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  1. #16
    Turbo Monkey Huck Banzai's Avatar
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    Quote Originally Posted by demo 9 View Post
    thread is from 2006, might not get an answer on this one
    7 years; statute of limitations is up.

  2. #17
    Turbo Monkey demo 9's Avatar
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    I meant the op. havent seen a post from that username in a while

  3. #18
    Press Button, Receive Stupid jonKranked's Avatar
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    Quote Originally Posted by demo 9 View Post
    I meant the op. havent seen a post from that username in a while
    Last Activity:11-04-2008 11:04 AM
    set your sarcasm meter to Level 4:butt hurt

  4. #19
    Turbo Monkey WestCoastHucker's Avatar
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    stalker...

  5. #20
    Grasshopper
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    Just wondering if anything became of the ratcheting CVT project.
    ZeroMax has a ratcheting CVT that they have in production, but the output is not "uniform". The fluctuating output speed of ratcheting designs tends to produce significant vibration/pulsation issues.
    My first inclination, without seeing the design, is that it likewise, does NOT produce a uniform velocity output, but I was curious what the team had come up with.

  6. #21
    Monkey EVRAC's Avatar
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    The original Honda bike used a ratcheting cvt, and had the same issue. They solved this by using custom gears that were non-round to compensate, "rectifying" the output.
    Derailleurs suck.

  7. #22
    Press Button, Receive Stupid jonKranked's Avatar
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    heh heh.... rectified output
    set your sarcasm meter to Level 4:butt hurt

  8. #23
    Monkey TrueScotsman's Avatar
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    Anyone got any idea what ever came of the IVT gearbox by Derek Lahr? To me it seemed to show a lot of promise.

    EDIT- just found this;
    http://scholar.lib.vt.edu/theses/ava..._DF_T_2009.pdf

    Hmmm, very interesting!
    Last edited by TrueScotsman; 01-20-2013 at 04:43 PM. Reason: added link
    You can train a donkey, and it will be fast donkey, but it will never be a racehorse!!!www.descent-world.co.uk

  9. #24
    Grasshopper
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    Quote Originally Posted by TrueScotsman View Post
    Anyone got any idea what ever came of the IVT gearbox by Derek Lahr? To me it seemed to show a lot of promise.

    EDIT- just found this;
    http://scholar.lib.vt.edu/theses/ava..._DF_T_2009.pdf

    Hmmm, very interesting!
    Not much has happened with the transmission/bike Derek built to work with it since 2009. There was a senior project the following year that was supposed to get the transmission ready for actual use (harden the design etc.) but they didn't make enough progress to use it for a go-kart like they had planned. Basically Derek is too busy building robots these days to spend the proper amount of time to get the thing working in a bike. Hopefully he gets his priorities straight and finishes it at some point.

  10. #25
    used an iron once HardtailHack's Avatar
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    Haha he has a Lahr link in his sig, this was probably a scam as well.

  11. #26
    Grasshopper
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    Quote Originally Posted by HardtailHack View Post
    Haha he has a Lahr link in his sig, this was probably a scam as well.
    Lahr ≠ Lahar there chief.

  12. #27
    used an iron once HardtailHack's Avatar
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    Quote Originally Posted by monroe123 View Post
    Lahr ≠ Lahar there chief.
    Ahh yes, wish I had an excuse.
    Anyway it seems had not been seen for a while in 2010 too- http://www.ridemonkey.com/forums/f19...y-news-227811/

  13. #28
    Turbo Monkey Scrub's Avatar
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    Lahar Lahr pants on fire

  14. #29
    Turbo Monkey no skid marks's Avatar
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    Fricken Priorities.

  15. #30
    Monkey Nately27's Avatar
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    Fun to see interest in the CVT. The best video is from the fellas at pinkbike.com.

    All the work that was done is covered in my thesis, except that one patent was awarded, and a second is applied for. I am working on graduating, and would love to get into the bike biz. Have to see how the cards play out.

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