Just when Qin Feng was enjoying himself in the cockpit, everyone else was also looking around the plane.

The first thing Tu Lao looked at was the hinge of the variable swept wing.

Prior to this, Tu Lao had inspected the variable swept wing structure of the MiG-23 and Su-20, compared with the Tomcat fighter in front of him, in addition to the difference in control mode, one manual, one automatic, there is also a big difference, that is, the size of the wing box.

Aircraft such as the MiG-23 have very small wing boxes in front and very long movable wings, and almost the wing boxes are not very conspicuous, while the current Tomcat fighters have very wide wing boxes, forming an appearance feature similar to wing-body fusion.

This is also the difference between the second-generation aircraft and the third-generation aircraft, most of the second-generation aircraft have a distinctive structure, the fuselage, wings, tail, quite clear, and the third-generation aircraft, almost fused together, it seems that the whole aircraft is like a whole, such as the current Tomcat, even if there is no wing, the entire fuselage, it seems to be a lifting body.

The technology of the United States is advanced, and only the United States can do this wing box in front of us.

The wing box is located at the back of the aircraft and is a box-shaped structure with a complex structure.

The wings at both ends of the box house the variable wing root hinges, which are the focal point of the variable wing design aircraft and the source of the aircraft's dead weight.

Soviet fighters, this part of the design, were made of steel, the strength was enough, however, the weight was too large, this problem was not solved, as a result, the advantages of the variable sweep wing were offset by the increased weight.

The United States did not do this, in order to make the weight of the wing box as light as possible without affecting the strength, Grumman used high-strength and light-weight titanium alloy to manufacture, because the titanium alloy could not be welded using conventional methods, for which vacuum electron beam welding technology was also developed. In addition to the load-bearing capacity, the wing box also constitutes an integral fuel tank.

This is also a very strange place, the Soviets did not lack titanium alloys, and also developed titanium alloy processing technology, but they just refused to use it in fighters, preferring to use it in submarines that are many times more in demand.

The American SR71 Blackbird uses titanium alloy, and the MiG-25 uses stainless steel, which is incomprehensible, perhaps, the Soviets considered the fighter to be a consumable, and it is not cost-effective to use such a valuable material.

At the beginning, for Grumman, the welding of this titanium alloy wing box determined the success or failure of the entire project.

Because this titanium wing box is a design ahead of its time, it consists of 33 precision-machined titanium components, including forgings and plates, which require more than 70 individual electron beam welds with a total welding length of 46 meters.

In order to weld these components, Grumman developed its own vacuum electron beam welding technology, which resulted in a powerful fighter.

This titanium wing box is also the strongest part on the F-14, and in many F-14 crashes, only the wing box has been preserved.

This is also the reason why it is difficult for other countries to imitate Tomcats, and this titanium alloy wing box has stumped other countries.

China also does not have this kind of technology, so if you want to build a fighter with a variable sweep wing, you can only use high-strength steel to build it, which will bring serious weight defects.

In later generations, many people are lamenting that if the Tomcat fighter was introduced back then, the navy would have been directly in place in one step, and there would be no need to continue to develop the J-15 on the basis of the J-11, and the navy and air force would be integrated.

However, they did not expect that the Americans would not provide technology, they only provided the whole machine, and the domestic military industrial enterprises could not complete the welding of this titanium alloy, so they could not imitate it, and they could only purchase it in batches, and finally let Grumman make enough money.

Since the founding of the People's Republic of China, the domestic military industrial complex has always been the standard of the Soviet Union, and it is much easier to imitate Soviet fighters, needless to say that this Tomcat fighter, even if it is the introduction of the Mirage 2000, it is not easy to imitate, because this is a change in the system.

Now, of course, Tu Lao will not know what will happen in the future, he stands in front of this titanium alloy wing box, feeling the power of Western technology.

What is really powerful is not how high the index is to create a finished product, but the basic industry, and the basic industry determines everything. Only the most knowledgeable can know this.

Tu Lao is lamenting the strength of the West, but his own side can only tinker with the MiG-21, and there is a big gap with the West.

"On this wing, there are no pylons?" At this moment, General Lin asked from the side.

Everyone is paying attention to what they are best at, Tu Lao is building airplanes, while General Lin is using airplanes, and he is concerned about how many weapons this plane can hold.

Ordinary fighters mainly carry weapons on their wings, but the current aircraft actually does not have wing pylons?

"Yes, for variable-swept wing aircraft, if you put pylons on the wings, it will cause a lot of trouble." Pelehaq began to answer his question.

"Because the wing sweep angle is variable, the pylon under the wing cannot be installed under the wing in a fixed way, otherwise the pointing of the weapon can not be consistent with the nose pointing, if the pylon is to adjust the corresponding grazing angle change action of the pylon, it becomes mechanically complicated, weight, reliability and cost have an impact, so we do not set up a pylon, moreover, the flat fuselage and wing sleeve of our fighter provide enough space for the weapon pylon, our mounting capacity is definitely the most powerful of all fighters."

The Tornado fighter jointly developed by Western Europe has wing pylons, so it is necessary to have a complex mechanism, and these pylons are follow-up, and when the wings change, the pylons will follow to keep the mounted missiles parallel to the fuselage, while the Tomcat fighter simply abandoned this set.

"Our fighter has eight hardpoints, four of which are under the belly, which can carry four Immortal Bird missiles and other weapons." Pelehaq continued: "Under the wing box, there are two pylons on each side, which can carry two Immortal Birds, as well as Sidewinder or Sparrow missiles, and these pylons can also be composite pylons, so that after hanging six Immortal Bird missiles, we can also mount a certain number of medium-range and short-range missiles. ”

The limit of the Tomcat fighter is six undead birds, and then it can attack six targets at the same time, which is so strong that it is perverted, however, this ability is rarely used, because this kind of fighter is deployed on the aircraft carrier, it can take off with six undead birds, but it cannot land with six undead birds at the same time, and two have to be thrown into the sea, so it is just a limit mount situation.

Following the direction that Pelehak was pointing, Tu Lao looked back again: "Is there a ship hook?" ”