rec.sport.unicycling · Public discussion

Crazy Arms

Started by al_lieffring · · Last activity · 16 posts · 482 views

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rec.sport.unicycling
Published
8 May 2006
Last activity
8 May 2006
Original author
al_lieffring
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16
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  1. I know that the idea of having crank arms on a Coker that are adjustable
    in length isn't anything new. But here is my take on the idea.
    I made up a set of cranks that adjust by a quick release lever on each
    crank so that an arm at the end of the crank can rotate to different
    length settings. Because the main crank arm is concentric, and the
    adjuster arm is excenteric (crazy) the 1956 C&W song "Crazy Arms" is
    stuck in my head now.
    'Crazy Arms Video' (http://tinyurl.com/rw2m7)
    I rode about 25 miles with them on Friday, they realy make hill
    climbing a breeze when set at the max length 165mm and then I can realy
    cruise along on the flats with them set at around 120mm and on rolling
    terrain set at around 145mm.

    Al :O)

    --
    al_lieffring

    sola rota Ya'll
    Al Lieffring :O)
    'Al's Unicycling Club'
    (http://sports.groups.yahoo.com/group/alsunicyclingclub/)
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  2. That is a very interesting idea, and I think it would work really well.
    The only possible negative side is if the quick release comes loose
    while you're riding...that might turn out badly. But still, I like it!
    Also, it would be cool if there was some way to do it while you're
    riding, but I don't see how that could work....

    --
    James_Potter

    i still believe that all you need is love...john
    lennon
    '*mikael atkinson*' (http://www.barefoothippie.com)
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  3. that's beautiful!

    has the quick release ever quickly released? i think i simple rubber
    ring type to hold it to the crankdealy would act as a safety device (is
    a safety device even needed?)

    do you plan on mass producing these?

    or semi-mass producing them?

    or taking orders?

    --
    Brian MacKenzie

    Justonewheel: 'Just put the new uni together in the driveway stopped to
    move the car and ran over the uni.'

    DVD now available: 'Training Wheel Not Required'
    (http://www.LBMmultimedia.com/videos/TWNR_uniTV.wmv)
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  4. Can we see some pictures?

    --
    madmattunipro

    Quoted message said:

    <>Unicycle For Christ<><


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  5. madmattunipro said:

    Can we see some pictures?

    There's a video linked in Al's post.

    --
    bmemike

    I dub thee Sir Phobos, Knight of Mars, beater of ass. Be a hitter, babe.
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  6. Supremely AWESOME design! I'm eager to hear how this develops over time
    and how it holds up after an extended period of riding.

    I don't believe an accidental quick release would be too catastrophic
    on this thing... I mean, the pedals aren't going to just fall off, or
    will they?

    The one drawback I see to this is... those quick-release levers look
    HUNGRY for a shoelace or something else to snag...

    --
    maestro8

    Those are my principles. If you don't like those, I have others. --
    Groucho Marx
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  7. What a cool looking setup, Al. Are the joints serrated so that they can
    be indexed and locked somewhat or do you just eyeball the settings to
    get the left and right crank length equal?

    --
    harper

    -Greg Harper

    B L U E S H I F T

    *jc is the only main man. there can be no other.*

    This is still my nth post....*AWESOME!!!*

    Quoted message said:

    <>UNICYCLING FOR A FISH<><


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  8. Oops, maybe I should take a look at that. Ha ha.

    --
    madmattunipro

    Quoted message said:

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  9. So... have you tried riding with one side at 120 and the other at 165
    yet?:p

    --
    underdog

    'I tell you, we are here on Earth to fart around, and don't let anybody
    tell you different' - Kurt Vonnegut
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  10. underdog said:

    So... have you tried riding with one side at 120 and the other at 165
    yet?:p

    i rode a coker with 110 on the right and 175 on the left, it's actually
    pretty easy

    --
    Brian MacKenzie

    Justonewheel: 'Just put the new uni together in the driveway stopped to
    move the car and ran over the uni.'

    DVD now available: 'Training Wheel Not Required'
    (http://www.LBMmultimedia.com/videos/TWNR_uniTV.wmv)
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  11. harper said:

    What a cool looking setup, Al. Are the joints serrated?

    The joint is a hex shaft that inserts into a 13/16" 12 point socket.
    There are 7 settings 115,120, 130,145, 160 & 165mm. The length
    incriments are not evenly spaced because the crazy arm rotates in
    30deg. incriments.

    I have the release levers laying back so if they snag they will be
    pulled closed, not open. A big fat rubber band would'nt be a bad idea
    though.
    I have intentionaly ridden with the levers partialy loostened to see it
    they would walk out. They squeaked like crazy but after 2 1/4 miles
    were still fully inserted. So there would be plenty of warning before a
    catastrophic pedal detachment would happen.

    As for production, I have given up on the Idea that I can make my
    fortune welding together unicycles. After the 30 mile Tour de Cure ride
    Ill post how they are holding up. And if there is some interest I may
    batch up a couple of sets.

    --
    al_lieffring

    sola rota Ya'll
    Al Lieffring :O)
    'Al's Unicycling Club'
    (http://sports.groups.yahoo.com/group/alsunicyclingclub/)
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  12. al_lieffring said:

    The joint is a hex shaft that inserts into a 13/16" 12 point socket.
    There are 7 settings 115,120, 130,145, 160 & 165mm. The length
    incriments are not evenly spaced because the crazy arm rotates in
    30deg. incriments.

    I have the release levers laying back so if they snag they will be
    pulled closed, not open. A big fat rubber band would'nt be a bad idea
    though.
    I have intentionaly ridden with the levers partialy loostened to see it
    they would walk out. They squeaked like crazy but after 2 1/4 miles
    were still fully inserted. So there would be plenty of warning before a
    catastrophic pedal detachment would happen.

    That's even stronger than serrated faces and certainly more clever.

    --
    harper

    -Greg Harper

    B L U E S H I F T

    *jc is the only main man. there can be no other.*

    This is still my nth post....*AWESOME!!!*

    Quoted message said:

    <>UNICYCLING FOR A FISH<><


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  13. Ingenious! Simple and effective - what good design is all about in my
    book!

    --
    s7ev0

    DARWIN LOVES YOU

    The best things in life aren't things

    -Avatar courtesy of Loosemoose. -
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  14. sweet dude! ypu made them yourself? thats awsome! i wanna learn to
    fabricate stuff someday.

    good luck!
    Riley

    --
    manon1wheel

    Riley
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    travelling forwards from 5' up and hit the concrete with my tailbone
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  15. by the way... you should get it a copyright on that!

    --
    manon1wheel

    Riley
    ------------------------------------------------------------------------
    James_Potter-
    I fall with my upper body travelling backwards and my lower body
    travelling forwards from 5' up and hit the concrete with my tailbone
    and right elbow. It hurt, but I found it quite funny.
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  16. those are a really cool idea, i definately buy some

    Chase

    --
    Unitik908

    All hail the exhaulted Sigpoose, for he is forever king...
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    YAMS

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