Soon, Sun Erwei sent a telegram to his superiors to order M1 anti-aircraft guns.
But that’s not the point. The point is the observation results.
When Sun Erwei's superior, Colonel Smith, received the telegram, he replied with great interest: "It seems that the Chinese man has convinced you!"
"Yes!" Sun Erwei replied: "We thought we knew they knew our weapons, but... we actually don't, Colonel!"
With that, he reported Wang Xuexin's tactics.
After seeing this tactic, Colonel Smith agreed. He said: "It seems that we have only discovered part of the functions of these weapons. In certain specific environments, they may play unexpected roles!"
After a pause, Smith asked again: "How should I report it? Are they worthy of our assistance?"
"I'm not sure, Colonel!" Sun Erwei replied: "Their current situation is to make the best choice based on existing conditions, and they are very good at this. I don't know if they can control it once they have more equipment!"
Colonel Smith understood what Sun Erwei meant.
There are advantages to having less equipment. For example, the Eighth Route Army's tactics of using the M1 anti-aircraft gun at this time was to seize the fact that the Japanese had a clear target and predict the location of the Japanese aircraft.
But if there is too much equipment, this prediction will no longer exist, and what is needed then is formal combat.
But Sun Erwei added: "But I think they are worth trying, Colonel! I mean, they can invent these practical and unexpected tactics under such circumstances, does that mean... if there are more equipment?
, they can also invent more tactics! I’m looking forward to this!”
Sun Erwei is telling the truth. The tactics invented by Wang Xuexin are very interesting, but it is a pity that these tactics cannot be used by Yingjiang... Yingjiang has radar, so of course there is no need to use tanks to attract enemy aircraft like the Eighth Route Army.
So Sun Erwei thought, if Yingjiang can provide more assistance to the Eighth Route Army and allow Wang Xuexin to invent some modern tactics, some tactics that Yingjiang can use, will it be helpful to Yingjiang's future wars?
Colonel Smith disagreed.
"Forget it, Captain!" Smith called back: "We can't hope that a group of people who don't even have planes or warships can provide us with constructive opinions. We just want to know whether it makes sense to provide aid equipment to the Eighth Route Army!"
"Yes!" Sun Erwei replied: "I will continue to observe them!"
When Sun Erwei returned to Wang Xuexin's battalion headquarters, he did not tell Wang Xuexin about his observation. He just said lightly: "I have asked them to send twenty M1 anti-aircraft guns. Considering the urgency of your need, we will dismantle them.
Then it will be transported by air. There are also 10,000 rounds of artillery shells accompanying it, which will probably arrive in a few days!"
Wang Xuexin nodded with satisfaction, and then asked while flipping through the documents in his hand: "Can you tell me about your radar? Can it really see targets dozens of kilometers away?"
Wang Xuexin asked this just to foreshadow the fact that he would learn about radar in the future, so as not to get confused and not know how to explain it.
"Of course!" Sun Erwei nodded proudly: "This is amazing, isn't it? But I can't tell you how far it can see. It's a military secret!"
Wang Xuexin expressed his understanding.
This should indeed be a military secret. If the enemy knew the radar detection range of Eagle Sauce, they would fly at low altitude beyond this distance to avoid its detection.
However, Wang Xuexin could guess that the detection distance should be about thirty to forty kilometers.
The reason is that Sun Erwei said that they have developed an anti-aircraft gun that can shoot 25 kilometers... Without a longer detection range, the range of this anti-aircraft gun is meaningless.
"How does it work?" Wang Xuexin asked again: "I hope to know roughly its principle!"
"Let's put it this way!" Sun Erwei hesitated for a moment and tried to explain in easy-to-understand terms: "It can emit a sound wave. When this sound wave hits an object, it will be reflected back and received by the base station, so we
You can calculate the distance of the target from the received time and the speed of the sound wave!"
Wang Xuexin raised his head with interest: "You mean, how far can it detect the target?"
"You can say that!" Sun Erwei nodded.
This is not a secret. Many countries know that they also have radars, and the Japanese are no exception. However, the Japanese radar is relatively backward.
"Interesting!" Wang Xuexin laughed: "I was just thinking about the issue of anti-aircraft artillery shells. Do you think radar technology...can be used on artillery shells?"
"What do you mean?" Sun Erwei asked puzzledly.
"Look!" Wang Xuexin said: "The anti-aircraft gun shells need to be manually adjusted for delay time. This will cause many problems and directly lead to the low hit rate of the anti-aircraft gun."
Sun Erwei nodded. Of course he knew this. This was a big problem for anti-aircraft guns, so the loader was often the most important member of the anti-aircraft gun crew... The loader was responsible for adjusting the delay fuze. How long the delay was depends on his experience.
He must determine the altitude of the enemy aircraft, then convert it into time based on the altitude, and then adjust the artillery fuze.
As long as there is an error in one link, the calculation is under or over calculated or the calculation speed is not fast enough, the shells will not be able to hit the enemy aircraft.
Therefore, the hit rate of anti-aircraft artillery is that on average, only one shot hits every 2,000 rounds.
But Sun Erwei doesn't think there is any problem with this. They have always played this way. In order to make up for this shortcoming, they can use other methods.
For example, by increasing the rate of fire of an anti-aircraft gun, the M1-type 90MM anti-aircraft gun can fire 20 shells per minute. The more shells, the higher the hit rate.
Another example is that you can use radar to cooperate with anti-aircraft artillery units, which can hit enemy aircraft beyond visual range to increase the hit rate.
Wang Xuexin continued: "What I mean is, since the radar can detect the distance of the target, why don't we create a fuze, which is a small radar that follows the launch of the artillery shell and continuously detects the distance between itself and the target.
The distance to the target is getting closer and closer...when the distance changes from near to far, there will be a 'boom' sound..."
As he spoke, Wang Xuexin raised his head towards Sun Erwei: "In this way, we don't need to adjust the delay time. Not only can it save the reloading time of the anti-aircraft artillery, but it can also increase the hit rate of the artillery shells. What do you think?"
Sun Erwei's eyes widened immediately, and then he nodded blankly.
After a while, he suddenly exclaimed: "This is great, Wang! This idea is great... I will report this idea to them immediately and demonstrate its feasibility! God, this is simply a miracle!"
With that said, Sun Erwei even forgot to say goodbye to Wang Xuexin, turned around and ran towards his residence.