Chapter 499 Accidentally made a Cobra maneuver (fourth update, please give me a monthly ticket!)
The general helicopter improvement project in Bingcheng, after a little care, Chang Haonan handed it over to Liu Hongbo Did it.
The Zhi-9 platform is, after all, a 4-4.5 ton medium-sized helicopter, and it is a relatively mature design from France. Even if it is modified, the risk will not be great.
The most it can do is fail to meet the design requirements.
It’s not like it hasn’t happened before.
The first armed variant of the Zhi-9, which is the Zhi-9W in that document, finally passed the acceptance test after lowering the design specifications.
Besides, Institute 602 has made it clear that this improved version still will not make radical changes to the basic design of the Z-9, so there is nothing to worry about.
Others in the Torch Group need to learn to stand on their own.
This is a good opportunity to practice your skills.
After all, for Chang Haonan, the two most important things right now are the turbofan 10, which is already on the right track, and the intensive preparations, which will soon begin in the name of "pre-research". Heavy-duty die forging press——
Professor Yan Yongnian of Qinghua University is currently sorting out the remaining design data of the previous semi-finished product and contacting some old comrades who have participated in that project and are now interested in rejoining the construction of die forging presses.
In fact, Chang Haonan has even decided 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 TORCH Multiphysics software and Torch Group's numerical calculation business.
Qian Province, Yunma Factory.
The No. 01 prototype of the JJ-9 was painted in red and white and was parked quietly at the end of the takeoff runway. Several auxiliary vehicles providing power and air sources were parked next to it, connected to the aircraft by thick pipeline.
The front and rear canopies of the aircraft were opened to the right, and two boarding ladders were erected on the left side of the fuselage, apparently waiting for the pilots to board the aircraft.
The scale of Yunma Factory is more than a little smaller than its counterparts in Shengjing, Haojing or Rongcheng. In addition, it is located in the mountains, and the supporting airport is also relatively cramped.
Therefore, the maintenance work of the aircraft is usually carried out directly on the runway.
Anyway, there may not have been a chance to take off a plane here in the past month...
Sun Huizhong, the chief designer of the JJ-9, is standing in the command station not far from the aircraft, deploying preparations for this test flight.
Actually, today is not the first flight of this model.
The test flight of JJ-9 has been carried out "secretly" for almost half a month.
Of course, this does not mean that Guizhou Airlines and its sister units must keep it secret.
In fact, this aircraft failed to make too many waves in the industry. Even in the circles of military fans and aviation enthusiasts, only the most senior group of people paid attention to it.
Technically speaking, the JJ-9 can indeed be regarded as the ultimate improved version that has a direct lineage with the MiG-21.
But for the current Chinese aviation industry, no matter how modified the MiG-21, that is, the J-7, is not enough to interest everyone.
To put it simply, the taste has been spoiled.
Taking into account the relatively remote geographical location of Yunmachang, it takes a lot of effort to get here from the provincial capital, not to mention from the capital.
There are not even wall-climbing parties joining in the fun.
In short, the first flight half a month ago was quite low-key, not even as good as the prototype roll-out ceremony attended by provincial leaders.
Of course, the JJ-9 is one thing for the entire aviation industry system, but it is another thing for your aviation industry.
This can be said to be the most critical step for Guihang to save itself. If Suo Sui didn't understand it, then maybe even Chang Haonan wouldn't be able to save them.
For this reason, Chief Engineer Sun Huizhong and Guihang General Manager Lin Haijun seized almost every possible opportunity to demonstrate the aircraft to potential users.
The reason why this aircraft is painted to look as fancy as it is is because today, Wu Guohui, the captain of the Bayi Aerobatic Group, will come in person to experience the flight performance of this prototype aircraft.
The model currently equipped by the Bayi Performance Team is the J-7EB, which is the performance model of the J-7E and one of the main models of the Chinese Air Force.
To be fair, the performance aircraft derived from the J-7E can basically meet the needs in terms of low-altitude and low-speed performance.
But the flight show is not just for showing wonderful stunts and the pilot's superb flying skills - if it is just from the perspective of flying stunts, then any jet aircraft is not as good as those propeller-powered ones. Specialized aerobatic aircraft.
The more important point is to show the style and strength of the People's Air Force, including the Chinese Aviation Industry, through flight performances.
From this perspective, the J-7EB is a bit unsightly.
Even viewers who don't know much about air force equipment can easily tell that this is not a very advanced fighter aircraft.
So, the Bayi Performance Team has been looking to replace it with 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 some radical changes by Chang Haonan, the J-8C, which is an interceptor aircraft, is really not suitable as a performance aircraft.
The mobility is strong enough, but the agility and reaction accuracy are still a bit lacking.
Besides, it’s a bit too expensive...
At this time, the JJ-9 happened to be approved as the inlet verification model of Project 10.
Lin Haijun keenly discovered this opportunity and put the draft design of the aircraft on the desk of the Air Force leaders.
In general, the maneuverability of the JJ-9 is far superior to that of the original J-7EB, and the two-person cockpit also allows a flight photographer to take accompanying photos.
The more important point is that it is at least a "pointed aircraft".
To the less knowledgeable audience, it even looks similar to the F16 used by the American Thunderbirds performance team.
After all, when an airplane makes movements in the sky, in most cases only its outline can be seen.
So, this experience flight came about.
Furthermore, Lin Haijun has mastered the essence of eating two things with one fish.
At this moment, on the management platform in the distance, there were several people with obviously foreign faces standing next to him, all holding a telescope in their hands.
Obviously I came here to watch this flight.
......
Not long after, Wu Guohui, who had changed into flight equipment, and another test pilot boarded the plane one after another.
Take off together with this JJ-9, and there is another JJ-7.
The latter will assist the No. 01 prototype and show Wu Guohui a "unique stunt of the JJ-9."
Wu Guohui is not a full-time test pilot, but as the captain of the demonstration team, he has an astonishing flight time of more than 5,000 hours, so he adapted to the new aircraft quickly.
Ten minutes later, the two planes rose into the sky at the end of the runway, one after the other.
Just this simple action, pulling up the nose of the plane to climb, allowed Wu Guohui in the front seat to experience the extraordinary power of this aircraft.
Not only is the take-off distance shorter, but the throttle and pole response are also much more sensitive than the J-7EB he is used to driving.
The turbojet 14B does not have a full-authority digital electronic control function. This progress is entirely due to Chang Haonan’s redesigned compressor and the more efficient DSI air intake on the JJ-9, allowing the engine to operate faster. The speed adjusts the working state without falling into surge.
It is somewhat similar to a person's lung capacity becoming larger and lung function becoming healthier. Although the muscle mass does not change, the level of exercise will still be improved.
After experiencing the increase and decrease of the throttle several times in a row, Wu Guohui roughly mastered the operating rules of this aircraft.
Of course his rich experience is one aspect, but more importantly, JJ9 is really easy to play.
Due to the existence of fly-by-wire flight control, the overall control of this aircraft tends to be linear, which is very intuitive.
Even a novice can master it quickly.
It is indeed a good foundation as a trainer aircraft.
Wu Guohui, who had itchy hands, climbed the plane to a safe height and prepared to try a few aerobatics.
Before taking off, he already knew that there were potential foreign customers watching today's flight.
Therefore, before making the move, Wu Guohui specifically adjusted the direction so that the plane passed horizontally above the front and top of the management desk.
At the moment when the J-9 flew across the airport runway, he quickly pulled the stick back with his right hand, while controlling the throttle with his left hand to prevent the aircraft from entering a rapid climbing attitude.
After a brief feeling of overweight, the two pilots' eyes crossed the midday sun and landed on the horizon behind them.
They were almost "lying" on the back of the seat in a slightly head-down position.
From the outside, especially from the viewing platform on the side, the nose of the aircraft tilts up to about 100-110° almost instantly, forming a pattern where the tail is in front, the nose is behind, and the aircraft is The fuselage is almost upright, but it is still flying forward.
While being shocked, Lin Haijun also did not forget to pay attention to the reactions of the wealthy financial backers next to him.
As expected, several people opened their mouths in unison, holding telescopes, and almost stood there.
Cobra maneuver!
(End of this chapter)