Ye Han suddenly discovered that the air pressure from the ocean under the ice was actually not as high as expected. Two icicles were so weak, and one more icicle might not be able to hold it up.
But two sticks were enough. Although they failed to block the ice cave, the gap left was very small and the surging air flow was greatly weakened. If the original air flow was like a big river, then the current air flow is just a trickle and gentle flow.
It's almost negligible.
Ye Han was a little worried, fearing that the airflow would not be able to withstand the icicles. Once the icicles fell, the fun would be great.
But the situation was more ideal than expected. The steam from the bottom of the cave slowed down and swirled under the icicles. The water vapor slowly adsorbed on the ice, actually freezing the icicles and the ice wall together. Even the few air leakage gaps were blocked.
Frozen steam blocked it.
This was really an unexpected surprise. Ye Han first contacted the Leishan, confirmed that the communication was smooth, and then observed it for a while. Only when he was sure that the icicle would not fall down did he signal to the soldiers to start action.
The soldiers who had been prepared for a long time took action immediately, set up a hanger on the ice platform with a lower diameter, and continued to lower the drone to the bottom of the cave.
It was still eight or nine hundred kilometers away from the bottom of the cave. The drone would not be able to land for a while. Ye Han was impatient and called all the soldiers together to study how to make the drone land on the ice quickly.
Down.
After a long discussion, everyone finally came up with a practical solution: after the ice cave is sealed, there will still be a certain amount of air pressure left in the cave. If there is air, you can use a parachute, so there is no need for a winch at all.
Just throw the drone down.
The method was good, but some people immediately raised objections: the air pressure in the ice cave was too low, and the parachute area was not enough. If you just throw it down, the parachute would not have any deceleration effect at all.
"This is easy to do." Ye Han immediately thought of a way to deal with it. "Use a laser gun to make a hole in the icicle to allow the airflow to flow upward. If one doesn't work, just use two. They will definitely be able to hold the parachute."
Everyone nodded immediately, thinking this was a good idea.
The method was figured out, but without preparation in advance, there was no parachute in this damn place, and no one could find a substitute. There was a method but no conditions to implement it.
"How about opening the ice hole, letting the battleship send a batch of parachutes down, and then sealing the hole?"
Ye Han rolled his eyes helplessly: "With that time, the drones will be gone!"
"That's right!" He Lu agreed in the communication, "It's better to jump down directly with the drone in hand. It's more convenient to use the flight bag to come up when it's in the end."
Luo Qi immediately agreed: "What a great idea!"
Ye Han said angrily: "Go, go, stop talking nonsense with me here, do whatever you need to do!"
The team leader suddenly said: "Captain, if we put more holes in the icicles, wouldn't it be okay without a parachute?"
Everyone was stunned, and then suddenly came to their senses. Ye Han patted the leader of the group on the shoulder hard: "Okay, okay, Luo Qi, organize the manpower immediately. Do you know what to do?"
"I know!" Luo Qi replied immediately, "Follow me a few people!"
"I'll go!" The group leader took the initiative to stand up.
"Okay, let's go." Ye Han nodded in agreement. The group leader turned around and was about to leave when he was suddenly stopped by Ye Han, "Wait a minute!"
"Captain!" The team leader quickly stopped.
"In this way, you put the drone down first, and then punch through the icicle when it's almost to the end, do you understand?"
The team leader suddenly realized: "I understand, I understand!"
"Okay, let's go!" Ye Han said.
The group leader led his team members out of the side hole and came to the platform at the lower diameter. Everyone first nailed the fixing ropes to the ice wall, and then waited for the group leader to give the order.
The team leader took his time and directed the soldiers to hang an unfolded drone over the ice cave. Then he took out the laser gun and aimed at the top of the head with the armor fixed to ensure that it would not deviate from the target due to movement.
After that, he fired at the icicle cautiously.
A thin laser beam fell on the ice, and within a short time, a hole as thick as a finger was melted.
The steam that had stopped flowing began to flow again, and a weak air flow emerged from the bottom of the cave.
But this airflow is too weak to support the drone.
The team leader originally wanted to drill another hole, but after a moment of hesitation, he gave up the idea and instead expanded the previous hole.
As the laser beam swayed, the holes in the icicles became larger and larger, and the airflow from the depths of the ice cave became stronger and stronger, gradually reaching the standard for releasing the drone.
The soldiers immediately stopped the group leader, and after receiving the group leader's approval, they released the drones in their hands.
The drone fell lightly into the hole and quickly fell into the depths of the ice cave... The drone inevitably collided with the ice wall during the fall. In order to reduce the damage of the impact, all eight claws of the drone were opened.
Open, it protects the fuselage up and down, and the mechanical legs will cushion it no matter how it hits.
Through the signal sent back by the drone, a group leader concluded that the drone's falling speed was about seven meters per second. The speed was not slow, but it was still within the tolerance range.
The team leader breathed a sigh of relief, and after counting ten times in his mind, he put the second drone into the ice cave.
After launching seven drones in a row, the team leader stopped, looked up at the icicles above his head, cut off a fist-sized piece of ice from the ice wall a few times, and threw it upwards with force, and the ice pieces followed.
It rises along with the airflow and blocks the holes in the icicles accurately.
The airflow suddenly weakened, and the drone's falling speed suddenly increased.
The team leader sent another set of control signals into the ice cave, and the drone hanging below immediately cut off the high-strength fiber and became a free fall like the other drones.
The team leader pointed to the icicles above his head and said, "Keep an eye on it. If the airflow blows away the ice cubes, add another one right away!"
"Yes!" The soldiers agreed in unison and stayed on the platform to monitor the drone. The team leader returned to the side cave and reported the situation to Ye Han.
After Ye Han learned the details, he calculated that it would take just over six minutes for the drone to descend to the bottom of the cave. Taking into account the air resistance in the ice cave, it would take about seven and a half to eight minutes.
This speed was much faster than using a winch, so Ye Han simply stopped staying in the side hole, said "leave", personally led everyone to the platform, and monitored the position of the drone with the soldiers.
The drone fell deeper and deeper, and the light in the lens became darker and darker. Even the night vision lens could only return blurry images. In desperation, Ye Han could only give the drone a signal to turn on infrared compensation.
Turn on the light and the image returned by the drone will become clear immediately.
After waiting for a while, it was found that the drone had been falling for more than eight minutes, but there was still no sign of the end. Ye Han was muttering in his heart, wondering what went wrong.
Could it be that the ice here is particularly thick?
Ye Han was thinking about it mindlessly when a soldier suddenly exclaimed: "Here we are, I can see the water!"
