rec.sport.unicycling · Public discussion

Re: Physics/design question

Started by feel the light · · Last activity · 3 posts · 467 views

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rec.sport.unicycling
Published
11 May 2007
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11 May 2007
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feel the light
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  1. I was reading stuff about gears, chains, sprockets, looking for
    references about power loss etc. then I found this. The internal gear.
    I was familiar with these from planetary gears in boat transmissions,
    but had forgot about them. The inside gear.
    Now imagine a guni with an inside gear on each crank axle stub. This
    of course would mesh directly on a straight cut gear on the wheel
    axle.
    All of the advantages of my pedal backwards design, in terms of low
    power loss and drive train slop, and safety. Except now we can pedal
    forward normally. Cool huh ?
    OK, a pain to weld up, but you are good Pete. You could do this !😄

    +-------------------------------------------------------------------+
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    |Download: http://www.unicyclist.com/attachment/19895 |
    +-------------------------------------------------------------------+

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  2. feel the light said:

    I was reading stuff about gears, chains, sprockets, looking for
    references about power loss etc. then I found this. The internal gear.
    I was familiar with these from planetary gears in boat transmissions,
    but had forgot about them. The inside gear.
    Now imagine a guni with an inside gear on each crank axle stub. This
    of course would mesh directly on a straight cut gear on the wheel
    axle.
    All of the advantages of my pedal backwards design, in terms of low
    power loss and drive train slop, and safety. Except now we can pedal
    forward normally. Cool huh ?
    OK, a pain to weld up, but you are good Pete. You could do this !😄

    ohhh sweet
    but how will you keep "sludge" from building up in the internal
    gearing? (reasonably)
    i guess I can come up w/ a way or 2
    and you could make it an oil pan if you wish

    uhm
    i guess you can figure a way to connect the gears...
    put one gear between the 2
    make it solid to a frame extension
    it will have a big Q factor tho
    :/

    --
    skrobo

    Quoted message said:

    <> Unicycle For Christ <><


    'my video!' (http://www.unicyclist.com/forums/showthread.php?t=58465)
    ____________________________________________
    -last edited by \"elvisunifreak\" at 8:35 pm -
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  3. Maintanance ? It should last decades with just a wax and dust every few
    months. Sitting on the mantel, with the yellowing page of the Guiness
    book covered with yellowing plexiglass set out in front. Allow the
    curators in future centuries to worry about maintanance.
    It is for us, the living now, to create the worlds fastest uni.
    Few shall note , and none long remember what we may do here. The
    record, and the machine, craftsmen, and designers will not be
    mentioned.
    Unless we really bust the record !😄 Then our you tube video of some
    super pedaler going 30 + mph on a uni will stand for all involved as
    being just so cool😎
    We are talking the record !😄
    The need for excellent gear allignment, combined with the fact that
    this design mandates a minimum overdrive ratio of 3.5 to one, says this
    will be a special machine. The bonneville uni will be about as
    practical an everyday ride as other bonneville machines. Not at all !

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