Back to the Republic of China as a commander

The security level of the Chinese Academy of Sciences is also very high, no less than that of the Military Commission building. Experts here are generally not allowed to visit their families.The family members accompanying the camp were also required to pass strict political security checks, and the family members' jobs were required to be reassigned.Experts must be positioned at the deputy director level, and are generally not allowed to go out casually except for work needs.Once participating in a Tianjia-level research project, family members will not be allowed to follow, and they will also be moved from the Chinese Academy of Sciences to a higher-level security base, but there are no projects of this level here, let alone Tianjia-level, Earth-level research projects. A, there are no items at the human A level.

Rockefeller Jr.’s visit was more of a formality, and Wang Zhenyu’s meeting with more than 600 scientific and technological workers working here was the highlight. Their understanding of Wang Zhenyu is that he is a person who can save the motherland and the nation. Naturally, such a person should be given warm applause.Crying is avoided. It is said that Chairman Wang does not like this, and whoever cries will be in a hurry.

The last meeting with the American business delegation was in the large conference hall of the Chinese Academy of Sciences. In front of more than 600 scientific and technological workers, Rockefeller Jr. and representatives of several other large American companies, as well as Ye Guoxuan, chairman of China Development Corporation, and Liu Guojun, general manager Signed letters of intent for 24 fund and technology package cooperation projects including iron and steel, chemical industry, engine, electric power, etc.According to the agreement, these projects will be in place in 1918, which is the seventh year of the Republic of China, with a total investment of 70 billion Chinese yuan, mainly related to technology introduction.Wang Zhenyu believes that after these technologies are in place, China's industrial manufacturing level in many fields will have a leap forward.At that time, the products of many national capitalists will be full of international competitiveness, and there is only so much they can do. . .

What Wang Zhenyu didn't know was that in Nanjing, a conspiracy against him was slowly unfolding.

After seeing off the American business delegation, Wang Zhenyu suddenly wanted to be diligent. In his itinerary, visits and visits were slowly arranged, and one of the key points was the China Airlines Corporation in Wuhan.

Since the establishment of the Air Force Department of the Military Commission of the Nationalist Government in March of the sixth year of the Republic of China (1917), there have been only two priorities. One is the establishment of the three universities of the Air Force, the Chinese Air Force Flight Academy, the Chinese Air Force Command Academy, and the Chinese Air Force Engineering Academy. .

At the same time, 101 elite soldiers were selected from the abolished soldiers of the Army, and an Air Force Marine Division code-named 301 was formed to be responsible for the security of Air Force Xiangyang [-] Base.This base is actually an aircraft R&D and flight test base that gathers all talents in China's spaceflight.

Two of the most important structural innovations in aircraft during World War I were the cantilevered wing and the monocoque fuselage.A wing that does not require any tension cables is called a cantilever wing. Its basic structure is still spars and ribs, but the strength of the main spars alone is sufficient to support the flight load on the wing.The first cantilever-wing fighter actually produced during the First World War was the Fokker dr-i triplane with a speed of 115 nautical knots manufactured by the Dutch aircraft manufacturer Fokker for the Luftwaffe at that time. This aircraft entered Fokker in 1912 Designed by Buzi, who is the chief designer of the company. The 1917 Fokker dr-i wooden wing had no drag wires on it, and the triwing had a thin, streamlined, non-structural vertical strut running through the wingtips to control some of the flight The aircraft fluttered under conditions, and the strength of the wing came from a strong square spar.Because Buzi is proficient in welding, the dr-i's truss-style box-shaped fuselage uses welded steel pipes instead of wooden bars, but still retains crossed steel cables.The Fokker d.vii biplane, designed by Buzz and put into service in 1918, carried forward the dr-i's tension-free steel cables, box-shaped spars, high-lift wings, and cross-wire metal welded fuselage. Both aircraft featured canvas-covered, cantilevered wings with box-spars; the d. Splint the wing.Thick cantilevered wings and metal airplanes had been designed before Fokker's plane. In 1910, a German professor of thermodynamics, Yonkers, became fanatical about aviation. He first designed a metal cantilever thick wing with built-in tension steel cables. Although it was not actually produced, Yonkers applied this wing to his 1915 The monoplane j-1 designed and manufactured in 1 was earlier than Fokker's design. J-105 is the first successful all-metal aircraft. It is quite bulky. It can fly at 1917 knots and can only accommodate one pilot. The steel pipe structure of the fuselage is covered with thin iron sheets, so it is nicknamed the tin donkey. At the center height of the fuselage (mid-mounted), the wing roots are thick and taper off to thin, straight wingtips.Yonkers had wanted to use wood, but after careful consideration, he decided that only metal could complete his design concept.Yonkers believes that the trunks and branches that grow in nature can only provide wood with a fixed size and shape; while the properties and sizes that metal can provide are almost unlimited. It is easy to form, reliable, and the strength value can be correct. Mastery, but not affected by weather and atmosphere.Although the German government was skeptical and rejected Yonkers' design, Yonkers believed that the plane should have been made of metal and continued to improve his design.He changed the outer skin of the fuselage from the iron sheet to the lightweight copper-aluminum alloy newly invented in Germany at that time, and used it on the all-metal J-4 one and a half wing aircraft in 1918. The aluminum outer skin was wrinkled. It is pleated to increase strength, and the direction of the wrinkles is from front to back to reduce wind resistance. It was selected by the German army as the main ground attack weapon, and the Allies were almost helpless against it.By the end of the war in November 11, the j-9 and j-10 with all-metal, aluminum corrugated outer skin, and cantilevered single-wing configurations were in service one after another. The wings of these two types of aircraft were placed on the fuselage The bottom (low-mounted) is different from placing the wings on the top (high-mounted) or in the middle of the fuselage in the past. Yonkers considers that once the plane crashes, the wings can absorb the energy of the impact, which is not harmful to the safety of the pilot. benefit.With the advent of retractable landing gear, the low-set wing allowed the use of shorter, lighter landing gear, showing another advantage of this design.The influence of Yonkers on the evolution of aircraft structure is comprehensive. He is the designer and manufacturer of the first cantilever-wing aircraft, the first all-metal aircraft, and the first low-wing aircraft.Another important design innovation during the First World War was the monocoque fuselage. The monocoque structure has a thin and curved outer shell that can support the external load without the need for internal reinforcement bars. If the outer shell and the bulkhead that can share the load Or the overlapping of reinforcing bars is called a semi-monocoque structure, and the main load-bearing parts of these two structures are that layer of stress skin.Therefore, according to the strict definition, modern aircraft can hardly be said to be a semi-monocoque structure, because there are many openings in the skin of the fuselage to provide access for maintenance tools, so most of the aerodynamic loads are borne by the conformal strips and the bulkhead , instead of skinning.

The monocoque fuselage actually appeared on the eve of the outbreak of World War I. At that time, some people tried to lay several layers of thin plywood on the round wooden frame, but because it was very labor-intensive, the Few planes have been produced by this construction method, and one of the most famous is the French Contestant. This fast and streamlined monoplane shell-like fuselage is formed by upper and lower two-piece molding. Made of wooden plywood, it set a speed record of over 1912 nautical miles in 100.The breakthrough of the monocoque construction technology was in 1918, when Northrop, who was working in the Lloyd Aircraft Manufacturing Company, and the founders of the company, the Rock brothers Aaron and Moken, and the company's manufacturing foreman, Sturman, Jointly obtained the patent of the monocoque fuselage process, which greatly shortened the construction time.Patent number 1,425,113, with Northrop as the main designer.In 1918, at the end of the First World War, some aircraft structure design methods and trends seemed to have been standardized. For example, in order to increase lift, the wings were made thicker, and the curvature of the lower wing surface in the direction of the chord line was smaller, so wider planes could be used. Spars, which add strength and rigidity to the wing.There's also the clean, strain-free wings of the cables, and the era's trend of replacing wood with metal for the main structure.However, until the early 1920s, most of the aircraft flying in the sky at that time still had exposed tension steel cables, strong wings with ailerons, independent truss-type cross-wire fuselages, and cheesecloth-covered outer surfaces. Surface of a wooden biplane.

Wang Zhenyu still has a little understanding of the history of aircraft development. During World War I, the technology of monoplanes matured.But in the early days of World War II, a strange phenomenon occurred in the development of aircraft. The technology of civilian aircraft was far ahead of that of military aircraft.

Many commercial aircraft have popularized monoplanes, but military aircraft are still biplanes.Wang Zhenyu knows that this is the normal attitude of people towards new things, but knowing the history, what he has to do now is to change this in China.Wang Zhenyu is very clear that there is only one way for him to make China a world power in a short period of time, and that is to become stronger militarily. This has been practiced by many countries including the Soviet Union.And if you want to surpass the great powers in the military, the only way is to work hard in the air force, because this project can be regarded as the same starting line all over the world.

So currently all fifteen aircraft of base 301 (three transports, five bombers, three fighters and four reconnaissance planes) are required to use monoplane technology.However, none of these planes are produced by China itself, but are co-produced by Boeing.According to Wang Zhenyu, Ye Guoxuan invested in four aircraft manufacturing companies in the United States, including the Boeing Company founded by William Edward Boeing on July 1916, 7.