Chapter 556 Air Force: I want them all!
Mr. Xiao said that there was nothing he could do about it. The LYP-591 made of 6 and tungsten-molybdenum alloy gave too much. At the same time, the Northeast Aerospace Development Institute, which no longer had to worry about material properties, even had enough energy to solve the surge problem caused by unstable combustion in the original MiG-19 engine.

The afterburner thrust increased from 31.5 kN to 40 kN, and the military thrust also increased accordingly. The changes brought about are really huge.

Combined with the benefits brought by improvements such as wing-body fusion, elastic-to-fuel conversion, and wing slats, the performance of the Attack-5 has been completely transformed.

Even the leading edge serrations allow for a larger wing volume without substantially changing the weight of the aircraft.

This is still a conservative estimate. We haven't even started the detailed design yet, so there is still potential to be tapped.

However, Gao Zhendong and Mr. Xiao both knew that one should always leave room for maneuver when doing things. When reporting good news about forward-looking things, it is best to set up an ambush.

Several comrades who first got the evaluation data distributed the materials and let everyone attending the meeting have a look. Otherwise, it would be difficult to discuss. This matter is a bit big, and even if it is just an intentional opinion, we must fully absorb everyone's experience.

Like the previous comrades, when everyone received this data, their first reaction was disbelief, and then surprise.

"This is impossible, right? Such a huge improvement all at once?"

"Mistaken calculation?"

"They probably won't. There are only a few ways to make these kinds of estimates. There are traces to follow."

"It has been through a wind tunnel, so there may be some discrepancies in the details, but there shouldn't be any major problems in the general direction."

"That's incredible!"

"If this performance can be basically achieved, then this aircraft may be able to replace the Z-6."

"..."

Some comrades reacted quickly and said there is a problem here.

"Chief Engineer Gao, can the improvements that can be used on Gong-5 also be used on Zhan-6? With these improvements, can Zhan-6 achieve higher flight performance?"

Gao Zhendong nodded: "Some of the improvements can indeed be used on the Zhan-6, and the flight performance can be further improved. But for the most important improvement for multi-purpose aircraft - the space for electronic equipment in the nose, the Zhan-6 cannot be improved no matter what. This is an inherent trade-off problem."

Gao Zhendong finished speaking and made an estimate: "Please see, with other conditions unchanged, the thrust, which is most important for speed, has increased by about 27%. According to the formula, speed and the square root of thrust are positively correlated. In other words, a simple calculation shows that with this thrust, the speed can be increased by about 12%, and the final speed is about Mach 1.5."

Well, data is the easiest to compare. Although Gao Zhendong’s estimate is very simple, it is well-organized.

Seeing that everyone agreed with his calculations, Gao Zhendong continued, "Even if we calculate based on the improvement of Gong-5 with other improvements, it can only increase to Mach 1.6. There is no essential difference between this and the 5 estimated for Gong-1.35. Don't forget that this comes at a price."

The 1.6 Mach just made the Air Force's eyes light up, but they soon remembered something and were no longer excited.

But other comrades don’t know what they are thinking, they just want to know, so, what is the cost?
"I won't go into details about the radar issues. It should be noted that even with these improvements, the internal fuel range and payload of the Z-6 are still not as good as those of the Gong-5."

Some comrades were puzzled by this: "Why? There is not much difference in the structure of the two, right?"

"There are still differences. The Gong-5 was originally designed to be an attack aircraft, and it has been improved with a bomb bay and a larger wing load. Its speed is much lower than that of the Zhan-6 under the same conditions. In addition to the resistance caused by the nose air intake, part of the cost is due to these improvements. But these costs are not in vain. When the Gong-5 is used as a multi-purpose fighter, these advantages still exist."

The bomb load of the Zhan-6, minus the auxiliary fuel tank, is 0.5 tons, while the original Gong-5 model has a bomb load of 1.5 tons!
To put it bluntly, based on the Zhan-6, the China Aviation Industry Corporation gave the Gong-5 a better fuselage structure design. Whether it is an attack aircraft or a fighter, in addition to speed, the foundation is better.

But does speed matter? Not really here.

"But the speed gained at such a high price is not very useful in actual air combat. The maximum speed can only be reached by turning on the afterburner. Whether it is 1.35 or 1.6, there is actually not much difference. Real air combat will not take place in this speed range."

But speed is not completely useless, as other comrades knew: "But what about volleys?"

Gao Zhendong smiled, and his smile was somewhat mysterious: "The interception problem is the task of another type of the three levels and three types, and this 1.6 Mach Zhan-6 can be used as a backup for that type. If that type of target aircraft cannot be made, then use this high-speed Zhan-6 as an interceptor." Gao Zhendong actually knew what was going on. The situation he saw in his previous life was much more severe than the current one. In his previous life, even using the 1.6 Mach Zhan-6 as an interceptor was a luxury. As for the 7th Master... it would be a good plane after all the modifications. The problem is that it came too late. The saying "good things come to those who wait" does not apply to military equipment.

Of course, getting rich is not the 7th master, this stuff is already a new thing.

He smiled mysteriously, actually he was laughing at the Air Force. "Come on, tell me something. Is this thing the most suitable one for interception? Don't you have any idea?"
In fact, not only the Air Force knows this, but a very small number of comrades present here also know this, but they dare not say it.

The comrade from the Air Force coughed twice, a little embarrassed: "Ahem, well, we are negotiating with the Russians about importing and replicating the MiG-21. That plane flies faster and higher than this one."

The comrades attending the meeting suddenly realized, hey, you should have said it earlier. If there is a better interceptor, there is indeed no need for the Z-6 to take on the interception mission.

Moreover, Chief Engineer Gao's idea of ​​using the high-speed Z-6 as a backup model for interceptors is also very good, which effectively reduces the overall risk of interceptors.

Originally, the introduction and imitation of the MiG-21 began in March 61. Although this matter was a secret, the people at this meeting were qualified to know about it. There was no point in continuing to cover it up, and it would affect the judgment of intentions.

The aircraft's speed of Mach 2.05 and its service ceiling of 18700 meters are more suitable for interception. Although its combat radius of 600 kilometers is smaller, it is not much different from the 6 kilometers of the 680th generation. Besides, it is not impossible to modify it. The Air Force is becoming more and more interested in and confident about the improvement of aircraft.

In the end, the Defense Work Committee was more practical: "But if such a big change is made, the supporting facilities of the production plant will also be a problem. Now the entire system has been established for the Zhan-6, and it is not something that can be changed just like that."

Gao Zhendong smiled happily: "Yes, this is also the reason why I chose Gong-5 as a multi-purpose fighter. It and Zhan-6 are born of the same mother. If they are not twin brothers, they must be brothers. The production and supporting system prepared for Zhan-6 does not require too much cost for it. It can be used after some modifications."

Moreover, in this way, the resistance that people related to the Z-6 system may exert on this matter will be reduced, because they will continue to do what they should do and will not be affected.

The Defense Committee and the Air Force were speechless for a moment. Hey, this guy is waiting here. He has considered everything very carefully from beginning to end, and every detail is tightly fastened.

But thinking back, what would you want if it had a multi-purpose fighter with a combat radius of more than 800 kilometers, a top speed of Mach 1.35, a practical ceiling of 17600 meters, a bomb load of 2 tons, low-altitude and high-speed penetration capability, a big head that can hold more electronic equipment, and is relatively cheap?

Don't be a fool!
Even if the data at hand is estimated and not yet realized, the evaluation process is scientific, and the basis of the evaluation has even been researched. The data is not fabricated, so it is worth further study.

The leader of the Air Force groaned for a while, then nodded and said, "Well, in my opinion, this thing is worth doing, but the current Zhan-6 does not need to be produced at a low speed, but at a normal rate. We should produce this high-altitude and high-speed type with the latest engine, or the interceptor type. This way, before the new system is formed, there will be more useful interceptor fighters, and they will not be wasted. The production of this Zhan-6 interceptor type can be continued until the MiG-21 is successfully copied."

They are very generous. As long as there is something good, they will try their best to get it.

The high-speed fighter-6 cannot be left unused, as this will affect the country's air defense combat capability. Good aircraft must also be developed without delaying either side.

The Air Force needs to consider both the Z-6 interceptor type and the Gong-5 combat type. There are many issues that it needs to consider, unlike Gao Zhendong who only considers saving money as much as possible while ensuring the effect.

The Air Force is conservative on this matter, but they think that Gao Zhendong, a radical, is still too conservative.

Gao Zhendong could only sigh that they were better at this aspect.

What he didn't notice was that his comrades in the Air Force had already begun to use the "new system" to refer to the Attack-5 combat type. What this means is self-evident.

Everyone felt that this decision was reliable, even the comrades related to the Z-6 were not affected at all.

Continue to produce the Z-6 interceptor type normally. After the Gong-5 fighter type is completed, the two will be produced in parallel until the imitation of the MiG-21 is completed. Then the production of the Gong-5 fighter type will be fully switched. There will be no delay at all and no one will be hurt.

That's not quite true either - enemies can get hurt.

This is also another level of consideration for the Air Force comrades beyond technical and tactical considerations. This approach not only reduces technical risks to a minimum and maximizes the country's air defense combat capability, but also does not affect anyone and encounters very little resistance to its implementation.

It can be said that the Air Force's suggestion is to truly consider the issue of multi-purpose fighter jets as something that must be effectively promoted, so it tries to take care of all parties and reduce various resistances.

(End of this chapter)