The heavy hull of the boat dragged across the sand, and the wooden planks and the sand squeezed made a subtle grinding sound, crumbling small grains of sand.

White foam washes over the shore and touches the white wooden hull and wets it into a dark gray. The resistance became lighter and lighter, and Bi Fang pushed the canoe into the sea completely.

Two connected boats float on the surface of the sea, discharging the incoming waves, and the water gushes out through the gap between the connecting platforms.

Seagulls flying over the skyline with sparkling waves. Above the mast, the string fluttered in the wind and writhed like a wild snake. Today is a rare windy day.

As an island, it would not have formed a temperature difference, and there was a sea and land breeze, but Easter Island was too big, and the vast sea breeze rushed from thousands of kilometers of flat sea to land, mighty and mighty.

As a canoe with sails, it is not suitable for going to sea, but Bi Fang uses a Latin spinnaker, and as a professional survival expert, he should use a spinnaker to sail against the wind!

"Are you ready?"

The audience responded enthusiastically to the familiar opening remarks, which had already livened up the whole venue, and there was no need to do more action, and a large number of barrages flooded the live broadcast room.

[Ready!] [Yes, Captain Bi Fang.] [It's too quiet, so quiet, how can you drive a warship?]

Everyone looked at Bi Fang expectantly. Tourists on the shore stand on tiptoe and hold up their mobile phones to take pictures. The audience sent gifts and barrages.

Just when everyone thought that the show was about to begin, Bi Fang suddenly grinned: "Who lives in the big pineapple in the deep sea?"

Everyone was stunned, and they didn't understand why Bi Fang suddenly said such a sentence. But the quick response immediately hit the barrage in response. [It's SpongeBob SquarePants!]

[No, it's Captain Bi Fang!] [Dirt~~~] [too many elements]

[The next sentence is Fang Fang Huang Huang stretches freely!]

The sudden joke made the tense atmosphere a little more relaxed and pleasant." Fang Fang Huang Huang stretches freely!" [SpongeBob SquarePants!]

"If adventure is your desire." [SpongeBob SquarePants!]

Bi Fang stepped on the sea water and jumped onto the platform, hitting the hull of the boat with a wooden stick, making a unique bang sound, like some kind of unique prelude.

"Then knock on the deck and let the big fish get out of the way!"

The canoe rises and falls with the waves, Bi Fang stretches out his right arm, wraps around the hemp rope a few times, and pulls it hard from top to bottom.

The hemp rope rubbed against the wooden pole rapidly, making a violent twitching sound." Whoa!" The pure white canvas was pulled up, and the wind instantly swelled the sails.

Bi Fang pulled the rope and jumped onto the aircraft carrier, adjusted the direction of the sail, and the whole spinnaker split straight through the wind like a sharp blade.

The sudden weight caused the aircraft carrier to sink sharply, and then bounced violently under the support of the Viking and buoyancy, bringing up a large amount of seawater.

The smooth arms pull the textured rope, and the cold sea water splashes on the bare chest, which is freehand.

The spinnaker that cuts through the wind is deflated before and after, just like the huge lift of an airplane wing acting on the canoe, swinging the sea water and speeding forward.

"Rush!" Come on!"" Easter Island will record the moment!"

There are people on the shore who shout, cheer, scream, the sound is grand, but it is infinitely stretched and far away.

The canoe was moving faster and faster, and the cheers behind it were getting quieter and quieter, and when I looked back, it was already faint.

Bi Fang laughed heartily and constantly adjusted the sails, checking the direction of the wind according to the direction of the ropes on the mast, always keeping the sailboat in the position of the most lift or thrust.

This is also where the driver's skills are tested the most. [Rush Rush Rush!]

[I used to watch the sailing championship, I felt that the giant was fucking handsome, and I always had a dream, that is, to sail a boat across the big lakes and oceans, but I never had the opportunity, and watching the live broadcast here can be regarded as a dream in disguise (crying)]

[Anyway, why can you move forward even against the wind...]

[Earlier, I didn't learn physics well at first glance, and it is obvious that this is the basic knowledge of quantum mechanics]

[I don't read much, don't lie to me]

[Fifteen centimeters without a head is given to the anchor yacht*1 - Fang Shen is so handsome!]

[The little bottle with a long beard is given to the anchor's big bones *66 - this pecs, hellish biceps, hellish shark gills, crazy licking]

"It's easy." After simply maintaining stability, Bi Fang fixed the rope and tied it to the mast to take the time to look at the barrage, "There are roughly two main types of ways for the sail to gain force, that is, forward blowing and tangential blowing."

"Forward blowing is well understood, that is, it captures the impact of the wind directly on the back of the sail and then pushes the boat forward, which is the action and reaction force of Newton."

"When sailing downwind, the sail is in a 'stretched' shape, and the larger the sail area, the greater the wind thrust, so the sails, including square sails and triangles, are very suitable for downwind sailing."

"The principle is simple, Newton's third law of action and reaction."

"The wind coming from the side direction also produces thrust when it reflects from the back of the sail, as long as the direction is from the back, no matter how it is tilted, it can provide a certain amount of thrust, and here is the tangential force that is generated, pulling the boat forward, and those who have studied force analysis should know it."

"But it's more complicated to use headwinds, using the Coenda effect and the Bernoulli effect."

[I'm sorry, I graduated from elementary school, what are these two]

[Fortunately, I studied fluid mechanics in college, otherwise I really don't understand (dog head)] [Master of Physics: Fang, online]

[Teacher Fang's class has started, the child is not good at physics, most of them are watching less live broadcasts, just take a beating]

"According to Coenda's theorem, when a gas or liquid enters in a tangential way to this surface, it will flow along a convex surface. And the laminar flow along the surface will continue to adhere to the same surface."

"This air flow that deviates from the straight line creates a force from the sail along the arc and the result is a force perpendicular to the sail. This force is mainly used by modern wing sails."

Fix the rope and sit inside the Viking.

"Whereas, according to the Bernoulli effect, when the wind blows tangentially across both sides of the sail, the air flow from the previous face passes through a curved surface, and then combines with the air flow from the latter side again to flow backward as a chord, then the rapid air flow in front of the convex side will reduce its internal pressure relative to the other face."

"The Bernoulli effect is a part of fluid mechanics, which is generally only found in university courses, so you may be relatively unfamiliar with it, but you should know more about its case, that is, the pressure difference produces a 'lift' perpendicular to the sail - that is, how the wing of an aircraft works."

[I know this, junior high school physics (covering face)] [Finally seeing familiar content] [In short, you can fly even against the wind, right]

"It's not that exaggerated, basically the side headwind is fine, but the positive and headwind is theoretically not good, but the complete positive and headwind is not common in actual sailing."

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