Sure enough, as Yang Hui expected at the beginning, on the third day after the infrared navigation and targeting system, which are crucial in the ground attack of the new war, were decided, the preliminary design index requirements for the new war, which were jointly agreed upon by the high-level leaders of the army of the Republic and the Science and Technology Commission, came down.

Looking at these dozens of pages of documents, I feel that it can already be regarded as the level of a booklet, and I shook my head again and put this requirement on the table, this time the technical indicator requirements were not actually beyond Yang Hui's expectations.

The power system is naturally double thrust, there is no other objection, and the empty weight requirements of the whole machine are set to a maximum of 12.5 tons, which is somewhat different from the 13 tons expected by Yang Hui at the beginning, but it is not too big, and it will not be too much of a problem to explain the situation carefully.

The maximum take-off weight of the aircraft is also required to be at the position of 28 tons, which is consistent with the maximum take-off weight of the flying leopard, and even in the later design, Yang Hui also saw more similarities with the flying leopard data.

The maximum level flight speed is Mach 1.7, and the maximum flight altitude is 16,000 meters, which are not much different from the design requirements of the flying leopard.

What makes Yang Hui see the difference is that the new J has more ruthless requirements in terms of range, with a transfer range of up to 4200 kilometers, which is more than 500 more than the early Flying Leopard and F-18E/F, which is simply a life.

If it weren't for Yang Hui's early preparations, it would have been really difficult to meet these operational requirements, and even according to Yang Hui's current plan, the design would have reached a maximum of 4,000 kilometers of transit range, and we would have to think of a way to achieve the specified figures.

"It's a real headache! It seems that the short legs of the J-74 have made the army ruthless, and this alone is enough to make the new J-74 win the longest range of medium fighters. ”

Although he was a little surprised by the army's frenzied combat range requirements, Yang Hui had to think more about this aspect, and since the target was set in this way, he must pay attention to it.

I couldn't think of any better way to increase the internal fuel, and the transfer voyage would have required three external fuel tanks. The only way to increase the range is to take the last good way: conformal fuel tanks.

Speaking of which, it is not a good idea to install a conformal fuel tank, not only to see the amount of fuel that the conformal fuel tank can increase, but also to see the dead weight brought by the conformal fuel tank.

Conformal fuel tanks are very difficult to disassemble, and even conformal fuel tanks cannot be disassembled at general ground maintenance points, and many times they have to fly back to the overhaul factory or manufacturing plant for disassembly.

This thing is installed in order to reduce aerodynamic drag as much as possible. The seams of the fuel tank and the fuselage are filled and glued with sealing materials, and ordinary ground crews will never be able to complete the disassembly.

That is to say, this thing looks good for increasing the range, but when it is used on the new J, it is a bit chicken, originally because the new J-18 has achieved more internal oil than the F18-E/F because of better use of the internal space of the outer section of the wing, so as to achieve more range than the F-18E/F, reaching a transition range of 4000 kilometers in one fell swoop.

But now the 200 kilometers required on the index are just not up or down, and the range after getting on the conformal fuel tank will definitely increase by more than 200 kilometers, but is the army willing to accept this kind of thing?

After all, not all the time you have to transfer, more often you have to use it for various combat missions. Even sometimes ground attacks rely on internal fuel and air refueling, and more payloads are used to carry ground attack payloads.

At this time, the conformal fuel tank fixed on the fuselage is a burden, and the engine thrust of the new J is not enough, if it is a conformal fuel tank after the whole is indeed a bit collapsed.

Of course, if the range increase after installing the conformal fuel tank can be even better, maybe the new J can catch up with the range of the heavy aircraft, which is also a drooling advantage.

Thinking of so much, I have been struggling with this 4,200-kilometer voyage, and when Yang Huijue's conformal fuel tank was still a little chicken. Other units interested in the new destroyer project decided early on the design plan to adopt conformal fuel tanks.

Not all medium-sized fighters can reach the amount of oil in the new fighter designed by Yang Hui, and the internal oil of the usual medium-sized aircraft is about five tons. Even if this time because the technical indicators of the new J are larger than ordinary medium-sized aircraft, but it is only a maximum of 6 tons of internal oil, if there is no conformal fuel tank, the maximum range is about 3600 kilometers, which forces other design schemes to use conformal fuel tanks.

After looking at the tangled range problem, Yang Hui finally set his sights on other aspects. For example, the take-off and landing performance of the new J.

First of all, the take-off requirements for the new J-: take-off and running distance: 350 meters, landing and running distance: 1100 meters.

From this point alone, the take-off and landing indicators of the new annihilation have been very wide, especially compared to the new annihilation plan of the southwest science and industry. After all, it is an aircraft to be used for carrier-based take-off and landing, although there is a catapult. But the take-off and landing performance of the F-18 aerodynamic layout is absolutely excellent.

Derived from the F-18's excellent low-altitude and low-altitude performance, the new J-18 can definitely meet the army's take-off and landing requirements, and even do better, which is absolutely not to worry about.

Later, I saw the problem of the maximum overload of the new J-J, and through this we can see what the army's positioning of the new J-J is.

The maximum overload of a fighter that focuses on air superiority is usually 9G, and this maximum overload limit is more to protect the pilot, or there are reasons to protect the fighter.

Large overload maneuvers are usually difficult air combat maneuvers, that is, the maximum overload will be increased when only one aircraft is designed for air combat.

A multi-role fighter that focuses on the ground will rarely have a high overload maneuver, and when training the pilots of a multi-role fighter, it will not bother to resist overload.

The maximum overload is related to the range of use of the aircraft, and the typical F-18A/B is used as a ground attack, and the U.S. Navy stipulates that only the maximum overload of 7.5G can be used.

It can be seen from this that the maximum overload of the aircraft is closely related to its combat use, and as long as you look at the maximum limit overload of the aircraft, you can almost see the air-to-air combat capability of this aircraft.

The limit overload specified in the new J-1 index clearly shows one point: the air-to-air combat performance of the new J-1 has not been paid much attention, and the maximum overload is limited to 8G (that is, the pilot can bear up to 8 times his own weight in flight).

Of course, this overload limit is limited to protect the pilot, and at the same time, it can also give the new J-1 an index of structural design, which is usually designed in accordance with the allowance of 20 percent of the maximum overload specified in the structural design of the fighter.

The greater the maximum overload, the stronger the structure, so as not to easily disintegrate in the process of maneuvering with large overloads. The stronger the structural requirements, the more effort will be made in the structure when designing, and the structural weight, materials, and processing technology will be very different.

The overload requirements of 8G are specified, and the information contained in the two symbols is definitely the most valuable in the entire index, which needs to be well understood.

"Yes, this is indeed a requirement for a multi-role fighter, and now there is no problem with the design plan of the new J, and it is time to notify the main designers of the first to come to a meeting."

Yang Hui, who was talking to himself, had already prepared and began to gather the personnel from all sides, it was time to move for the new annihilation plan, and Southwest Science and Industry had been preparing for this for too long (to be continued.) )