Time is passing, and 1988 has come to an end, and the scientific researchers who are fighting for the aviation industry are still struggling day and night.

Qin Feng's heart was filled with a little excitement, although he didn't have time to go back this New Year, but he was also willing to stay here and further carry out the test flight, and after the initial test flight of this aircraft proved that there were no flight problems and could meet the long-distance test flight, he could fly this fighter and fly to the test flight institute.

The follow-up scientific research test flight will be carried out in the test flight institute, after all, the test flight institute is the cradle of the special flight flight, and the scientific research test flight of the test flight institute is quite scientific, and after going there, he can be with his lover.

Getting married, having children, one life event after another, have passed, but Qin Feng's life is still lonely, he and his wife have been separated for a long time, and the relationship between the two has not been diluted because of the distance, on the contrary, it has become more sublimated.

Thinking of being able to go back to the test flight institute, Qin Feng's heart was full of excitement.

"Our J-7 originally had a range of 3,000 kilometers when it was designed, but in order to avoid any accidents, we need to mount auxiliary fuel tanks to complete this transfer flight for the sake of safety."

The follow-up test flight is still being planned, and then a stage of test flight is carried out to confirm that there is no problem with safety, and it is time to transfer, J-7 has created a domestic miracle, this is a two-seat fighter-bomber with a considerable range, when other fighters only have a range of more than 1,000 kilometers, it has a designed range of more than 3,000 kilometers.

However, these are all design data, and the real large-range test flight has not yet been carried out, to be exact, this time to the test flight institute, it is also equivalent to a transfer test flight.

Then, for the sake of safety, it is more appropriate to mount an auxiliary fuel tank.

For fighters, if the fuel load factor in the aircraft is not large enough, then carrying the auxiliary fuel tank can effectively improve its range and increase the empty time, which the French are the best at.

The engine technology of the French is actually not very good, even if it is the M53 engine used in their current Mirage 2000, the fuel consumption rate is not low, so it is called the turbojet in the turbofan, however, the French generally do not worry about the range, because they all have large auxiliary fuel tanks.

Take the Mirage 2000 as an example, the fuselage of this fighter is not big, even if it is a large wing brought by a tailless delta wing, so that its wing stores more fuel, it is also limited, so its in-flight fuel, the maximum range is only more than 1,000 kilometers, but people's can have super large auxiliary fuel tanks.

If you look at the photos, you can see that the Mirage 2000 has a huge cylindrical streamlined body hanging under its belly and on the inside of the wing, which would be horrifying if it was a bomb, in fact, it was its auxiliary fuel tank.

It can carry a 1,300-litre drop-in drop fuel tank on the fuselage center pylon, a 1,700-litre drop drop tank under each wing, and a 2,000 L drop tank under the D-type and N-wing in the later stages.

In this way, the fuel attached to it is almost the same as the fuel inside the aircraft, which doubles its range and becomes a long-range fighter.

If the performance of their engine is not good, then reduce the fuel coefficient, you can make the body lighter, and the maneuverability will be better, which is also a helpless choice, as for its range, it is completely increased by adding auxiliary fuel tanks, which is also a common practice.

In comparison, the domestic J-6, J-7, and auxiliary fuel tanks can be hung up to hundreds of liters, so when foreign customers purchase, increasing the volume of auxiliary fuel tanks is almost a hard indicator.

However, if the auxiliary fuel tank wants to increase, there are many limitations, the first is the loading capacity, after all, this thing has weight, if the hanging point is not strong enough, it will not be able to hang at all.

Secondly, it is the space limit, the auxiliary fuel tank, the volume is very large, if the space is not large enough, then there is not enough place to accommodate the auxiliary fuel tank.

These J-7s have no advantages, the weight that can be hung at the anchor point is small, and at the same time, the landing gear also occupies valuable space under the wing, so the auxiliary fuel tank that can be hung is not large.

However, the J-7 is different, when the J-7 was designed, it was originally a fighter-bomber, and the payload capacity was very strong, and then look at its wing, it is an upper single-wing structure, the highest from the ground, and there is enough space, so the auxiliary fuel tank prepared for the J-7 should also be very large, right?

Now, the J-7 does not need any auxiliary fuel tanks, it is enough to rely on the fuel in the aircraft, but what about later? Perhaps, the motherland will be in need in the future.

"Hey, why don't you mount this fuel tank on the inner pylon?" When Qin Feng came to the front of the plane and saw that the technicians were trying to start hanging the auxiliary fuel tank, he was quite surprised.

The wing is gradually narrowed and thinner from the inside to the outside, and the outer moment is larger, so for the wing, from the inside to the outside, the weight that can be mounted is gradually reduced.

The wingtips of the wings can only hang a short-range air-to-air missile, but the weight that can be mounted on the innermost side of the wing is definitely more than a ton.

The auxiliary fuel tank of the J-7 should also be hung on the inside, but now, Qin Feng saw that it was mounted on the pylons in the middle of the wing, which was strange.

Hearing Qin Feng's question, Chen Lao said helplessly on the side: "When designing, this is how it is. ”

And such a design?

What to mount, not casual, it is decided when designing, such as the auxiliary fuel tank, if you want to be able to mount the auxiliary fuel tank, then at the hanging point, you have to reserve the oil pipe interface, otherwise how will the oil from the auxiliary fuel tank flow to the inside of the aircraft? At the same time, there must be a power supply interface, and the current should not be too small, because there is an oil pump in this oil tank.

If it is to hang missiles, then there must be a weapon interface, the West already has a universal weapon interface, as long as the communication protocol is stipulated, you can hang it at will, but the domestic one, there is no such advanced one.

Looking at Qin Feng's questioning gaze, Old Chen said, "The pylon on the inside is reserved for our anti-ship missiles. ”

Back then, this kind of aircraft was designed as a kind of bomber used by the Navy and the Air Force, but the Air Force finally parted ways, relying on the investment of the Navy, the surviving J-7 no longer has the mission of dropping bombs, and it now only has one purpose, which is to launch anti-ship missiles!

Relying on the slow old H-6, although it can launch anti-ship missiles, there is no return.

East China Zhixiong said

PS: I watched the military parade yesterday, the scene was really spectacular, this time watching the military parade, the deepest impression, one is to emphasize the multi-arms combination, the other is to highlight the information-based combat capability, I don't know if you readers have this feeling. When I wrote earlier in 1984, there should be a military parade to let the protagonist show his style, but unfortunately it has been written, then, there is only the 1999 military parade left, but this parade, J-10 did not play, the protagonist should be driving the J-8 oil engine to participate in the parade. I'm really looking forward to writing about that big scene and showing the demeanor of my great country.