"Upgrade!" On the evening of the 3rd, when the first chariot factory in the sub-base of Luan County was also completed, Meng Xiang immediately ordered the upgrade.

On the 4th, there was still no war in Tianjin, but the tense atmosphere was like solidifying the air, making people feel suffocated when they breathed.

Tianjin is a political and diplomatic battle. But the Japanese and the Pioneer Army are preparing to resolve the problem with violent means. The war is approaching, and many people in Tianjin fled, some fled directly from Tianjin, and some fled into the concession. In the eyes of the people, the concession is the safest place, and Westerners, whether they are all the commanders or the Central Army, dare not provoke them. Even if the Japanese have to be polite, the Pioneer Army will also be afraid of foreigners.

"There is nothing to be messed with! It's just not now!" Meng Xiang just smiled at this rumor. A big chess game was about to be unfolded, and they were pushed down step by step.

Zhang Lingfu and others advanced all the way, and with the 74th Division and the 39th Division, 50,000 troops were pressed over. In one day, the 3rd Regiment of the 27th Division of the Japanese Army, who was clamoring to turn Handan into ruins, were beaten to the 3rd Infantry Regiment of the 27th Division of the Japanese Army, who was clamoring to turn Handan into ruins, and there were few people missing. Colonel Miyazaki Tomoo of the 3rd Regiment, committed suicide.

Handan also fell into the hands of the vanguard army.

The troops in front advanced, and the garrisons of the vanguard army behind also continued to clear out the remaining small Japanese troops and a large number of traitors.

Since the minimum living security policy in the SAR has spread, other places under the rule of the Pioneer Army must also be implemented. The resistance they face is not only from above, but all kinds of gentry are the most stubborn conservatives. When the Japanese came, most of them chose to rely on them in order to protect their property. This brought an excuse for the cleaning up of the Pioneer Army.

The Pioneer Army has long formed French regulations on the handling of traitors. Where can one escape the guilt without being punished? Even if they are forced to leave some explanations to the people. The newly formed citizen congresses in various places will hold a final trial on them.

"Hurry, keep up!" Ling Donglai stood by the roadside and greeted the soldiers behind him vigorously.

After standing firmly in Peiping, the vanguard army immediately cleared out and intercepted the Japanese troops stationed in Mongolia and Shanxi.

Especially the troops stationed in Mongolia from Zhangjiakou, the vanguard's brigade of the vanguard army lacked heavy firepower and more than half of the personnel were transferred away. The remaining people could not stop the Japanese's fierce attack, so they could only retreat step by step, block and harass and restrain them. The Japanese passed by Xuanhua along the Beijing-Zhangjiakou Railway. When they were almost Huailai, they were blocked by the vanguard army who came to support with the cooperation of air forces.

In order to rush to support, hundreds of vehicles of all sizes in Peking were collected. However, some places with complex terrain could only walk by people. However, these terrains could not stop the fast aircraft, and nearly 100 aircraft arranged at Beiping Nanyuan Airport continued to take off and land.

"It's still convenient for the plane. We ran for most of the day. It flapped its wings and arrived. It dropped a bomb and landed directly on the Japanese head. Look at the other person's machine guns, six tills fired together, and the Japanese had no place to run!" Cai Bao looked at the two fortifications blocking the middle of the road just now, and the Japanese were soon blown away by the bomb. He couldn't help but dance.

The two fortresses were built with huge stones, and the 80mm mortar was not useful. It was their company commander Niu Babai who called for air support and directly lifted them off. The two Stukas and two lightnings that flew in directly helped clean up the Japanese in front with machine guns. They came from a long journey, lacking anti-aircraft guns, and could only stare at them after a 20 anti-aircraft gun was bombed.

"Let's go down!" Ling Donglai kicked Cai Bao and stared at him, "Why are you yelling? Haven't you seen a plane? Didn't you have already sat on it when you came? Are there any wings on the plane? Don't show your head at all, be careful of the Japanese bullets!" Many veterans of the Japanese were very accurate in shooting. Although the firepower was not as strong as the Pioneer Army, they were very threatening and were accidentally slaughtered. Although the 38th rifle bullets were not hit by the vital points, they usually couldn't die under the medical conditions of the Pioneer Army, but after all, they had to penetrate a hole and suffer for a while.

Ling Donglai glared at Cai Bao again in anger. The reason why Cai Bao was able to enter the teaching team was entirely due to his clever mouth. The verbal imitation was first-class, and the birds and beasts were almost real. Although he could not speak Japanese, sometimes he imitated some simple sentences, and even the Japanese could fool him. When he joined the guerrilla brigade, he assisted the attackers of the guerrilla brigade to drop a stronghold of the Japanese with his mouth, and was elected to come up. A few days ago, the people from the special forces were still coming to prepare to transfer people, but they were delayed by the battle in Peking. Although Cai Bao also went to the battlefield this time, he was a target that needed attention to protection.

"This thing is easy to use! It would be great if we always followed two planes above our heads!" Ling Dong looked at the plane hovering in the sky, and was also amazed in his heart.

In fact, these aircraft do not need to always follow the head. When they need air fire support, they call us by calling us by phone. After dispatch, there will be aircraft immediately to rush to support, which is more convenient than artillery. Especially in some places where artillery is difficult to move in the mountains and can not be driven by artillery.

"This plane flew so fast and could not hit even if it fired so many shots. Can't it stop and attack?" A plane from afar dived back and forth to attack a group of Japanese devils, but the smart-savvy Japanese used the cover of rocks and trees to hide. Cai Bao was anxious to watch.

"Will it fall down after it stops!" Ling Donglai couldn't help but laugh.

"How can the dragonfly stop?" Cai Bao replied disapprovingly, and gestured a dragonfly's move.

"This thing is still very troublesome. If something goes wrong, you have to keep following a large group of people to maintain it." Zhu Jiaren patted the simple and ugly big guy in front of him. Although he said this, his eyebrows were full of pride.

He had always dreamed of building aircraft. Last year, he just built a Suzhou aircraft. Although its performance was not as good as that of foreign advanced aircraft, it was at least built by the Chinese. When he was the director of the third aircraft repair factory in Luoyang, he was poached by the Pioneer Army. Later, because he was interested in seeing the concept of helicopter proposed by Meng Xiang, he began to be responsible for the manufacturing of the Pioneer Army's own helicopter.

History was once again a coincidence, and even Meng Xiang didn't know that Zhu Jiaren was the father of the helicopter in another time and space.

The world studied helicopters very early, and Da Vinci drew sketches of helicopters from the inspiration of bamboo dragonflies very early. People continued to explore this kind of aircraft that could hover freely in the air throughout the 19th century, among which Edison even claimed that "helicopters are the best solution to achieve flight." In 2007, the world's first manned helicopter had a successful first flight.

But the world's first practical helicopter vs-300 was born in 39 years in the hands of Sikorsky.

However, Sikorsky's company is now in the hands of Meng Xiang. Sikorsky is still the president and the nominal largest shareholder. But the second, third and fourth shareholders are controlled by shadow companies respectively.

Although after the base was upgraded, most of the key technologies of helicopters had been broken and no obstacles could be encountered, the performance of these first-generation helicopters in World War II was still much worse than Meng Xiang's requirements. Once they encountered propeller aircraft at this time, they could only be targeted. Of course, when the Pioneer Army obtained air supremacy, helicopters could still deal with infantry.

Before the end of World War II, there were not many practical helicopters, only the R-5 and Bell 47 helicopters were barely available. After Meng Xiang produced three of them, he did not continue to produce them. Instead, he made every effort to cultivate his own helicopter manufacturing personnel on this basis.

The hummingbird in front of Zhu Jiaren is the result of continuous research, and does not completely imitate R-5 and Bell 47. Many majors need a solid foundation. The more basic it is, the easier it is to extend new development ideas. Blindly imitating and imitating will only ruin the creativity of their scientific and technological personnel.

The helicopter research team led by Zhu Jiaren started researching from the most basic technology, borrowed some ideas for studying helicopters from abroad collected by Shi Er, and laid a foundation for more than half a year before starting its own manufacturing based on the development ideas of the Bell 47 helicopter and some future helicopters prompted by Meng Xiang.

After the piston engine provided by the base solved the power problem, other problems were also solved one by one with the continuous research of more than 30 people in their group.

"Be careful!" Zhu Jiaren held the hand of Luo Ji who boarded the helicopter hard. Luo Ji was his friend. Before the test flight, Zhu Jiaren originally wanted to test the flight with him, but was stopped by Luo Ji, the squadron leader in the Pioneer Army Flight Team.

"Although there are not many pilots in China, there are much more than take-off aircraft engineers. If I have misfortune in my test flight, there can be others who can continue to take on the test flight. But there are too few people who dare to make their own planes, so you must stay on the ground to do future improvements." Luo Ji said in a low voice.

The wind blowing from the propeller raised the sand and dust and swept the people watching from afar, but Zhu Jiaren still covered the squinting sand and dust with his hands, staring at the hummingbird flying little by little.

"Okay! Take off successfully! Check the data quickly!"

“Speed ​​speed, 121 km/h!”

"Flying altitude, about 5467 meters!"

While everyone was watching, the hummingbird slowly landed steadily in the air. Before the rising dust fell, the staff next to him shouted excitedly:

"Continuous flight time, 1 hour, 31 minutes, 26 seconds!"

"We succeeded!" Everyone cheered in unison.

On November 4, the first practical helicopter in this time and space was born in China.
Chapter completed!