How Sails Work Or How Sailboats Sail İnto The Wind, youtube mp3 indir

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How Sails Work or How Sailboats Sail into the Wind

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Traditional sailboats can only sail with the wind behind them. But modern sailboats have sail designs that enable them to sail in any direction regardless of the wind. Except for the “no-go” zone which is about 45 degrees on either side of the wind, where it’s physically impossible to create lift no matter how to angle the sail, in which case the sailor can simply zig-zag in the direction he or she wants to go. The secret to these sail is lift. The very same force that enables airplanes to fly in the air. In fact the same concepts apply, Newton’s 3rd Law, Coanda Effect, Bernoulli’s principle, anything that applies to wings apply to sails as well.

But enough with the theory of sailing, if you want to learn how it’s actually done, check out Josh’s video here,
Learn How to Sail: A Step-by-Step guide to SAILING: https://www.kolaymp3indir.com/watch?v=WjBYRUZbU4Y

But before you go, click the like button and subscribe if you enjoyed this video.

00:00 – Intro
00:30 – How sails work like the wings of an airplane
01:22 – Hidden secret - keel
02:29 – No go zone

#sail #sailboat #lift #wings #airplanes #boats #airfoils

You’re on a sailboat and the wind is blowing from behind you. The wind will push on the sails and your boat which is attached to the mast will be propelled forward. No mystery there right? But what about when the wind blows towards you or from the side. You’d think it would be impossible for you to move forward, right? Well think again, because not only will you go forward, but set your sails right and you can sail even faster than the wind. So how do sailboats work and sail into the wind? Short answer, your sailboat is actually an airplane on its side and your sail is one of the wings raised vertically. When sailing, the sailor will adjust the sails so the wind pushed on the inside of the sail keeping it stretched tight but also at an angle so some of the wind passes along the outer side of the sail as well. This is exactly what happens on wings of an airplane. The pilot controls the angle of attack, so some of the wind pushes the wings up from below and some of the wind, by following the curvature of the upper part of the wing, pulls the wings up as a result of the Coanda effect and Newton’s 3rd Law of Motion. This resultant force is called lift, and lift is what keeps airplanes flying and sailboats sailing. However unlike the wings of an airplane where the direction of lift is vertical, in case of sails the direction is horizontal. But that’s not the end of the story, because a keen observer will have noticed that the direction of lift created by the sails, while horizontal, is at an angle to where we actually want to go. We’re missing something here. Well no need to look far, because the secret sailors like to call the “keel” is hidden right beneath us. Remember that a sailboat is actually an airplane on it’s side. The sail is one the wings and the keel is the other one, hidden under water. When lift from the sails tries to move the boat at an angle, the water, which you can think of as much denser air, pushes on one side of the keel and pulls from the other side creating lift. In this regard keels are no different from sails or wings. However, unlike wings of an airplane which create lift in the same direction, up, the wings of a sailboat creates lift in different directions. Both at an angle from where you want to go, which individually would be unhelpful, but when the effects are taken together the result is the forward propulsion we were looking for. And that’s how sailboats work and sail into the wind, except for the “no-go” zone which is about 45 degrees on either side of the wind, where it’s physically impossible to create lift no matter how you angle the sail. You obviously need magic for that. What’s not magic is the Coanda effect and how wings work using Newton’s 3rd Law of Motion. You can find out more about it here in part 1 of how wings work. Or if you’re more a Bernoulli’s principle kind of person, check out part 2 of how wings work, here.