blood feud

It turned out that when Bai Shujie deliberated (it must not be called research, at most it is a copycat) airborne (shipborne) radar, he encountered two biggest problems: first, which antenna to use, what kind of scanning mode and analysis mode; second, How far to detect.

For the first question, the antenna scanning method that can be selected at present can only be mechanical scanning, that is, the antenna is constantly rotating.

Bai Shujie tried his best, and finally decided to use the "Yagi antenna". It is more reliable to use something invented by the little devil to attack the little devil.

If you want to scan 360 degrees, Bai Shujie's current "road processing factory" is not very reliable. If you want to distinguish what the received signal is, an antenna is not enough.

In the end, Bai Shujie decided to use two antennas, which can repeatedly scan the same area and increase the "recognition accuracy rate".

The worst thing is that the aircraft at this time are powered by propellers, that is to say, they cannot be installed on the nose, but can only be placed in the rear cabin. In this way, the installation of the two antennas has problems.

It is impossible to set up two antennas above the plane. It is impossible to be so exposed. There must be a cover, and the requirements for this cover are even stricter. Absolutely cannot use "wave-absorbing materials", otherwise it is not a radome. Instead, shield the net.

Secondly, the radome must also have a certain strength. If the aircraft is blown away as soon as it accelerates, or is blown out of shape, it will be completely finished.

Finally, through the master craftsmen of the plastic factory, a kind of plastic cover with sufficient strength, thinner thickness and relatively uniform texture was figured out, which solved the problem of the antenna, and as a result, even bigger troubles came out again.

This is the second problem: the volume of the transmitter and receiver creates the problem of scanning distance.

In this era, not to mention transistors, it is very difficult to even obtain electronic tubes. Bai Shujie searched through more than 100 fishing boats and freighters that were determined to be demolished. Some old-fashioned communication stations were disassembled and finally collected. Enough tubes for three devices.

However, the disadvantage of the electronic tube is that it is bulky, and the transmitter and receiver produced are very bulky.

Bai Shujie led his secret team to produce the first experimental radar. The transmitter and receiver weighed more than 80 kilograms, and the volume was 3 meters wide, 5 meters long, and 1.5 meters high.

Although the detection distance is absolutely leading in this era, reaching 120 kilometers, but such two big guys, it doesn’t matter if they are usually used on the ground. .

After some deliberation, Bai Shujie believes that the radar scanning distance in this era does not need to be too far, and it is enough to be able to figure out a radius of 40,,80 kilometers.

The maximum speed of aircraft in this era is less than 700 km/h, and the more advanced fighter jets are only about 680 km/h.

If the radar can detect an aircraft 40 kilometers away, the pilot has about 4, 5 minutes to react, either choose to escape, or choose to seize a favorable altitude to ambush the enemy aircraft.

By reducing the scanning sensitivity, the size of the transmitter and receiver can be reduced accordingly.

Bai Shujie's current technical conditions are limited, so he can only temporarily choose a magnetron oscillator to transmit signals. Under the control of a pulse modulator, the high-frequency pulse power generated by it is directly fed to the antenna, and then the antenna is boosted and then transmitted.

The magnetron is composed of a tube core and a magnetic steel (or electromagnet). The structure of the tube core includes four parts: anode, cathode, energy exporter and magnetic circuit system.

After all these main problems are solved, the defects of the electronic tube itself are finally left, that is, large power consumption and easy overheating, which have a great impact on the sensitivity of the signal receiver.

Especially after compressing the size of the transmitter and signal receiver, these problems became more prominent. After several failures, Bai Shujie finally did not give up, and finally he could use it in front of him.

The current aircraft does not have any air conditioner, and even the fan cannot be installed. Bai Shujie can only take out a Type 96 g3m2a medium-sized bomber, directly fix the main board in the cabin, and then use a layer of gauze to make a cover that can block the dust. up.

That is to say, the so-called "airborne radar" created by Bai Shujie is like the computer mainframe of later generations without a case, completely realizing "running naked".

In any case, this is an epoch-making pioneering work. After the flight test of this aircraft, the "Feilong-75 radar" named by Bai Shujie took off from Myohyang Mountain, and it was able to distinguish an aircraft taking off simultaneously from Gangnam Airport in Pyongyang [-] kilometers away. .

The final practical detection distance has reached 75 kilometers. In other words, when all aircraft are currently flying at the maximum speed, their own pilots have 7 minutes to respond.

Bai Shujie chose the Type 96 G3M2A medium-sized bomber as the carrier of the airborne radar because the little devil's aircraft has a cruising range of 4000 kilometers.

Because there is no need to carry 800 kilograms of aerial bombs, but an auxiliary fuel tank is installed, the cruising range reaches 4800 kilometers, and the combat radius is 2200 kilometers.

96式g3m2a中型轰炸机在3000米高度,最大平飞速度350km/h,也就是说,经过改装以后带上副油箱,可以连续飞行13个小时（沒有考虑机身和发动机的承受能力）。

Therefore, Bai Shujie decided to refit two planes in one go, so that he could serve as the air command mission 24 hours a day during the war, and use two fighter squadrons to take turns to fight in the air at the same time.

This time Wang Xinlan led the team to the United States and Europe, and one of the major tasks was to purchase the most advanced electronic tubes, oscilloscopes, filters, and displays before further improving the airborne radar and creating a real eye in the sky.

其实,白书杰最先准备选择小鬼子的97式ki21重轰炸机作为雷达载体,可是他始终沒有搞明白,为什么最新的轰炸机,续航距离只有2500km,就算不加载1000公斤航空炸弹,改成副油箱以后的续航距离,还是只能达到3200公里。

Zhao Jinxi followed Bai Shujie to board a plane numbered zh001, and found that the inside of the cabin was "a mess", and he was a little puzzled: "Is this what you worked hard for? It looks like a vegetable market inside, and there is something on the back of the plane. What are the two bulges?"

"This is the Air Command," Bai Shujie explained in the most common words: "The people on this plane can detect the enemy's plane in advance, and then notify their own people to take appropriate countermeasures."

Zhao Jinxi finally found something he knew: "You brought our general-purpose machine gun up here,"

Bai Shujie said with a smile: "That's right, the original weapon of this aircraft is two 2mm machine guns, which are too powerful and we don't need to carry bombs, so I changed the original two machine guns into four, and the bullets equipped are all They are all armor-piercing incendiary bombs, as long as one bullet hits the target, the kid’s plane will definitely be finished.”

“这架飞机定员7人,我改装以后还是7个人,其中驾驶员两名,天线控制1名,发射机控制1名,信号接收机1人,机枪手2人,4挺机枪在四个方向,两名机枪手可以根据敌机的方向,随时选择使用什么位置的机枪,”

Zhao Jinxi nodded: "You just said that you are worried about the annihilation of the whole army, what exactly do you mean?"

Bai Shujie's face suddenly collapsed: "I was thinking that the straight-line distance from Pyongyang to Tokyo is 1300 kilometers, and one round trip is 2600 kilometers. In addition to finding targets and dropping bombs, two circles are required, which is about 2700 kilometers. After such a long time, the fighters of the little devil will definitely come out to join the battle,"

"The key problem is that without a ground control tower to guide the direction, flying blindly in an unfamiliar airspace is extremely dangerous. In the fierce battle, it is still easy to go wrong, "

Zhao Jinxi stared at Bai Shujie and said, "Preparing to take action against Tokyo, have you discussed with Zhang Nianzu and the others?"

"We've discussed it," Bai Shujie nodded, "They took the initiative to come to me, because the pilots strongly demanded to bomb Tokyo and indirectly support the defense of Nanjing. They are currently studying how to improve the bombing bay,"

"Because I specially designed an air-dropped napalm bomb, each 100 kilograms, and each bomber carries 4 bombs, and a 400 kilograms auxiliary fuel tank is added to increase the range to 4400 kilometers,"

"The key is that our fighter jets have a combat radius of only 300 kilometers, and there is no way to escort the bombers. The biggest problem with bombers is that their speed is too low. If they are chased by enemy fighter jets, they will be very passive. What I mean is that the entire army may be wiped out. It is very likely that the bomber formation that went out will not be able to come back,"

Zhao Jinxi looked at the sky and pondered for a long time, and finally said: "We don't want to occupy the Japanese island, but to punish those war lunatics, so my point of view is that there is no need for precise bombing, as long as we can throw incendiary bombs into the urban area of ​​Tokyo That's it, and then immediately return to escape, "

"You also said that the biggest problem with fighter jets is the pursuit of speed, which results in very little fuel, which limits their cruising range. Then we think in reverse, as long as our bomber formation moves fast enough, we can finish dropping the bombs. From now on, fly to 500 kilometers away as soon as possible, the enemy can do nothing to me, "

Bai Shujie smiled wryly and said: "It's all my fault that I didn't explain it clearly to you, because besides ordinary warships, there are also aircraft carriers. What is an aircraft carrier? It is a very large warship with many fighter jets and bombers wandering on the sea. If the little devil’s fighter jets take off from the aircraft carrier to intercept, it will be really dangerous,”

"Commander-in-Chief, you are wrong,"

Just at this time, Zhang Nianzu, the commander of the aviation division, came over with the pilots of the Light Bomber Squadron, and immediately said: "Brothers in the ground troops, fighting the enemy face to face is not dangerous. They would rather use their bodies to roll landmines. for what?"

"Our task is to fly to the heart of the enemy and drop the bombs. As for the danger, that place is not dangerous during the battle. If we were timid, we would not choose to be pilots,"

The pilots shouted in unison: "We have committed an unforgivable crime for losing the three provinces in the Northeast. Today we finally have a chance to avenge our shame. Please order the commander-in-chief. We will set off at one o'clock and bomb Tokyo at five o'clock in the afternoon to avenge our revenge."

After all, what happens next, let's see the next chapter to break it down,