The general helicopter improvement project over there in Bingcheng, Chang Haonan took a little care of it, and then handed it over to Liu Hongbo to do.

The platform of Z-9, no matter how it is said, is a 4-4.5 ton medium-sized helicopter, and it is also the introduction of a relatively mature design from France, even if it is changed, the risk will not be very large.

At best, it falls short of the design requirements.

It's not like it hasn't happened.

The first armed modification of the Z-9, that is, the Z-9W in that document, was finally accepted after the design index was lowered.

What's more, the 602 Institute has made it clear that this improved version will still not make earth-shaking changes to the basic design of the straight 9, so there is nothing to worry about.

The rest of the Torch Group needs to learn to be independent.

It's a good practice session.

After all, for Chang Haonan, the two most important things at the moment are the turbofan 10 that has entered the right track, and the heavy-duty die forging press that is in full swing and will soon carry out research and development work in the name of "pre-research"——

Professor Yan Yongnian of Qinghua University is currently sorting out the remaining design data of the previous semi-finished machine, and contacting some old comrades who had participated in that project and are now interested in rejoining the construction of die forging presses.

In fact, Chang Haonan has even set to hold the first working meeting of the die forging press R&D team on the last day of October.

……

Just when Chang Haonan was trying his best to advertise the TORCH Multiphysics software and the numerical computing business of the Torch Group.

Guizhou Province, Yunma Factory.

The prototype of the J-9, painted in red and white, was quietly parked at the end of the take-off runway, and several auxiliary vehicles providing power and air were parked next to it, with thick pipes connected to the aircraft.

The front and rear canopies of the aircraft are flipped open to the right, and two boarding ladders are on the left side of the fuselage, apparently waiting for the pilot to board.

The scale of Yunma Factory is more than a little smaller than that of its counterparts in Shengjing, Haojing or Rongcheng, and it is located in the mountains, and the supporting airport is also relatively cramped.

Therefore, the maintenance of the aircraft is generally carried out directly on the runway.

Anyway, there may not be a chance to take off a plane here in the past month......

Sun Huizhong, the chief designer of the Jianjiao-9, was standing in the command station not far from the plane, deploying preparations for this test flight.

Actually, today is not the first flight of this model.

The test flight of the Jianjiao-9 has been carried out "secretly" for almost half a month.

Of course, this does not mean that Guihang even has to keep its brother units secret.

It's really that this aircraft hasn't made too many waves in the industry, and even in the circle of military fans and aviation enthusiasts, only the most senior group of people have paid attention to it.

Technically, the Jianjiao 9 can indeed be counted as the most ultimate improved version with a direct lineage to the MiG-21.

But for the current Huaxia aviation industry, no matter how much the MiG-21, that is, the J-7, is changed, it is not enough to make everyone interested.

To put it simply, the taste is raised.

Considering the relatively remote geographical location of Yunma Factory, not to mention from the capital, even from the provincial capital, it will take a lot of effort.

Not even a wall-climbing party.

In short, the first flight half a month ago was quite low-key, and it was not even as good as the prototype off-assembly ceremony attended by provincial leaders.

Of course, the Jianjiao 9 is one thing for the entire aviation industry system, and another thing for your aviation industry.

This can be said to be the most critical moment for Guihang to save himself and survive, if he didn't tremble and understand, then I'm afraid even Chang Haonan wouldn't be able to save them.

Therefore, Sun Huizhong, the chief engineer, and Lin Haijun, the general manager of Guihang, seized almost any possible opportunity to show the aircraft to potential users.

The reason why this plane was painted with all the bells and whistles in front of him was because today, Wu Guohui, the captain of the Bayi Air Show Brigade, would come in person to experience the flight performance of this prototype.

Today, the model of the Bayi performance team is J-7EB, which is the performance model of J-7E, and it is also one of the main models of the Huaxia Air Force.

In all fairness, the performance aircraft born from the J-7E can basically meet the needs in terms of low-altitude and low-speed performance.

But the air show is not just about showing off the aerobatic maneuvers and the pilot's superb flying skills - if only from the perspective of flying aerobatics, then no jet is as good as those propeller-powered special aerobatic aircraft.

More importantly, it is necessary to show the demeanor and strength of the People's Air Force, including the China Aviation Industry, through air shows.

And from this point of view, the J-7EB is a bit insufficient.

Even for viewers who don't know much about Air Force equipment, it is not difficult to see that this is not a very advanced fighter.

As a result, the Bayi performance team has been looking for a model that at least looks more advanced.

At present, the most advanced main battle model in the hands of the Air Force is the J-8C, which was finalized last year.

But even after Chang Haonan's explosion, the J-8C with interceptor pedigree is really not suitable as a performance aircraft.

The mobility is strong enough, but the agility and precision of the reflexes are still a little lacking.

And it's a bit too expensive......

At this time, it was just in time for Jianjiao 9 to be established as the inlet verification model of Project No. 10.

Lin Haijun keenly saw this opportunity and put the draft design of the aircraft on the desk of the Air Force leadership.

Overall, the J-9 is far more maneuverable than the original J-7EB, and the two-person cockpit also allows a flight photographer to accompany the flight.

More importantly, it is at least a "pointed-head aircraft".

For the less knowledgeable audience, it looks like the F16 used by the American Thunderbirds.

After all, when an airplane is moving in the sky, most of the time it can only see an outline.

So, there was this experience flight.

Moreover, Lin Haijun has the essence of eating two fish.

At this moment, on the management platform in the distance, there were several people with obvious foreign faces standing beside him, all holding a telescope in their hands.

Apparently also here to watch this flight.

……

Not long after, Wu Guohui, who had already changed into flight gear, and another test pilot boarded the plane one after the other.

Along with this Jianjiao-9, there was another Jianjiao-7.

The latter will assist the No. 01 prototype to show Wu Guohui a "unique stunt" of Jianjiao 9. ”

Wu Guohui is not a full-time test pilot, but as the captain of the performance team, he also has an astonishing flight time of more than 5,000 hours, so he has adapted to the new aircraft quickly.

Ten minutes later, two planes rose into the sky at the end of the runway, one after the other.

Just this simplest action, pulling up the nose and climbing, let Wu Guohui in the front seat experience the extraordinaryness of this aircraft.

Not to mention that the take-off distance ratio is shorter, the throttle and pole position response are also much more sensitive than the J-7EB that he is used to.

The turbojet 14B does not have full authority digital electronic control function, and this progress is entirely due to Chang Haonan's redesigned compressor, the more efficient DSI intake tract on the J-9, which allows the engine to adjust the working state at a faster speed without falling into surge.

It's a bit like a person's lung capacity is bigger, their lung function is healthier, and their exercise level is improved even though their muscle mass doesn't change.

After experiencing several throttle increases and decreases in a row, Wu Guohui roughly mastered the operation rules of this aircraft.

Of course, his own rich experience is one thing, but more importantly, it is really easy to open the Annihilation 9.

Due to the presence of fly-by-wire flight control, the overall handling of this aircraft tends to be linear, which is very intuitive.

Even if you are a novice, you can quickly control it.

It is indeed a good foundation as a training aircraft.

Wu Guohui, who had itchy hands, climbed the plane to a safe altitude and prepared to try a few aerobatic maneuvers.

Before taking off, he already knew that today's flight was still watched by potential foreign customers.

Therefore, before making a move, Wu Guohui specially adjusted the direction so that the plane passed horizontally through the front and upper part of the management console.

At the moment when Jianjiao-9 swept over the runway, he quickly pulled the lever back with his right hand, and at the same time controlled the throttle valve with his left hand to prevent the plane from entering a rapid climbing attitude.

After a brief moment of overweight, the two pilots crossed the midday sun and set on the horizon behind them.

They "lay" almost on the back of their seats in a position with their heads slightly down.

From the outside, especially from the side viewing platform, the nose of the aircraft rises to about 100-110° almost instantly, forming a posture with the tail in front, the nose in the rear, and the fuselage almost erect, but still flying forward.

In addition to being shocked, Lin Haijun did not forget to pay attention to the reactions of the bigwig gold owners next to him.

As expected, several people opened their mouths in unison, holding binoculars, and almost stood in place.

Cobra Maneuver!

(End of chapter)