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  • Some things just don't go together--

  • oil and water, gas and matches, tequila and fireworks.

  • So you can imagine my concern when

  • I heard about a combination of kayaking and surfing.

  • [water waves]

  • Then I saw this and thought perhaps

  • I'm worrying about nothing.

  • And then I saw this and realized I was right the first time.

  • All right.

  • If we're going to go treating a kayak like a surfboard,

  • we'd better prep on center of buoyancy and hydrodynamic drag.

  • To remain stable, a kayaker keeps the center of mass

  • directly over the kayak center of buoyancy,

  • which is in the middle of its submerged volume.

  • Traveling out to sea, it helps to keep the kayak perpendicular

  • to the waves, because turning sideways

  • can mean more hydrodynamic drag and a salty roll.

  • When catching a wave, you must ensure the nose doesn't dig

  • into the water, otherwise the resulting

  • increase in hydrodynamic drag could produce a turning effect.

  • Waves can travel hundreds of miles,

  • relentlessly building speed and power before smashing

  • into your kayak, but we should be OK-- providing

  • we remember the rules.

  • [noise]

  • Hold on a minute, should we be perpendicular to the wave

  • or parallel to it?

  • [music playing]

  • Yes, it was perpendicular.

  • By hitting the wave almost parallel

  • he presents a large surface area,

  • which leads to enough hydrodynamic drag

  • to flip the kayak.

  • [music playing]

  • We are out and ready to catch a wave.

  • I'm videoing this just in case things don't go well.

  • That's a little negative.

  • Confident, confident.

  • [noise]

  • But well-founded.

  • Good start, but here the nose digs in slows down

  • and our friends enjoy the benefits of the turning effect.

  • Now these guys have got it nice and perpendicular,

  • minimal drag.

  • Like a knife through salty butter.

  • [music playing]

  • NARRATOR: Maybe it's safer to avoid all that nasty drag

  • and head out of the surf to calm open sea.

  • There it is.

  • There it is.

  • NARRATOR: Oh, look-- a delightful little fish.

  • [music playing]

Some things just don't go together--

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B2 kayak perpendicular drag music playing wave parallel

When Watersports Become Dangerous | Science of Stupid: Ridiculous Fails

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    林宜悉 posted on 2020/11/06
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