Ask Sword

  Chapter 85 The way forward

"What?!"

  Di Wu didn't hear Li Ang's words clearly, so he lowered his head and shouted.

   Li Ang shouted loudly: "All the jet holes are in groups of two! Find a way to grab the hollow metal plates above the holes on both sides, switch them on and off in turn, repeat several times, maybe you can stop the blast!"

   "How are you"

  Di Wu's voice was covered by the wind. He glanced at the people who were struggling to support, gritted his teeth, held up the shield by himself, moved forward, and came to the side of Zhu Yuyin.

  Following Li Ang's instructions, he squatted on the ground and opened the closed hollow metal plate, and pulled down a metal plate next to it.

  Same as before, the second metal plate was pulled up, accompanied by a rolling sound, the wind first weakened and then strengthened.

  After repeating more than ten times, in the space behind the metal plate, the sound of something breaking suddenly sounded,

   The holes corresponding to the two metal plates are no longer gushing out wind.

'efficient! '

  Di Wu stared in astonishment, and waved to the rest of the people on the ground. They crawled forward, and continued to close the second, third, and fourth groups of Gang Qi channels.

  After a quarter and a half, all the gas passages close to the surface were closed, and the vortex lingering in the hall also weakened a lot. Only the place under the dome still had the vortex left.

  The people who escaped from the dead pulled off the exhausted Zhangdao Guirong respirator, lay on the ground panting heavily,

  Di Wu, with wounds all over his face and body, approached, cupped his hands at Li Ang, and said respectfully, "Mr. Li Xiaolang, what's wrong with you?"

   "How do you know that switching the hollow metal plate repeatedly can close the gas channel?"

  Zhu Yuyin, who was also slightly injured, walked over and asked directly.

   Li Ang glanced at him, and did not answer directly, but said slowly: "Have you ever driven a big boat on the river?"

  Zhu Yuyin was taken aback when he heard the words, "What?"

   "If you have a lot of experience in sailing, you should know that two ships cannot sail too close side by side in still or flowing water—

  Once this happens, the two ships approach each other uncontrollably and collide.

  If the two ships are sailing close together, the situation will be even more dangerous. The rear ship will collide with the front ship under the action of the current. "

   Li Ang said casually, and said silently in his heart, in water or air flow, if the speed is small, the pressure will be high, and if the speed is high, the pressure will be small—this is the basic theory in fluid mechanics, Bernoulli's principle.

  If two balloons are hung on a rope, close to each other but separated by a certain distance, when blowing towards the middle, the two balloons will approach and collide due to the fast airflow in the middle and low pressure.

  In the memory of the foreign world, the warning yellow line drawn on the high-speed rail platform is also the same principle-if you approach a high-speed train, you will be "pushed" towards the train by the suddenly reduced air pressure, causing an accident.

   "Those holes work basically the same way.

  Look carefully at the holes on the wall, they are all in groups of two, with a hollow metal plate above them.

  When a metal plate was closed, the wind was weak at first and then strong with the sound of Gululu in the mountain wall. The adjacent holes no longer let out the wind. "

   Li Ang said casually: "The wind changed after the sound of rolling. I guess, two adjacent holes each have an air intake channel.

  The two passages converge in a chamber and lead to the source of the Astral Wind. "

   Li Ang casually drew a "丄"-shaped schematic diagram on the ground, and said: "In the depression of the chamber, there is a spherical object—probably some kind of solid stone ball or iron ball.

  The object is located in the recess of the chamber and does not usually move.

  When the left hollow metal plate is closed, the airflow in the chamber will preferentially flow out from the hole on the right.

  The airflow on the right side of the chamber accelerates, generating force, as if 'sucking' the stone ball up, rolling and blocking the airflow channel leading to the hole on the right side.

  At this time, the airflow in the left hole is blocked because of the weakening—that is, the initial period of no wind.

  But soon, because the airflow is still entering the chamber continuously,

  The hole on the right has been blocked by stone balls, so the remaining air can only go to the hole on the left to flow out, causing the gas flow in the hole on the left to increase instead of decrease.

   Simply speaking, the stone ball in the chamber is a direction selector. Whichever side is blocked, the airflow on that side will be enhanced.

   What I asked Di Wu to do was actually to let the stone ball roll back and forth in the chamber, destroy the stone ball with aura, block the airflow channels on both sides, and reduce the air output from both sides. "

  Di Wu and others felt that they understood, but they didn’t.

  Li Ang glanced at Zhu Yuyin and said, "Of course, your method of changing the position of the pattern according to the sixty-four hexagrams may also be effective.

  In short, as long as you can survive.

  However, because in each chamber, the stone **** may be further shattered at any time, causing the wind to regenerate.

  Better act as soon as possible. "

  Hearing Li Ang's words, Jiao Cheng pursed his lips tightly and stood up from the ground.

  The Dragon-Breaking Stone at the entrance of the tunnel is indestructible. Several strong men with tattoos and two sword repairmen tried it. It was possible to chisel it, but the time it took is unknown.

  And the melting soil talisman they brought was also quite slow to take effect.

   After thinking for a while, Jiao Cheng left the five of them in place, and continued to use the melting soil talisman to melt the rock formations around the Dragon-breaking Stone, making sure to find a way out when the wind regenerated.

  The remaining people went to the center of the hall, and found the bronze door in the middle of the hall, embedded in a rotatable ring,

   After prying open the bronze door, he didn't see the stairs leading down, but a thick, dark liquid with a pungent smell.

   "Is this... stone fat?"

  Jiao Cheng was astonished, took the bamboo pole handed over by his hand, inserted it into the stone resin, that is, the oil layer, and stirred it.

  Petroleum is viscous, there is no exit, and there are no hidden compartments.

  The thing under the bronze door is really just a pool of oil.

   "Where is the road?"

  Jiao Cheng clenched his fists and looked around.

  The karst cave hall has only mountain walls, without any obstacles. Judging from the poems on the sword marks on the dome, it is undoubtedly written by the exiled immortal.

   But what about the most critical path?

  Jiao Cheng asked his subordinates to look carefully for traces around them, and tried to push the ring around the bronze door, but doing so could only make the oil pool rotate.

   "Could it be possible to ignite the asphalt in the pool?"

  Jiao Cheng muttered to himself, but still couldn't make up his mind.

  Petroleum is flammable and difficult to extinguish. If you ignite it rashly, you don't know what the consequences will be.

  “.”

  Li Ang looked up at the dome, and suddenly asked, "Is the one on the dome amber?"

"Um?"

  Jiao Cheng and others looked up following Li Ang's gaze, and saw a brownish-yellow light flickering faintly on the dome above the bronze door, like a ball of amber, with a long strip of iron chain shadow condensed in the middle.

   "If the road is on the dome, should the stone pool be ignited to melt the amber above?"

  Li Ang estimated the distance to the dome and the influence of the upper wind, and suddenly realized the role of the rotatable ring around the oil pool, and murmured: "So it is like this"

  (end of this chapter)