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Thread: "Long Chainey"

  1. #1
    Rat Patrol Chicago
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    "Long Chainey"

    Tired of those same-old choppers where the rider is above the fork, I designed an underslung chopper...

    It lives! This bike is finally rideable, and it's fast! The rear wheel acts as a gravity motor. It powers up hills and turns like a train. I towed a trailer 140 blocks the other day loaded with a tallchopper... I've commuted on a triple-high but never felt compelled to wear a helmet in my life, but this bike scares me enough to make me put on a nugget-bucket. It's motorcycle mass moving at motorcycle speed.



    I made the wide bottom bracket out of a pipe and two flanged bearings, then I cut a bottom-bracket spindle and welded it on 3/4" solid rod. The chain ring and crank assembly is spaced left-right with washers.

    Here's the fatback kit, looking up at the derailleur. I just made a plate so I can swap out the rear wheel if I find a single twenny-fo'.



    You can ride a passenger on the pipes:



    The headset and rear axle are set on six-dolla-holla Northern Tool pillow block bearings:



    There's some weird science going on with this underslung system...

    -when the rear wheel hits a consistent rough pattern it sets up harmonics in the fork and the front wheel skitters all over the road

    -it eats bumps and drops alive but riding down a 3/4" seam in the street will toss you on your side

    -looking at the bottom of your fork is really weird. But you don't really see the frame because you go perfectly straight such a small percentage of your ride.

    The bike's name is "Long Chainey" and it is incomplete. I still need brakes.

    please keep this thread on-topic
    Last edited by Johnny Payphone; 05-08-07 at 12:40 AM.

  2. #2
    tired donnamb's Avatar
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    How fascinating. I'd love to see it in motion, but Chicago is a really long bike ride from here.
    "Real wars of words are harder to win. They require thought, insight, precision, articulation, knowledge, and experience. They require the humility to admit when you are wrong. They recognize that the dialectic is not about making us look at you, but about us all looking together for the truth."

  3. #3
    Ride your bike xddorox's Avatar
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    Totally insane! I love it

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    Senior Member hockeyteeth's Avatar
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    Oh my god! You totally need to take some video, Johnny.

    I like the skull weld for the headset, haha.

  5. #5
    Long haired freak. wethepeople's Avatar
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    You. Are. GOD!

    "the bus came by and I got on, that's when it all began...there was Cowboy Neal at the wheel of a bus to never-ever land."


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    That's unlike anything that I've ever seen.
    Very impressive.

  7. #7
    ♋ ☮♂ ☭ ☯ -=(8)=-'s Avatar
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    =G=E=N=I=U=S=

    I wonder if a big, fat 29" MTB tire stuffed on the at rim might
    help the wandering crack problem ??

  8. #8
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    nice, I want one!

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    is nobody gunna mention how ****ty the welds are, I mean egads!
    "Inappropriate signature removed by forum administrator"

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    The Legitimiser Sammyboy's Avatar
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    I totally need to ride that. Maybe it's just me, but I can't see where the bars are? I mean, they must be above your head, at the top of the.....the.......I wanna say fork, but I'm not sure it really is! Anyway, I can't see them. Is the rear wheel braked at all?

  11. #11
    Senior Member ebow3d's Avatar
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    Very cool bike.
    A suggestion: if you put a street bike (motorbike) rear tire on, you will improve the handling a lot. That flat profile of your car tire would cause major handling/straight line problems.
    Please keep posting pics.

  12. #12
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    Quote Originally Posted by Capn ˇFUN!
    is nobody gunna mention how ****ty the welds are, I mean egads!
    I like the ones in the bottom picture, it looks like a face.

  13. #13
    Edificating dmotoguy's Avatar
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    At first I thought it was three x's..

    I dig that ish man.
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    Rat Patrol Chicago
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    Quote Originally Posted by ebow3d
    A suggestion: if you put a street bike (motorbike) rear tire on, you will improve the handling a lot. That flat profile of your car tire would cause major handling/straight line problems.
    yes, but motorcycle tires are round, and then I wouldn't have a big flat car tire on my bike, which is the whole point.

  15. #15
    Radfahrer Rincewind8's Avatar
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    Quote Originally Posted by Johnny Payphone
    yes, but motorcycle tires are round, and then I wouldn't have a big flat car tire on my bike, which is the whole point.
    You could over-inflate the car tire a little bit and get a similar effect.
    TH 1.81 (133kg*62)

  16. #16
    Edificating dmotoguy's Avatar
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    picture of you on it for scale?
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  17. #17
    gravity speed freek
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    that is AWESOME!!!!!! ya gotta post video or at least some pix of it mounted. fast eddie outty

  18. #18
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    Damn, I REALLY want to check that out.

  19. #19
    Long haired freak. wethepeople's Avatar
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    Quote Originally Posted by dmotoguy
    picture of you on it for scale?
    I hope he doesn't mind me leeching his bandwidth for this.

    "the bus came by and I got on, that's when it all began...there was Cowboy Neal at the wheel of a bus to never-ever land."


  20. #20
    el natural!
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    Now, it's just my opinion.. but...

    I think I would like it a bit more if it looked like this:



    and don't you worry about the crappy photo edit here..

  21. #21
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    Knalb-

    I think a potential problem with your redesign would come when the steerer tube snapped in half and your forward momentum drew your recumbent carcass over the severed portion like a worm onto a hook.

    Hmm. Actually, that would be pretty cool. Never mind. You get the first ride on the sport version of El Chaino.

    Eric

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    Another idea for improving the handling might be to redo the fork with more rake. There's about 18 inches of trail there. Wheel flop city.

    Wait a minute. What have I seen so far in my life to indicate that Johnny Payphone gives a pizzle about fine-tuned handling?

  23. #23
    el natural!
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    Sure, there is potential there to make it a wild ride in the event of failure, but you only live once right?

    On second thought, I would like to keep some of my lower extremities. I still think it looks better without the bar in the way, but maybe with some different material it would be less prone to snaping in half.

  24. #24
    Senior Member Sledbikes's Avatar
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    it handled well when i got scooted along on it im sure the ride is even better
    riding and pimpin again

  25. #25
    Rat Patrol Chicago
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    Quote Originally Posted by Roll-Monroe-Co
    Another idea for improving the handling might be to redo the fork with more rake. There's about 18 inches of trail there. Wheel flop city.
    That is the appropriate amount of rake for a dragster. This thing is fast and turning is mainly done by leaning. True the fork flop doesn't allow for tight turns, but all you gotta be able to do is turn around in the street, right? That's how biker gangs choose the length of their choppers.

    The other day I scraped my axle on the ground during a turn and kept on rolling!

    You have to realize this thing handles extremely well. It's quick and comfortable for long rides. It hauls trailers like they were made out of paper. I can track stand on it forever thanks to the wide wheel. Basically what it doesn't do is a) go slow or b) stop.

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