The difference between a rocket and an artillery shell is that it is propelled by a rocket engine to fly towards the target. This seems to mean that the flight of the rocket is irregular, so it is impossible to grasp its flight trajectory, let alone its impact point.
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To solve this problem, the modern approach is to compile a rocket launch table.
To put it simply, it is to obtain data such as the bullet resistance coefficient, charge temperature correction coefficient, and dynamic thrust through test firings. Then, based on these data, external environmental factors such as wind force, wind direction, air pressure, etc. are added to conduct multiple test firings.
, and then input the test results into the computer as a reference. During wartime, you can quickly obtain more accurate elements and launch them towards the target.
But this method first requires advanced measuring instruments. The most basic one is to use radar to monitor changes in flight speed and direction in real time.
On the other hand, a large number of rockets are required. Any one of the projectile drag coefficients requires nearly a hundred rockets. The entire experiment will consume at least thousands of rockets.
The Eighth Route Army was obviously unable to complete this test. It had no equipment, no time, and no ammunition.
So we can only use the crudest method... set up observation points along the rocket route and roughly calculate the speed and distance using angle and time.
All these tasks were completed by Su Xin, so Wang Xuexin gave the right of interpretation to Su Xin.
Su Xin understood, she took out the notebook she carried and opened it, handed it to Laojiu, and said: "Comrade, according to the observations of our two experiments, the fuel of the rocket will be completely burned out in about one and a half seconds.
, the active stage speed increases from about 34 meters/second to the maximum speed of about 372 meters/second, flying about 400 meters, and then enters the passive stage and relies on inertia to fly to the target!"
Laojiu was confused as he listened. Those "active segments", "passive segments", and "inertia" were all things he had never heard of.
Wang Xuexin explained: "Let's put it this way, if we shoot a maximum range of 6 kilometers, the rocket will burn out after flying 400 meters, and then the calculation method is the same as the artillery shell, just because the rocket is in the air at that time, the angle will be
Something is different!”
Laojiu said "Oh": "That makes it clear!"
Then he nodded slowly: "If only the first four hundred meters cannot be calculated, maybe we can roughly grasp its rules!"
"Yes, yes!" Wang Xuexin said: "What we want is to roughly grasp its laws!"
For rockets, it is almost impossible to accurately grasp its laws, as there are too many uncertain factors.
But this does not mean that you cannot master its rules.
Otherwise, how can we hit the target?
What Zhu Yuan is used to fight?
How to correct it if it's not accurate?
"Besides, I'm thinking about it!" Wang Xuexin said, "Should we have a few radio stations..."
"Radio station?" Li Yunlong asked in confusion: "What does rocket launchers have to do with radio stations?"
No wonder Li Yunlong found it strange that the radio was not a cheap thing for the Eighth Route Army. It was worth a donkey cart and cost at least one hundred yuan in border currency.
At this time, only the regiment level of the Eighth Route Army could barely equip radio stations. But now Wang Xuexin has to equip these rocket launchers with radio stations. How many rocket launchers do he need to equip each one?
Zhao Gang and Laojiu on the side nodded and understood.
"Captain!" Wang Xuexin explained: "When we were firing 50 cannons on the reverse slope fortifications, weren't there soldiers on the ridge waving flags to tell the gunners whether the fire was accurate?"
Li Yunlong said "Oh": "That makes sense. The rocket launcher can hit six kilometers. If you wave a small flag, you can't see it. You can only use the radio to contact us!"
The Eighth Route Army's artillery has not exceeded one kilometer so far, so this is the first time this problem has arisen.
Li Yunlong nodded heavily: "It must be matched! It's best to be matched with horses, so that you can quickly reach the destination and guide the rocket launcher to blow up the damn thing!"
Zhang Wanhe said: "Of course you have to say that you are worthy. If you are worthy, won't we all belong to the independent group?"
Everyone burst into laughter.
Then, rocket launcher training was carried out in two aspects: artillery operation and observer cooperation.
There are three rocket launchers assigned to the independent regiment.
Li Yunlong brought five cars, three of which were used to hold rocket launchers and two of which were used to hold ammunition.
In fact, each rocket launcher should be accompanied by an ammunition truck, so that dispatch can be minimized during wartime.
But at this time, ammunition production had not caught up, and the arsenal had to rush for more than ten days to produce more than fifty rounds. It was a waste to transport such a small amount of ammunition in three trucks.
Wang Xuexin's requirement for the radio station is five: three of them are assigned to a small team of artillery observers to go out for reconnaissance in three directions, one cannon pointer is used for communication, and the other one is reserved for emergencies... After all, rocket launchers are...
Without artillery observer correction, it is almost equivalent to blind typing without eyes and ears, and one must be kept as a backup.
Originally, Zhang Wanhe was a little worried. Now is a difficult period. It is usually not easy to request a radio station. Now he has to provide five radio stations at once. Can the chief agree?
Unexpectedly, the commander was very supportive: "You have to cooperate. You can't save the war! We save it now. The price we have to pay for fighting is the blood and lives of the soldiers, or even the failure of the entire battle!"
This is the leader's personality. He has extremely strict requirements for others and himself in life, but he is very willing to do anything related to the war. It can almost be said that everything is for fighting and victory.
Radio stations are not easy to obtain either.
Although the banknote printing machine had already been transported to the base area at this time... the printing equipment did not dare to be too close to the front line, so it was transported to the rear. The printed counterfeit banknotes were then transported to the front line in batches and intelligence personnel cooperated with various ministries to bring them into enemy-occupied areas for shopping.
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However, in wartime, urgently needed military supplies such as radio stations are often not available simply by buying them. Intelligence personnel need to steal or buy parts from various places and then assemble them. Many of these intelligence personnel even have to pay the price with their lives.
In the end, Li Yunlong handled most of these radio stations...
Even though this guy is smacking his lips, he has some sense in business.
He first went to the Japanese to exchange the China Reserve Certificates for silver dollars.
Since silver coins are banned in Chongqing, they have limited circulation and are inconvenient to use in enemy-occupied areas. Many people in enemy-occupied areas are willing to exchange them.
Then Li Yunlong took the exchanged silver coins to the area controlled by the stubborn army and used them to bribe the stubborn army...
In the areas controlled by the stubborn army, although the official does not recognize silver coins, the people do, and with the depreciation of the currency, this thing is also regarded as a treasure that can preserve its value, so many people are willing to exchange it.
Li Yunlong's trick is actually to "smuggle" the China Reserve Bonds that cannot be used in the areas controlled by the stubborn troops and "smuggle" them into the areas controlled by the stubborn troops.
It is much easier to get radio stations from the "double-gun" unit of the stubborn army. They can sell the radio stations in their own army just for the sake of smoking.
Therefore, Li Yunlong got three of them in one go, all of which were obtained through "trading". Not only were they risk-free and original, but there were also follow-up...