Perhaps it is not difficult to fly a fighter plane at low altitude, fly along the Luliang Mountains, or even launch rockets towards Linfen Airport.
but……
It is difficult to do this and hit Linfen Airport in the dark night, especially when flying along the Luliang Mountains at low altitude. If you are not careful, the plane will be destroyed and everyone will be killed.
And everything must be completed without test flight or test firing, that is, in one step... Major Doug knows very well that this is almost a fantasy.
However, Wang Xuexin was already prepared for this. He said: "So I lowered the difficulty!"
"What do you mean?" Major Doug asked in confusion. Whether to reduce the difficulty should be decided by pilots like them. What can Wang Xuexin do?
But Wang Xuexin really has a way. He replied: "You will see fires burning on the ground. There will be one every few miles. You just need to keep a high altitude along the fires... That is a safe path."
route!”
Major Doug said "Oh" and nodded. This was indeed a solution. He almost forgot that the west of Luliang Mountain was the territory of the Eighth Route Army. The Eighth Route Army could have surveyed a route in advance and used fires to guide it.
And because these fires are on the west side of the Luliang Mountains, even if they are lit, they will not attract the attention of the Japanese on the east side of the mountains.
However……
"What about the rockets?" Major Doug said: "Without test firing, we don't even know how far it can hit!"
"I will solve this problem!" Wang Xuexin replied: "Although we can't test-fire on the plane, it doesn't mean we can't test-fire on the ground!"
"But this is completely different!" Major Doug looked at Wang Xuexin with incredible eyes: "There is height and speed on the plane..."
But before he finished speaking, Major Doug reacted: "Oh, you mean to transport the rockets to the mountain for test firing?"
"Yes!" Wang Xuexin pointed at the Luliang Mountains on the map and said, "The highest peak of Luliang Mountain is more than 2,000 meters. We can test fire at any height within 2,000 meters. This is probably the same as when an aircraft is at a high altitude.
There’s not much difference in launching, right?”
"A very smart idea!" Major Doug glanced at Wang Xuexin unexpectedly and replied: "The difference is that the aircraft has speed but the test launch on the mountain does not. But we can calculate this distance!"
This is a simple physics question. One is an object thrown with initial velocity, and the other is without initial velocity.
These can be calculated to arrive at a very definite number without the need for test firing.
What is uncertain is the thrust, wind resistance, shape influence of the rocket itself, etc. If these were in modern times, it might be possible to use a computer to input data to get the results, but without computers at this time, we can only rely on test firing to get a result.
Approximate number.
Don't look at this as just an approximate number. If you don't know this approximate number, you may have no idea where the two hundred rockets will fly out during the battle.
Major Doug felt strange that as an Eighth Route Army soldier, how could Wang Xuexin know this physics knowledge, even if it was very basic.
But thinking about it, Major Doug felt relieved... This is the knowledge that artillery should master, and the Eighth Route Army has artillery.
Therefore, Major Doug thought that he still underestimated these seemingly backward Eighth Route Army troops.
Li Yueying raised another question: "Captain Wang, but these are not enough, are they? We must also know the altitude difference with Linfen Airport. I mean, if we are launching rockets a few kilometers away!"
Wang Xuexin couldn't help but secretly praise him. Li Yueying seemed to be more thoughtful and intelligent than Major Doug. For example, Major Doug didn't expect this.
The test firing of rockets can indeed solve the problem of rocket data, but if the height difference between the fighter plane and Linfen Airport is not sure, it is also a blind man's mess.
However, this problem has also been solved.
Wang Xuexin replied: "Everything will be surveyed by then. When you cross the Luliang Mountains, you will see a direction pointed by the fire. All you have to do is fly in the direction of the fire, maintaining an altitude of 500 meters, and arrive at
Just launch the rocket when it reaches the end!"
Major Doug and Li Yueying looked at each other, each seeing shock in the other's eyes. They did not expect that Wang Xuexin would consider the plan in such detail and have already made preparations.
Although these were Wang Xuexin's intentions, they were not done by Wang Xuexin, but the chief of staff was personally responsible for the arrangements.
This preparation is neither difficult nor easy.
It's hard to say, but it is actually the set of artillery trigonometric functions, which is the knowledge that Wang Xuexin taught artillerymen. Insert a pair of rods there, and then you can calculate the height, distance and other data.
The relative height to Linfen Airport is also calculated in this way.
To put it simply, it is Luliang Mountain, and the results need to be measured in a short time, and there can be no mistakes... This thing is the basis for fighter planes to launch rockets. The rocket itself has a high wind deflection rate. If the data is more accurate,
One mistake is a huge difference, and it is the key to the success or failure of the entire plan.
Therefore, the Chief of Staff organized people to measure over and over again overnight, and fired more than thirty rounds of rockets during test firings... The Eighth Route Army did not have many rockets to begin with, so it hurt everyone to fire that one round like this, but the Staff Officer
But I think it's worth it.
Then we got a set of data, how far it can hit at a certain height, how far it can hit with speed, etc.
Finally, after repeated discussions between the chief of staff, Laojiu and other artillerymen, the altitude was set at 500 meters.
This is what Laojiu reported to Wang Xuexin: "It's too high and the offset is too large. As a result, out of 200 rounds fired, only a few of them may hit the airport!"
Wang Xuexin knew what this meant. Although the airport was very large, the wind deflection of the rocket could easily deflect it by several miles. In addition, it was fired from a high-speed aircraft. No one could guarantee where it would hit.
.
"It won't work if it's too low!" Laojiu continued: "If it's too low, the range is too short. After launching the rocket in flight, it will break into the enemy's anti-aircraft gun range before it can climb up and turn. It's too dangerous!"
"Five hundred meters is just right?" Wang Xuexin asked.
"About five hundred meters!" Laojiu replied: "Turn around immediately after the attack. Although it is possible to enter a dangerous area, the Japanese anti-aircraft guns will not have time to react! After all, we only have ten aircraft..."
Laojiu is an experienced artilleryman and is familiar with anti-aircraft artillery, so he knows that the fewer aircraft, the less likely they are to be hit by anti-aircraft artillery.