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June 25, 2014 / by admin / Marine / 25 Comments

The Physics of Sailing – KQED QUEST

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KQED, Physics, QUEST, Sailing

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► SAILING ACROSS THE ATLANTIC (HD,Full Documentary)
Missouri River Boating – 2012

25 comments on “The Physics of Sailing – KQED QUEST”

  1. One Goat says:
    June 25, 2014 at 5:26 pm

    Square riggers can go at about 210-240 degrees from the wind (but couldn’t
    as fast at that angle) and can tack over it, however a square rigged ship
    in the form of a frigate could sometimes outrun sloops 1/50 of the size due
    to square rig being better at holding air at 0-60 degrees of the winds
    direction…

    … lets put it this way, modern sails would never give enough wind to a
    Man O War…

  2. Mike Collins says:
    June 25, 2014 at 6:08 pm

    “Square rigged ships only went in one basic direction – with the wind”
    PARDON?! Clearly, this statement is false. What did they do if the wind
    changed, or if they had to return home against the trade winds?
    In fact, square riggers, while not as efficient to wind as a modern sailing
    boat, could sail at a reasonably close angle to the wind.

  3. Kars Keizer says:
    June 25, 2014 at 6:56 pm

    modern sailboats have it only? look at the old Dutch boats, we use it
    already for age’s

  4. SuburbAllied says:
    June 25, 2014 at 7:17 pm

    7:47 watch the two sailboats and the motorboat, above the sailboat with the
    red sail – almost a bonus clip with a sail disaster, and a lesion by
    itself; How to NOT maneuver a boat in crowded situations. 

  5. Kevin Pean says:
    June 25, 2014 at 7:52 pm

    EPIC….THANKS.

  6. Zane Gifford says:
    June 25, 2014 at 8:33 pm

    “produced in high definition” only plays in 360p

  7. Karen Aitken says:
    June 25, 2014 at 9:17 pm

    I’m a major sailor. I know a lot about sailing and have been doing it for
    some time… when I first watched this video it made me laugh.

  8. quosmo1 says:
    June 25, 2014 at 10:14 pm

    what about when a boat loses its keel (on a reef or some such), they still
    sail … forwards! albeit less efficiently and somewhat dangerously, they
    still ‘work’ from a momentum perspective. their forward moment is still
    greater than the leeway, even without a keel.

    this kind of ‘lift’ theory of aerodynamics has (in the past decade) been
    quite disputed in the field of aerodynamics anyway, as many experiments
    with airfoil (wing) designs which should not create any lift according to
    this theory – do!

    so this is not the whole story. it may play a part (maybe even a large
    part) but its not a complete explanation of whats going on.

  9. bryan patterson says:
    June 25, 2014 at 10:44 pm

    Good video about generating lift from the sails and countering it with lift
    from the keel… how to shape your sail so the tell tails are flying
    instead of hanging… hmmm, reminds me I need to clean up my tell tails so
    they aren’t so fuzzy!

  10. Gilbert Pilz says:
    June 25, 2014 at 10:46 pm

    Hard to take this seriously when the first thing they say is completely
    wrong. Square-rigged ships can most certainly sail into the wind. It’s true
    that they can’t lie as close to the wind as a fore-and-aft rigged ship, but
    they can tack.There’s no way Magellan, Drake etc. could have made it around
    the world in ships that only sailed with the wind. Getting around Cape Horn
    from east to west is impossible if you can’t sail your ship into the wind.

  11. PLISKEN12 says:
    June 25, 2014 at 11:14 pm

    wishy washy kinda

  12. Disabler says:
    June 25, 2014 at 11:36 pm

    Scientists are terrible at explaining things lol

  13. Sugarsail1 says:
    June 26, 2014 at 12:19 am

    a luffing sail and a stall on an airplane wing are not aerodynamically
    equivalent.

  14. Yann Rousselot-Pailley says:
    June 26, 2014 at 12:32 am

    Comment marche un voilier ? Voilà la (les) réponse(s) !

  15. Levi Partridge says:
    June 26, 2014 at 1:07 am

    lol lucky you’re doing it somewhere warm and not somewhere freezing like
    Hamworthy (Poole, UK)

  16. Sergio.J.V. says:
    June 26, 2014 at 2:04 am

    Lift (in sails as in wings) is generated according to Newton’s 3rd:
    http://www.grc.nasa.gov/WWW/k-12/airplane/lift1.html

  17. Christopher Koffel says:
    June 26, 2014 at 3:03 am

    1:52 I was dying that that jib sheet wasn’t being pulled!

  18. Timothy Horita says:
    June 26, 2014 at 3:54 am

    Hey guys. Here’s a neat video explaining the physics of sailing into the
    wind (old square sail ships couldn’t do this)

  19. Eric Estro says:
    June 26, 2014 at 4:30 am

    Was produced in high definition “360” max…

  20. aidtry182 says:
    June 26, 2014 at 5:07 am

    I’ve always been so fascinated on how sailing ship works!!

  21. Ian Edmonds says:
    June 26, 2014 at 5:47 am

    That was fun.
    Thanks

  22. David Galamov says:
    June 26, 2014 at 6:19 am

    the most idiotic video ive ever seen!(from the eyes of a sailor).

  23. detonatorJE says:
    June 26, 2014 at 6:24 am

    Hey guys, just a note about why lift happens, this guy is chatting bull.
    Bernoullis law doesnt apply in the case of a wing (or sail). For his law to
    apply, certain assumptions must be made. firstly that the fluid has zero
    viscosity, but as we can see, the fluid ‘sticks’ to the shape of the wing,
    which is a viscous effect. secondly, that it is a steady flow. which as
    said in the video, it is not. Finally, Bernoullis theorem only applies to a
    single flow, once you talk about flows above and below a wing, its moot.

    While Bernoullis can describe some of what is happening, the fundamental
    law behind lift is newtons 3rd. watch the flow as it comes off the wing,
    its at a different angle, meaning a force was imparted on the air by the
    wing, and thus vice versa

    (im an aerospace engineering student and even people in the aero business
    get this wrong (including the most of the internet), and this isnt coming
    from me, this is coming from Dr Iain Dupere at Manchester University)

  24. Ryan Rodgers says:
    June 26, 2014 at 6:28 am

    Your model desperately l lacks sail trim. Move your jib cars back and for
    the love of god, tighten your outhaul!

  25. Dobre Octavian says:
    June 26, 2014 at 7:10 am

    this video keeled me

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