

    If you'll need a translation of a dedicated part, just send me a message...

  5. #5
    Senior Member wahoonc's Avatar
    Join Date
    Jan 2005
    Location
    On the road-USA
    My Bikes
    Giant Excursion, Raleigh Sports, Raleigh R.S.W. Compact, Motobecane? and about 20 more! OMG
    Posts
    16,208
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I have used them to power lights and nothing else...yet. The drag will vary with the load and the quality of the hub. However even on the less expensive hubs on the market now the drag is not that noticeable. IMHO a dyno hub is going to be a better choice than solar, it will put out power as long as it is moving. With solar you have to have a certain angle and no clouds to get maximum output. The other option is to use the rechargeable battery packs. I know a couple of people that have used these with good results. They only have to recharge them once a week or so.

    Aaron
    Webshots is bailing out, if you find any of my posts with corrupt picture files and want to see them corrected please let me know. :(

    ISO: A late 1980's Giant Iguana MTB frameset (or complete bike) 23" Red with yellow graphics.

    "Cycling should be a way of life, not a hobby.
    RIDE, YOU FOOL, RIDE!"
    _Nicodemus

    "Steel: nearly a thousand years of metallurgical development
    Aluminum: barely a hundred
    Which one would you rather have under your butt at 30mph?"
    _krazygluon

  6. #6
    Randomhead
    Join Date
    Aug 2008
    Location
    Happy Valley, Pennsylvania
    Posts
    12,501
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    intellectually, I know there is drag, but I can't really see any evidence of drag. I ride a dyno hub all the time now, I'd rather have lights available to me than worry about a minuscule amount of extra work. B&M is coming out with a light that has a usb port on it, but AFAIK, it isn't released yet and I haven't seen any tests of it.

    The dynohub with a clutch is available under a number of brands, it's made by Shutter Precision and Velo Orange sold it for a while. It weighs quite a bit more than their other hub, and I don't see the advantage of the clutch.

  7. #7
    Senior Member
    Join Date
    Jul 2011
    Posts
    1,447
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It is funny when you get a new set of uber hubs with cartridges in them and you turn the axle, they are sticky. But build them out, and you don't feel them when they are being turned by a big wheel, is that the kind of drag we are feeling here, or are we talking feeling it in the pedals? if slightly.

    I don't care about light for touring. It is never enough for my potential uses, like driving at night. I get by with the simplest of LED lights for what I do get up to. I don't use a lot of electronics, but if I could recharge my stuff I would think about using more, so a USB hub of the rolling kind would be cool. Since they are fat anyway, a USB dyno hub with the same spoke length as a Rohloff would be pretty neat.

  8. #8
    Senior Member
    Join Date
    Jul 2011
    Posts
    1,447
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    An OT question, but I think the people who know the answer may be here. Pre-LED the hubs developed X potential to drive those lights. Now people want to charge their USB stuff, so I doubt there will be a desire to drop the potential much. But if you just ran the generator system for lights, you could get the same amount of output we had with incandescent lights out of LEDs, for maybe 1/10th the electrical load. So the question is, what are the new LED generator light systems like. Do they just blow the old incandescent systems out of the water, or are they the same general light level, and the same general resistance on the pedals?

    I used to have a fancy German system on a recumbent bike, and it ran off the tire. That would be a perfect technology to run at normal light levels, but with LEDs and with very much reduced drag, because those systems do let you know they are there, and they can badly wear your tire. But if they had near zero drag, they would be a real option for someone who just wanted to run lights.

  9. #9
    Senior Member Aushiker's Avatar
    Join Date
    Jun 2007
    Location
    Fremantle, Western Australia, Australia
    My Bikes
    LoGo P-38, Bacchetta Giro ATT 20, Look 555, Giant XTC 2, Surly Long Haul Trucker
    Posts
    971
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by corvuscorvax View Post
    http://www.peterwhitecycles.com/pedalpowerplus.asp

    I would also be interested to hear from anybody with experience with these.
    I don't have one of the PedalPower+ units sold by Peter White but I do have a PedalPower+ Super-i-Cable. Whilst I haven't had the greatest run with mine; I am waiting on my second replacement, when it is working it is working great bit of kit.

    My approach is to use mine in combination with my SON 28 on my Surly Long Haul Trucker to power my Garmin Edge 800 during the day and in camp to boost charge my iPod Shuffle/Samsung Galaxy S2 phone/iPad as necessary. This was working okay on my last tour until the PedalPower+ Super-i-Cable starting playing up.

    If you are interested my review of the PedalPower+ Super-i-Cable can be found at Aushiker.com and my approach to touring with an iPad at the same blog.

    On the question of drag. Well my SON 28 is built into the front wheel of my touring bike. If there is any drag I am not noticing it given the bike weight etc. I also have a Shimano dynamo waiting to played with in anger on my mountain bike. That hopefully happens next week.

    Regards
    Andrew

  10. #10
    Senior Member wahoonc's Avatar
    Join Date
    Jan 2005
    Location
    On the road-USA
    My Bikes
    Giant Excursion, Raleigh Sports, Raleigh R.S.W. Compact, Motobecane? and about 20 more! OMG
    Posts
    16,208
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by MassiveD View Post
    An OT question, but I think the people who know the answer may be here. Pre-LED the hubs developed X potential to drive those lights. Now people want to charge their USB stuff, so I doubt there will be a desire to drop the potential much. But if you just ran the generator system for lights, you could get the same amount of output we had with incandescent lights out of LEDs, for maybe 1/10th the electrical load. So the question is, what are the new LED generator light systems like. Do they just blow the old incandescent systems out of the water, or are they the same general light level, and the same general resistance on the pedals?

    I used to have a fancy German system on a recumbent bike, and it ran off the tire. That would be a perfect technology to run at normal light levels, but with LEDs and with very much reduced drag, because those systems do let you know they are there, and they can badly wear your tire. But if they had near zero drag, they would be a real option for someone who just wanted to run lights.
    The LED lights are much, much better than the old incandescent and even the halogen. I have several vintage bikes with the Sturmey Archer dyno hubs on them. The output on those hubs ranges from 1.6-2.0 watts. With the old lights it was more of a be seen that really see where you were going. I put LED lights on a couple of those hubs and I have as good a lighting as I get out of a car or motorcycle. IMHO some of the best LED lights on the market come from B&M I have 4 different LED headlights from them. The Lumotec Cyo is the best of the ones I have. Edelux is another one that puts out an amazing amount of light.

    Another huge advantage to the LED lights is no burned out bulbs, or blown bulbs because you over powered them on a downhill. On my city bike the light actually powers up enough at a walking pace to provide lighting to see by.

    Aaron
    Webshots is bailing out, if you find any of my posts with corrupt picture files and want to see them corrected please let me know. :(

    ISO: A late 1980's Giant Iguana MTB frameset (or complete bike) 23" Red with yellow graphics.

    "Cycling should be a way of life, not a hobby.
    RIDE, YOU FOOL, RIDE!"
    _Nicodemus

    "Steel: nearly a thousand years of metallurgical development
    Aluminum: barely a hundred
    Which one would you rather have under your butt at 30mph?"
    _krazygluon

  11. #11
    Senior Member
    Join Date
    Jul 2011
    Posts
    1,447
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks Aaron, that is what it should be, but I had not experienced it myself.

  12. #12
    Senior Member Hairy Hands's Avatar
    Join Date
    Feb 2009
    Location
    Magnolia, Texas
    My Bikes
    Colnago C50, Specialized TriCross Carbon
    Posts
    285
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    [QUOTE=MassiveD;14812113]It is funny when you get a new set of uber hubs with cartridges in them and you turn the axle, they are sticky. But build them out, and you don't feel them when they are being turned by a big wheel, is that the kind of drag we are feeling here, or are we talking feeling it in the pedals? if slightly.

    I just had a SON 28 rim built by Peter White. When you spin the wheel it will barely spin a complete circle and you can feel the grabbyness of the magnets in the hub.. The hub has numerous magnets inside the hub that have opposing polarity magnets and as you spin the wheel unloaded you can feel the drag very easily.. but once the wheel is on the ground and spinning I cannot feel any difference over a standard non-generator wheel.
    ~John~

  13. #13
    Gone.
    Join Date
    May 2011
    Posts
    509
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by MassiveD View Post
    I don't care about light for touring. It is never enough for my potential uses, like driving at night.
    Modern LEDs such as a Schmidt Edeluxe run by a generator hub are incredibly bright, and quite sufficient for lighting up pitch-black roads. And they are light enough that it is reasonable to carry a light even when you don't think you'll need one.

    Did a short tour along the Danube on the Serbian/Romanian border last year, and didn't figure I would need a light, as I was planning on short days, all in daylight. I brought my Edeluxe anyway, and I was glad I did: the route is punctuated by half-kilometer long, curving highway tunnels with no lighting. Scary enough with the light, but it would have been really dangerous without. And there was no alternate route.
    My speculation was that it applies to some degree in cycling, and I used the previous proof as my reasoning, but I can't prove how exactly it applies to it and to what degree. That, I have admitted, is speculation based on reasoning, but not at this point provable.

  14. #14
    Senior Member
    Join Date
    Dec 2010
    Posts
    160
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If going for convenience, and charging at low speed, best I've found is the Plug 2+:

    http://www.sjscycles.co.uk/tout-terr...ice-prod27695/

    Get a USB socket on the headset, charges at low (though not mountain-climbing-low) speeds.

  15. #15
    Senior Member
    Join Date
    Nov 2004
    Location
    South Bend, IN (U.S.A.)
    My Bikes
    Surly LHT; Surly CC (as fixed-gear commuter); Hunter CX; Dahon Mu Uno
    Posts
    420
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I used a hub generator coupled with an E-Werk and a small storage battery for all of my power requirements while riding the Northern Tier in 2010 -- I never plugged in. This included my camera batteries, an iPad from which I wrote a daily blog entry and my cell phone (in addition to some headlight and tail light use).

    Here's the blog, if interested, which includes a complete parts list and a description of how I did the power management: http://hpscott.wordpress.com

    I did this at least partly just to see if I could, and there were many times for which things would have been far easier had I just plugged in while eating at restaurants and staying in campgrounds. That said, it did indeed work.

    Were I to do this over again, I'd probably use the charging equipment again, but I wouldn't be so strict about never plugging in.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •