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Stone Skipping the Scientific Way

Quirk writes "National Geographic has a bit on the scientific analysis of stone skipping. Using a machine launching aluminum disks Lyderic Bocquet, a physics professor at the University of Lyon, and his colleagues discovered the 'magic angle' of 20 degrees as that required to maximize skipping. 'Jerdone Coleman McGhee of Wimberley, Texas, holds the current Guinness Book of World Records title for a 1992 toss that yielded an impressive 38 bounces across the Blanco River in central Texas'"

14 of 209 comments (clear)

  1. Umm why? by Anonymous Coward · · Score: 4, Insightful

    Why do a scientific analysis of something when you ignore the #1 variable: The Stone.

  2. wow ! by 88NoSoup4U88 · · Score: 1, Insightful
    Title of the article : 'Stone Skipping Gets Scientific'

    Can the one who asked for this please step forward, so we can publicly shoot him, and don't let any more money be spent on 'skipping stones'.

    If we _do_ plan on wasting money, then at least do a 'Icecream Eating Gets Scientific' : Im first in line to some testing for that !

    1. Re:wow ! by itsari · · Score: 2, Insightful

      The whole point of scienctific research is to find new technologies and (maybe) a use for them. You never know how this research could effect the world. Wakeboarding and surfing come to mind, as well as applications with the slashdown of spacecraft. Who knows?

  3. Proving yet again.... by mark-t · · Score: 2, Insightful

    ... that some people have entirely too much time on their hands. :)

    1. Re:Proving yet again.... by CodeMunch · · Score: 4, Insightful

      It isn't entirely uselsss. "skipping stones" was the tech behind the bouncing bombs in WWII that the Allies used to destroy German dams to deprive their industry of water. A couple weeks ago there was a great documentary about it on t.v. but i can't find a link - wuz on discovery or history channel i think - might have been one of those "dangerous jobs" shows. The bombs would bounce across the water & timed so that they would sink when they got up close to the dam and then detonate deep under water against the structure. Unfortunately, my words do not do the program justice.

  4. Stone initial conditions? by mod_parent_down · · Score: 4, Insightful
    The article mentions varying the initial conditions of release angle, velocity, angular velocity, but never talks about using different shapes of stones (discs).

    Any disc golfer or ultimate frisbee player can tell you that changing the shape or weight of your disc can very significantly affect its dynamics. It could be that they've only found the ideal release conditions for the particular disc they were testing with.

  5. Potential for this research by adept256 · · Score: 2, Insightful

    How can this be applied to real-world applications? Are they going to redesign jet-skis with this information? Or surfboards or body-boards?

    Those are a few things this research could possibly apply to, can anyone give me examples of others?

    --

    I ran a benchmark on my quantum computer, now I can't find it anywhere!
  6. Re:once again by perplexo · · Score: 2, Insightful

    Yeah, I agree to a certain extent... But isn't it the goal of science to learn more about the laws that govern the environment/world/planet/universe/what-have-you that surrounds us?

    Yes, it's kind of trivial. But there's some value in every bit of knowledge humans gain, no matter how small.

  7. Re:Dam Busting Bombs by Styx · · Score: 3, Insightful
    --
    /Styx
  8. Has anyone nominated this for an IgNobel? by Walter+Wart · · Score: 2, Insightful

    Every year the folks who put out The Annals of Improbable Research , formerly The Journal of Irreproducible Results, formerly The Worm Runner's Digest hands out ten IgNobel Prizes for scientific achievements "which can not or should not be repeated". It's sort of a Feast of Misrule for science.

    If they can give an Ig for the first MRI images showing conclusively how men and women's bits fit together during coitus and a scientific study on the optimal way to dunk a biscuit in coffee, then by G-d this deserves one too!

    --
    The man who never alters his opinion is like the stagnant water and breeds Reptiles of the Mind -- William Blake
  9. Aluminum disks? by IM6100 · · Score: 2, Insightful

    I'm sorry, but when I've skipped stones, half of the challange is finding the right flat stones. This whole experiment takes the fun out of it and turns it into a joyless exercise.

    I'd certainly hope this isn't going to lead to 'skipping stones' at the Olympics, or a standard skipping stone, produced by AMF and Wilson. Can't something just be fun without the jocks getting involved?

    --
    A Good Intro to NetBS
  10. Re:mass versus skip number by Bob+Cat+-+NYMPHS · · Score: 3, Insightful

    There is a lot of military research on skipping bombs, see PBS

  11. Re:Just wondering . . . by rilister · · Score: 2, Insightful

    Empirical science rules - I was explaining to a friend who'd never skipped stones how to hold and throw them, from, I guess, 18 years of experience.

    And if I picture how I hold the stone, I'll bet it's pretty much exactly 20degrees, with as much spin as possible. Probably what my old da' showed me. The human brain amazes me.

    --
    'This writing business. Pencils and what-not. Over-rated if you ask me. Silly stuff. Nothing in it' - Eeyore
  12. Re:A well researched problem already? by antin · · Score: 2, Insightful

    Surely they had to do similar research during WW-II when they used the bouncing bomb to blow up the dams? That would date back 60 years or so now.

    For anyone who doesn't know what I am talking about, I highly recommend the movie 'The Dam Busters' (although I cannot vouch for its accuracy).