Chapter 257 (1/2)

Can external spin serve be realized in reality?

From today's domestic and foreign major tennis professional competitions, only a few top professional players can play the kind of service effect in animation.

Outside spin serve, in the professional terminology of tennis, is called the side inside up spin serve!

To put it simply, it's a general serve plus a huge spin, so that after a strong spin on the ground, it suddenly bounces to the opponent's face.

Of course, it is almost impossible to play the kind of great power in animation. The tennis itself is spinning. If combined with strong strength, even Nadal, the super spinning maniac, can't control the direction of tennis. In case a bull force out spin serve, directly be sent out of the bounds, that's funny!

In fact, the external spin serve in the field is generally a deterrent to the enemy.

Let the opponent know how strong you are, even if you can serve such a tricky service.

If you can't get it, it's better to serve honestly.

And Cheng Nuo, who is determined to become the ”Prince of tennis”. The tennis prince is the only way to serve, he must show some.

…………

The height of the tennis ball is 2.58M, the diameter is 2.541cm, the weight is 56.28g, and the elastic deformation is 0.559cm

The jumping height is 20.35cm, the swing direction is 45.58 degrees north by East, and the force is 154.26n

Data flow in Cheng Nuo's eyes.

A set of data, combined into the best hitting plan.

The onlookers just see that Cheng Nuo throws the tennis ball high with his left hand. Then, the whole body jumps up, the toes off the ground, and the right hand swings the racket.

The racket hit the tennis ball head on.

Like an instant shell, the tennis ball shoots at the opposite court at a speed that is hard to catch by the naked eye.

The ball speed is 150.25 kmh and the speed is 5.84 rpm

Expected landing location: 10.28 m, 15.68 degrees south by West.

Estimated landing time: 0.85 seconds!

Perfect serve!

Cheng Nuo eyes to see this set of data, also can't help but to express satisfaction with the external spin serve.

In reality, the reason why the top professional players can not play the perfect strength of the external spin serve, nothing more than can not guarantee that tennis has a very high speed, but also can accurately control the direction of the ball.

But these, for Cheng Nuo, who can accurately grasp the data, does not seem to be a problem.

So

In the real world, the first perfect external spin serve appeared in a small college team selection competition on Tsinghua campus!

Bang!

All the onlookers felt was a flash of green light before their eyes,

and then there was the heavy crash sound of the tennis ball hitting the ground.

The spinning tennis ball, after hitting the ground, did not stop spinning.

On the contrary, after friction with the ground for a few seconds, with a strong rotating force, it bounces in a certain direction.

And the tennis rebound direction, is Cheng Nuo's opponent, the direction of the boy with glasses standing.

And he There's no time to dodge.

Whew!

The tennis ball flew past his frame. Distance, less than one centimeter.

These data are calculated by Cheng Nuo, and the error is very small.

Whoo!

Wearing glasses boy breath, forehead, has exuded fine sweat.

He looked up and looked at Cheng Nuo with a strong shock in his eyes.

”Spin serve! It's a spin out serve

Among the onlookers, a sophomore boy pointed to Cheng Nuo in a terrified voice.