On a midsummer night, the sky is exceptionally clear.
There were cicadas chirping and frogs chirping all around, creating a peaceful and peaceful atmosphere.
A huge Kongming lantern rises slowly, like a kite, with a rope tied to the base, floating in the air in the wind.
Since the Academy of Sciences arrived in Chengdu, it has flown sky lanterns every day to measure wind speed and direction. By analyzing and sorting the collected data, it has been able to figure out the local air flow patterns in the shortest possible time.
After observing for several days, Mei Chun found that the local airflow was completely different during the day and at night, both in speed and intensity.
The terrain here is very special. It is located at the junction of the Qinghai-Tibet Plateau and the Sichuan Basin. The wind speed in the basin is slow and the temperature is relatively high. However, as you go westward, as the terrain becomes higher, the wind force will increase significantly.
In particular, the heat accumulated in the basin during the day will form a unique heat dissipation system at night. By mastering this law, through calculations, the flight path of the Kongming Lantern can be worked out.
Then based on the distance of the local positions, the flight time is calculated, the fuse buckle is set, and the fully automatic bomb-dropping drones appear.
This night, the moon was sparse and the breeze was gentle, which was a perfect opportunity to attack.
In the plateau area near Yazhou Prefecture, Uzang's army has already assembled.
Facing the continuous offensives launched by the Ming army, their lives were not easy.
There was not much money and food left from building the railway, and now it was back to the days of eating rice bran. If things went on like this, there was no need for the Ming army to attack at all, so I gave up.
King Chanhua Sangdu kept encouraging the soldiers, saying that with the Buddha's blessing, the Ming army would definitely withdraw.
However, it is enough to say this once or twice. If you say this every time, the people under your command will have become numb.
In order to stabilize the morale of the army, Sangdu racked his brains and thought every day about how to perform some miracles. After all, as the spokesperson of the Buddha, if you don't have any magical powers, why should people believe you?
That night, he came to the front line again and prepared some "miracles".
Turning the gunpowder that you have worked so hard to get into into fireworks and setting off a few in the dead of night can be regarded as the appearance of the Buddha...
"Look, what is that?"
There was a sudden commotion at the post station in the front line. Someone pointed to the sky, as if facing a powerful enemy.
"It's the Buddha who came to this world!"
Someone shouted at the top of their lungs, and the others fell to their knees in shock.
"Buddha appears, Buddha appears!"
Sangdu glanced at the fireworks behind him in confusion, and thought to himself, I haven't set them off yet, what's going on?
The moment he walked out of the camp, his whole body was stunned.
Overhead, a bright flying star hung in the sky.
What is this stuff?
Could it be a new weapon of the Ming army?
Sangdu's first reaction was to run away quickly, because the Ming army often came up with novel things, which made it difficult for people to guard against them.
However, I have never heard of anything that can fly into the sky.
Now the only advantage on our side is the steep terrain of Uzang. If the Ming army can really fly into the sky, what a hell!
Sangdu gave up the idea of escape and observed carefully for a long time. The flying star was just wandering in the sky, but there was no other movement.
Judging from this appearance, it seems to have nothing to do with the Ming army.
Could it be that...a miracle really happened?
"This is the manifestation of the Buddha!"
Regardless of whether he is right or not, let’s just say this first!
"You have all seen that with the Buddha's protection, what are you still afraid of?"
"Give me the order. Early tomorrow morning, we will switch from defense to offense and we will attack the mountain!"
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The Observer descended slowly, and the recorder inside took out the data just collected.
Measuring the wind direction and speed in the Kongming Lantern is actually very simple.
All you need is a bamboo tube or a stick wrapped with a wet towel.
After the wind blows, the windward side will dry faster and the leeward side will dry slower. You can see the North Star at night, so you can determine the wind direction.
Then by observing the speed at which the towel dries, the wind force can be determined.
I have been using this method for more than ten days, and I have basically figured out the rules of air flow above.
The main function of this light tonight is to verify whether the previous plan is accurate.
Moreover, in order to avoid alerting others, only one lamp was raised.
Bei Lin, Mei Chun and others gathered together to compare the data one by one.
Before this, they had made detailed calculations to find the best attack position based on wind direction, wind strength and other factors, and then back-calculated and verified the newly obtained data.
"Yes, everything matches!"
Beilin nodded, then looked at Mei Chun and said, "Do you have any other questions?"
Mei Chun's face was very nervous. After all, the research on weekdays was only at the theoretical level, or at most to the level of exercises, but tonight was actual combat.
War means death, and he knows exactly how powerful the bombs carried by the Kongming Lantern are.
Every time a bomb falls, someone will die.
On the way from the capital, he tried hard to convince himself that whether or not he was there, it would not affect the direction of the war. The effect of the Kongming Lantern was only to speed up the end of the war.
Fight to stop war, fight to stop fighting.
Only by beating King Chanhua thoroughly, subduing him, and beating him to the point where he knelt down and begged for mercy, could Uzang truly be included in the territory of the Ming Dynasty.
He tried hard to calm down, checked the two sets of data one by one, and then measured the position on the map.
During this process, his hands could not help but tremble.
Beilin patted him on the shoulder and said: "There are many opportunities. If there is a problem with the data, we can take action another day."
Mei Chun took a deep breath and then said: "There is no problem with the data. In half an hour, the wind direction will turn to the southeast. Then it will be the best time!"
"good!"
Beilin immediately ordered: "Listen to my order and prepare everyone!"
The order was passed on, and everyone entered a state of combat readiness.
It only took a moment to assemble the first batch of fifty Kongming lanterns.
Mei Chun closed her eyes and quietly felt the night breeze.
"Report, the wind has changed!"
A ray of breeze blew by, and Mei Chun opened her eyes and saw that the weathervane on the flagpole had changed direction.
"It's now!"
Beilin nodded and immediately ordered: "Let the Kongming Lanterns fly!"
Immediately afterwards, little flames appeared at the camp.
Fifty groups began to fly the first batch of Kongming lanterns.
In the night sky, the stars twinkled, but the hazy moonlight was a bit tragic.
On the dark earth, a Kongming lantern slowly rose and drifted to the western peaks in the wind.
Under the lamp, there was something dark hanging.
Immediately afterwards, there was the second one, the third one...
All fifty Kongming lanterns soared into the sky and gradually rose up, like stars in the sky.
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