Chapter 1406 Preparing to give a big 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 have been more than ten years ago, someone had 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 wood material with strong wave transmissiveness as the matrix, with periodic 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 negative refractive effect at the macro level. It is completely different from the homogeneous materials we are currently studying."
Hearing this In Li Yabo's eyes, some expectations appeared: "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 test arrangement.
All preparations before the first flight are still being promoted step by step.
Until the Spring Festival approaching, 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 removing the 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 took off 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 also learn from Americans at the publicity level."
The former suddenly spoke:
"This is brightly lit, and it is inevitable to include the pipes, cables and equipment in the workshop when taking photos. Not only is it not conducive to confidentiality, the background is messy and not good-looking, but if the floodlight is turned off, the background is darker, and then use the spotlight to hit a few light columns on the plane, and then put a little angle, the effect will definitely be much better than it is now..."
"Well..."
Liu Yongquan nodded in agreement, but it was full of perfunctory meaning, obviously 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 field test?"
Because he has never experienced such a thing, 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 we neither take off nor skid today. We just let the pilot adapt to the outdoor environment, and conduct the cabin start-up test... The aircraft itself will not rely on autonomous power, so don't worry."
At the same time, the full-movement canard and vertical tail of the 2001 aircraft began to deflect, drawing a beautiful trajectory in the buzzing 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 passenger aircraft registered 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 rod 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:
"Go away!"
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 have always wanted to ask." Liu Yongquan turned around and looked at the door of workshop No. 1.
A old-fashioned bicycle was parked there that was a bit out of place with the surrounding environment:
"This 28-bar has been parked here since last night. The safety officer told me not to move. Is it a special function?" Yang Wei put down the intercom:
"It's not a 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 bicycle, kicked the frame quickly, and then sat up:
"So I'm going to inherit this tradition."
Liu Yongquan showed a shocked expression:
"Is this?"
"Of course it's impossible."
Yang Wei exerted his right leg and slid out on the bicycle:
"The bicycle is in our group's exhibition hall..."
...
Because there was only 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 most new ⊥小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小�
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. Li Gang's voice soon came from the radio:
"The electrical supply is normal!"
" Activate the flight control system..."
"..."
"..."
At the moment when the 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 2001 verification machine successfully started independently in the cockpit]
"Old Liu."
Yang Wei's voice suddenly sounded behind him, and the deliberately raised volume even over the whistling of the engine:
"I started working late, so I want to confirm with you whether the early model of the turbojet 7 engine was equipped with some Su-made parts?"
Liu Yongquan's face flashed with a hint of confusion, but he still thought for a moment, and then replied: "If you have to say it, the initial turbojet 7 was actually the assembled Р11Ф-300. Although the quantity was very small, the following mass production batches did use some parts obtained through special channels, but by the latest 1980s, it had been completely domestically produced..."
After saying that, he looked up at the other party:
"Why suddenly ask this?"
Yang Wei smiled:
"Because I'm wondering if the J-20 is the first model that has already been used in national power production during its first flight."
He rarely takes the initiative to mention these records, but he is definitely not really unwilling to 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 the other party's slightly dim eyes, he changed his tone again: "But the thrust of that engine is 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 are 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.
Liu Yongquan continued the excuse just now: "The first flight ceremony, you have to invite Mr. Chang... 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 long time ago:
"Just treat it as giving them a Spring Festival gift."
(End of this chapter)
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