Chapter 1406 Preparing to give a gift


    Chang Haonan''s speculation caused Li Yabo to be silent.


    After about half a minute, he left the state of thinking and said:


    "I remember a few years...it should be more than ten years ago, someone had already achieved negative refraction in the microwave band..."


    The former nodded with satisfaction:


    "Yes... Strictly speaking, it was thirteen years ago, but the implementation method was more opportunistic. It was made of a wooden material with strong wave transmissiveness as the matrix, with a periodic arrangement of metal strips and an open C-type metal resonant ring, allowing microwaves to reflect controlled in these structures, which is essentially equivalent to introducing microwaves into a maze, thus reflecting the effect of negative refraction at the macro level. It is completely different from the homogeneous materials we are currently studying."


    Hearing this, some expectation appeared in Li Yabo''s eyes:


    "It is not difficult to test the refractive index. If a material has a negative refractive index, then the incident and refracted light at both ends of its interface will be on the same side of the normal, rather than on both sides of the normal like conventional materials. The only problem may be that the light transmittance of this metal-based coating is too poor, and the sample needs to be made very thin..."


    “…”


    …


    The amount of HDK305 coating material used on the turbofan 10G is no more than 0.5%, and it is less than one thousandth of the entire J-20, and it does not affect flight safety.


    What''s more, the power installed on the 2001 machine is still the old model turbofan 10A, which has nothing to do with the new materials.


    Therefore, a series of storms that took it as the starting point did not affect the J-20''s testing arrangements.


    All preparations before the first flight are still being carried out step by step.


    Until the Spring Festival approached, with the final determination of a US Department of Defense delegation''s trip, the superiors finally issued an order to allow the field test to start and take the first flight in late February.


    The long-silent Huangtianba Airport finally became lively again.


    January 23, 2009.


    Deep in the assembly workshop No. 1, the No. 2001 machine, wrapped in a camouflage rainproof cloth, is losing its last layer of protection, ready to show the world its slim and elegant figure.


    At the entrance of the workshop, Yang Wei and Liu Yongquan watched as the technicians uncovered the canopy cover cloth and removed the cover plates at the air inlet and tail nozzle. The tiny dust raised by the movement swayed and danced in the beam of light cast by the ceiling light.


    A photographer whose fisheye lens was confiscated was squatting beside him, preparing to use the lens to record the scene of the plane''s departure moment.


    "I think in addition to technology, we should learn from Americans at the publicity level."


    The former suddenly spoke:


    "The lights are bright, and it is inevitable to include the pipes, cables, equipment and other things in the workshop when taking photos. Not only is it not conducive to confidentiality, but the background is messy and not good-looking, but if the floodlights are turned off, the background is darker, and then use the spotlight to drop a few light columns onto the plane, and then put some angles on it, the effect will definitely be much better than now..."


    "Um…"


    Liu Yongquan nodded in agreement, but it was very perfunctory. Obviously, his mind was not on this matter:


    "I said to Lao Yang, the weather forecast said that the cloud base is only 300 meters high today. Is it really okay to do the outfield test?"


    Because he hasn''t experienced such a thing much, he is actually more worried about safety issues than the other party.


    Yang Wei was stunned when he heard this, then smiled and shook his head, comforting:


    "The height of the cloud bottom is indeed low, but the visibility is pretty good. And today we neither take off nor skid. We just let the pilot adapt to the outdoor environment and conduct in-cabin start-up tests... The aircraft itself will not rely on autonomous power, so don''t worry."


    At the same time, the full-action canard and vertical tail of the No. 2001 machine began to deflect, drawing a beautiful trajectory in the humming of the hydraulic actuator—


    That is the fighter''s active stability control system is executing the self-test program.


    This program component, first developed by Chang Haonan, was first tried thirteen years ago, and helped the No. 1001 J-10 prototype avoid a potential engine scrapping risk.


    Since then, similar systems have been quickly installed on all new models, including transport aircraft to primary trainers, and their functions have gradually expanded from simply protecting aircraft engines to protecting all subsystems of the aircraft.


    In addition, CAAC is also negotiating with EASA, hoping to introduce this capability into the civil aviation industry and become a mandatory safety configuration for registered passenger aircraft in China and the EU.


    Of course, since Huaxia is basically a unique device in aircraft active control technology, the negotiation process is extremely difficult.


    EASA cannot accept that all flight control systems of passenger planes will be handed over to Huaxia before registering. It hopes that Huaxia can open source or authorize the civilian version of the program. For this reason, it would even prefer to make concessions on the airworthiness certification of the second-generation C909NG.


    Twenty minutes later, the last inspection procedure before the plane left the factory ended. The ground crew leader waved the fluorescent stick to guide the tractor into the station, and then directed several other people to hang the traction rod on the front landing gear of the plane.


    Yang Wei picked up the walkie-talkie from a small table next to him and took a deep breath:


    "Set off!"


    The engine of the aircraft tractor made a low roar, dragging the slender body of the No. 2001 aircraft, which was more than 20 meters long, slowly started.


    "I''ve always wanted to ask."


    Liu Yongquan turned around and looked at the door of workshop No. 1.


    There is an old-fashioned bicycle that is a bit out of place with the surroundings:


    "This 28-bar has been parked here since last night. The security officer also told me not to move. Is it a special function?" Yang Wei put down the intercom:


    "It''s not a good function, but when the J-10 first left the workshop, Mr. Xue rode a 28-bar and opened the road in front..."


    He said as he walked towards the bike, kicked the frame quickly, and then straddled:


    "So I''m going to inherit this tradition."


    Liu Yongquan showed a shocked expression:


    "Is this one?"


    "Of course it''s impossible."


    Yang Wei exerted force on his right leg and slid out on his bicycle:


    "That bicycle is in our group''s exhibition hall..."


    …


    Because there was only a sleet two days ago, there was still some water remaining on the edge of the apron, reflecting the lead-gray sky.


    Three electrical auxiliary vehicles surround the fighter plane like roaring monsters, providing the latter with the energy and power necessary for ground work.


    The newest ⊥Xiao⊥Speak⊥Send⊥Six⊥9⊥Book⊥⊥⊥⊥Back⊥⊥⊥⊥!


    Of course, the J-20 is equipped with an auxiliary power unit (IPU) that can be started independently, but it will definitely not be used at this stage.


    When Li Gang, a test pilot wearing an anti-Dutch suit, stepped into the plane along the boarding ladder, Liu Yongquan noticed that the super pilot''s movements were stagnant for a moment.


    Although I have experienced countless experiences on simulation equipment before, after truly entering this futuristic cockpit, I am still shocked by the neat and clean layout in front of me and the two super-large monitors.


    "The cockpit is powered on, and the operating procedure is started!"


    After all, he is an experienced old test pilot, and Li Gang''s voice soon came from the radio:


    “The electrical supply is normal!”


    "Flight control system activation..."


    “…”


    At the moment when the roar of two turbofan 10A engines tore through the humid air, Liu Yongquan subconsciously raised his wrist and looked at the watch, and then recorded a piece of content on his laptop—


    [At 9:08 am on January 23, 2009, the turbofan 10A engine equipped with the No. 2001 verification machine successfully achieved independent start in the cockpit]


    "Old Liu."


    Yang Wei''s voice suddenly sounded behind him, and the volume deliberately raised even over the engine''s howling:


    "I started working late, so I want to confirm with you whether the early models of Turbojet 7 engines were equipped with some Soviet-made parts?"


    A hint of confusion flashed across Liu Yongquan''s face, but he still thought for a moment and replied:


    "If you have to say it, the initial turbojet 7 was actually the assembled Р11Ф-300. Although the quantity was very small, the subsequent mass production batches did use some parts obtained through special channels, but by the latest 1980s, it had already been completely domestically produced..."


    After saying that, he looked up at the other party:


    "Why ask this suddenly?"


    Yang Wei smiled:


    "Because I''m wondering if the J-20 is the first model to use national power when it was first flight."


    He rarely takes the initiative to mention these records, but he is by no means he really doesn''t care.


    "Um-"


    Liu Yongquan pondered for a moment:


    "Strictly speaking, the J-College 1, which was the first flight in October 1958, used a completely domestic eruption 1A engine..."


    Noting that the other party''s slightly dim eyes, he changed his mind again:


    "But that engine has a thrust of only 1.6 tons, and its reliability and life are not too accurate. Moreover, the J-College 1 itself has only built three prototypes, which is far from the stage of qualitative production... So the J-20 should be considered the first of the official models..."


    Yang Wei did not reply immediately, but the expression on his face undoubtedly showed his satisfaction.


    But Liu Yongquan continued the excuse just now:


    "The first flight ceremony, you have to invite Mr. Chang to come... and the old seniors who have participated in the No. 10 Project before, such as Mr. Song and Mr. Xue."


    He said and photographed the seat of the 28-bar.


    "Don''t rush this, wait for two more days."


    Yang Wei obviously had a curse:


    "Just treat it as giving them a Spring Festival gift."


    (End of this chapter)