most wanted cycling innovation?

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  • smoggysteve
    smoggysteve Posts: 2,909
    taon24 wrote:
    SmoggySteve wrote:
    taon24 wrote:
    The solution is surely to bin chains and derailleurs.
    Simply mount a dynamo in the bottom bracket and run the wires to a motor in the rear hub, which then moves your bike.
    You can alter your cadence by altering the magnetic field of the dynamo, which will then alter the power generated per pedal stroke.
    Clearly the rear motor simply makes use of the supplied power (however much there is).
    The bike manufacturers can then add extra power ports for certain bikes for your lights, gps, phone charger, heated saddle.

    A bike; with a motor on it!

    You should get down to the patent office asap before someone steals your idea.

    It is simply replacing the mechanical transmission with electrical transmission of power from pedals to rear hub. I'm sure you are aware of, or can look up, the difference between an electrical motor and a heat engine, and that an electric motor does not specify in any way the source of the electricity.
    Sure you could add a battery if you wanted to store power (which seems sensible but adds weight). I'm sure if you then could charge the battery independent of pedalling you could also create an electric moped, but that's not what I'm suggesting.
    You could also put the motor in the bottom bracket and simply have a front chain ring moving independently of the pedals based on the supplied electric current, which might be more efficient in terms of the mass of the motor.

    If you want these things on a bike to ride around town, then you may as well get an electric bike which already exists. If you think something like this is ever going to become something the pro's ride you are wasting your time.

    Since this is a forum for people who ride ROAD bikes thst are a reflection of what is raced by pro or semi pro athletes it us of little use having a motor which is never going to be uci legal
  • robbo2011
    robbo2011 Posts: 1,017
    Steve, the way i understand it is that the rider generates the electricity from pedalling which then goes on to drive an electric motor at the hub.

    It is basically a bad idea though, as the efficiency will be way lower than chain drive, meaning power generated by the rider wasted as heat.
  • taon24
    taon24 Posts: 185
    robbo2011 wrote:
    Steve, the way i understand it is that the rider generates the electricity from pedalling which then goes on to drive an electric motor at the hub.

    It is basically a bad idea though, as the efficiency will be way lower than chain drive, meaning power generated by the rider wasted as heat.

    That is currently the problem, I agree.
    The bikes are available, but with the knowledge that they have reduced efficiency (and are not suitable for racing).
    If they could solve it (room temperature superconductors would be required I suspect), then you can build bikes with continuously variable gearing and would hopefully have a bike with almost everything sealed completely away.
    You'd also find that you struggled to spin out at the top end speed.
    Measuring power output would also be easy - you simply calculate the current and voltage produced by the dynamo.
  • Initialised
    Initialised Posts: 3,047
    edited August 2014
    Ouija wrote:
    Why put dynamos in hubs OR bottom brackets... put them on the disk brakes...........

    Seriously. Imagine a standard disk brake rotor with some neodymium magnets embedded in the radial spokes that go from the center of the disk to it's edge. Then have a small generator that fits into the standard disk mounts and situates itself over the magnets without interfering with the brake caliper (or even merge brake caliper and generator into one combined unit). Has the advantage that it spins faster than the cranks (same as a hub dynamo) but doesn't stop you easily replacing parts when they brake or wear out.

    Also means you can have one on both front AND back wheels. And since everybodies using LED's these days there is no need for it to generate the sort of voltages that old dynamos try and achieve (a leftover from the "must be able to power a halogen front light" days). 4.2v at 1.5/2.0 amps is enough to drive a Cree XM-L light at a fair brightness (look at a 501 torch, for example). So, the generators don't have to be uber huge or heavy (a fraction of the size of those old 'bottle' dynamos you use on tyres).

    The disc is on the non drive side so wiring is heavier and more complicated than just running throung the drive side chain stay.
    I used to just ride my bike to work but now I find myself going out looking for bigger and bigger hills.
  • tapscrew
    tapscrew Posts: 56
    water proof gloves and shoe covers that actually are waterproof would be nice.
  • tapscrew
    tapscrew Posts: 56
    oooh, also gears and brakes that never need adjusting!!!
  • chris_bass
    chris_bass Posts: 4,913
    tapscrew wrote:
    water proof gloves and shoe covers that actually are waterproof would be nice.

    neoprene gloves are the way forward when it is wet! don't keep you dry but do keep you warm!
    www.conjunctivitis.com - a site for sore eyes
  • earth
    earth Posts: 934
    Ski lifts for the hills.
  • term1te
    term1te Posts: 1,462
    Permanent school holidays, to reduce the early morning traffic.
    The Master
    The Moser
    The VN
  • negativelycra
    negativelycra Posts: 225
    Fucking hell, this thread went all arse pretty swiftly, didn't it?
    [urlhttp://veloviewer.com/SigImage.php?a=f3252&r=3&c=5&u=I&g=s&f=abcdefghij&z=a.png]Veloviewer[/url]
  • MichaelW
    MichaelW Posts: 2,164
    earth wrote:
    Ski lifts for the hills.

    Done.
  • Daz555
    Daz555 Posts: 3,976
    The derailleur needs to die.
    You only need two tools: WD40 and Duck Tape.
    If it doesn't move and should, use the WD40.
    If it shouldn't move and does, use the tape.
  • mr_evil
    mr_evil Posts: 234
    taon24 wrote:
    ...Simply mount a dynamo in the bottom bracket and run the wires to a motor in the rear hub, which then moves your bike...
    Series-hybrid bikes already exist. It's an interesting idea, but I'm not sure there is any compelling advantage.
    https://mrevil.asvachin.eu/
  • SCR Pedro
    SCR Pedro Posts: 912
    A jersey pocket that can hold more than 2 hand grenades. Santini didn't think that one through at all.
    Giant TCR Advanced II - Reviewed on my homepage
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  • dennisn
    dennisn Posts: 10,601
    SCR Pedro wrote:
    A jersey pocket that can hold more than 2 hand grenades. Santini didn't think that one through at all.

    Not sure what kind of jerseys you have but ALL of mine will hold all kinds of stuff AND the kitchen sink(so to speak).

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