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Thread: Planing

  1. #221
    Join Date
    Aug 2008
    Location
    Flagstaff, Arizona
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    Default Re: Planing

    Quote Originally Posted by tbonefitz View Post
    Hey everyone, so, since this thread lives, I asked a buddy of mine about this. He's a mechanical engineer who does material stress with F-16s and F-15's. I explained all this to him, along with the theories. He then used lots of big words and math to explain it back to me. He then almost immediately knew how to actually test these theories. He started explaining a series of experiments on a bike outfitted with strain gauges on all the tubes - multiple strain gauges per tube. He immediately picked up on e-Ritchie's assertion that the frame was merely one part of a big system, and that if we're only talking about the frame, we'd need to isolate it in a particular way. Needless to say, if anyone wants hard facts on this, the actual hard facts are within reach - for a price. He figured that his company could do it, no problem, but not for free.

    He did a bunch of calculations on the back of a napkin and seemed to think through stored energy due to the flex of the frame was negligible. He did, however, completely understand the concept that a stiffer frame would feel more tiring--exactly what Jan felt. It has to do with the power smoothing of the flexible bike. Again, strain gauges, math on a napkin, and this could be verified as well.

    So, who wants to pony up $10k or so to figure this out?

    Keith Fitzgerald
    No need.

    The answer is 42.


    - Garro.
    Steve Garro, Coconino Cycles.
    Frames & Bicycles built to measure and Custom wheels
    Hecho en Flagstaff, Arizona desde 2003
    www.coconinocycles.com
    www.coconinocycles.blogspot.com

  2. #222
    Join Date
    Sep 2014
    Location
    Stow, MA
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    Default Re: Planing

    The truth comes out: Douglas Adams is a 650b fan...
    Guy Washburn

  3. #223
    Join Date
    Aug 2008
    Location
    Flagstaff, Arizona
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    Default Re: Planing

    Quote Originally Posted by guido View Post
    The truth comes out: Douglas Adams is a 650b fan...
    As if there was ever any doubt?

    Not to mention the damping effect of your towel.



    - Garro.
    Steve Garro, Coconino Cycles.
    Frames & Bicycles built to measure and Custom wheels
    Hecho en Flagstaff, Arizona desde 2003
    www.coconinocycles.com
    www.coconinocycles.blogspot.com

  4. #224
    Join Date
    May 2008
    Location
    DC
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    Default Re: Planing

    I gotta stop reading this d@mn thread.

    AntiPeril glasses on.

  5. #225
    Join Date
    Jun 2008
    Location
    South of No North
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    Default Re: Planing

    Quote Originally Posted by Too Tall View Post
    I gotta stop reading this d@mn thread.

    AntiPeril glasses on.
    Didnt Luxottica aquire AntiPeril?



    William Threadgill
     

  6. #226
    Join Date
    May 2008
    Location
    DC
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    Default Re: Planing

    Quote Originally Posted by happycampyer View Post
    Didnt Luxottica aquire AntiPeril?



    William Threadgill
    laugh.gif

  7. #227
    Join Date
    Sep 2011
    Location
    Middle GA
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    5,279
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    Default Re: Planing

    Quote Originally Posted by Too Tall View Post
    I gotta stop reading this d@mn thread.

    AntiPeril glasses on.
    Don't Panic
    Dustin Gaddis
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