Rongcheng, 611.

On the test track, the yellow-skinned J-20 test aircraft numbered 2101 began to glide and was successfully lifted off under the impetus of two Russian-made AL31F engines.

Chief Engineer Yang Wei watched the No. 2101 test aircraft flying in a circle in the middle and thought about the future of the J-20.

Four years ago, the first prototype of the 2001 aircraft made its first flight.

According to estimates, the first batch of J-20 will be finalized and put into mass production around next year.

But in service there is another problem: the engine.

The turbofan 15 "Emei" engine designed for the J-20 now seems to continue to be difficult to deliver, not because of the technical difficulty, but because the indicators are improving.

Now the J-20 prototype still uses AL31F, although there is a turbofan 10 available, but it is not mature enough.

The turbofan 10 is a tortuous product, at first Huaguo obtained the design of the Aramco F110 engine and core engine, and then felt that as long as he put a shell and an outer duct, it would be good to put the shell of the AL31F on.

As a result, the turbofan 10 prototype was a disaster, the kind that could spray parts out.

Later, it was changed, and the turbofan 10A was finally stabilized and used in the J-11 series, but I still didn't dare to use it for the J-20, it would be too uncomfortable for this plane to fall, so let's wait.

However, next year's mass production model will have to use a turbofan 10A or other improvements, and the fourth-generation aircraft will also buy AL31F, which is really a bit of something.

But now Yang Wei is not thinking about the turbofan 10 and AL31F, but the XW-9 produced by Xinyuan.

After reaching an in-depth cooperation with the desert base, Xinyuan proposed that their XW-9 was not available as a test aircraft, and hoped to draw a high-altitude and high-speed aircraft from the Air Force to take it over for modification and verification.

High-altitude and high-speed, that is naturally the old and strong eighth master, so the military transferred a J-8F from the Rongcheng Military Region.

Not to mention, although the J-8F's engines are two turbojet 13, it stands to reason that turbofan engines with a thrust of more than 10 tons cannot be installed, but the XW-9 is really small and just enough to be stuffed.

When the J-8F flew to the B-level base for modification, Yang Wei also got the news and got the parameters of the XW-9, and then he was very surprised.

The afterburner thrust of 139KN, that is, 13.9 tons, is already on par with the AL31F, but there is still a gap with the thrust of the turbofan 10C and 145KN that are being improved, and there is no need to introduce XW-9 just by looking at this.

But the XW-9 is very special, it is designed for high altitude and high speed, and the engine working conditions can support normal operation at 3.4 times the speed of sound at an altitude of 33,000 meters!

3.3 three meters, 3.4 times the speed of sound! That is, the double-three-three indicator!

The SR71 Blackbird reconnaissance aircraft is not so fast!

Moreover, the XW-9 has a very small duct ratio, and it can be completely stuffed into the body of the J-20.

If the J-20 is properly modified, equipped with two XW-9 engines, and some high-altitude and high-speed optimization, is it possible to develop a volley/reconnaissance model?

Don't think that the speed and altitude of modern air combat are not important, with the advantage of stealth fighters, combined with such altitude and speed, it will have a huge advantage over aircraft of the same generation.

A few days later, Laba, January 17, 2016.

The B-class base, a J-8F with a gray and white body, and the surface of the fuselage, including the cockpit, is covered with reduced heat insulation tiles, and is ready to take off on the runway.

The J-8F has a maximum flight speed of Mach 2.2 and a maximum ceiling of 22,000 meters.

After Xinyuan's engineers replaced the two XW-9s, they pasted the J-8F's fuselage and joints with hand-cut and adapted heat insulation tiles to improve the ultimate flight speed.

Anyway, just to test the XW-9, this J-8F was scrapped and scrapped, and it didn't cost money to buy it, and the Air Force gave it away.

After obtaining the SC09, Xinyuan is also convenient for various flight tests, without the test pilot risking his life to fly to the limit, it is a big deal to lose a few X32035, and the pilot's life support system can be dismantled to reduce weight.

At 10 o'clock in the morning, the empty weight of this magically modified unmanned J-8F was only 12 tons, but the two XW-9s provided 16 tons of thrust without afterburner, so the take-off was also quite aggressive, and it climbed directly at a large elevation angle.

With the blessing of the engine, the J-8F, which is not good at low-altitude maneuvers, can also make all kinds of maneuvers, and the radar station of the Rongcheng Military Region is watching it climb up at an angle of nearly 40 degrees.

Since it was daytime, the tail flame of the XW-9 could not be seen very clearly, but the deep blue of the two-day engine vent in the tail of the J-8F could be seen.

On the ground, the person in charge of the aviation development department looked at Wang Xun uncertainly:

"Can this thing you transform with the J-8F really fly to Mach 2.8? Don't let me fall, it's a suburb of the city, and two XW-9s aren't cheap. ”

"Don't worry, if it's manned, then I can't, but no one can guarantee for sure."

Wang Xun looked confident: "I removed most of the structure, and all the key pipeline oil circuits were strengthened, 26,000 meters, Mach 2.8 insisted on 15 minutes, absolutely no problem, but the temperature in the body was relatively high." ”

"How tall?"

"It's 43 degrees, it's not impossible to carry people, but you must wear a spacesuit and connect to the air conditioner, otherwise you will die of heat."

“……”

At this time, the J-8F has already flown to 23,000 meters, and the two engines have just started afterburner!

In addition to entering the combustion chamber, the fuel is also directly injected into the nozzle at the rear of the engine, and the atomized fuel is immediately mixed and burned when it encounters high-temperature gas, and the thrust increases sharply.

The speed of this 29-year-old aircraft instantly exceeded Mach 2.5, turning into a bright dot on the radar, moving quickly on the screen.

At the radar station of the Rongcheng Air Force, the attendant saw that the altitude of the No. 82101 test aircraft jumped from 23,000 meters to 28,000 meters, and the speed increased to Mach 2.93 in just a few minutes!

Xinyuan's ground command center found that the J-8F was in a good state at 26,000 meters, and the sensors of the SC09 sensing body thought that it could continue to accelerate, so the ground simply let go and let the SC09 fly to the limit in the predetermined airspace.

Then in the flight that lasted 10 minutes, the maximum flight altitude of the J-8F reached 30,400 meters, the maximum flight speed reached an astonishing Mach 3.02, the highest temperature in the cabin was 65 degrees, and multiple electronic devices alarmed.

The shock wave sound generated by the test flight could be heard throughout Rongcheng, but they couldn't have imagined that it was a 30-year-old eighth master who made the noise.

Finally, when SC09 returned to prepare for landing, it was found that the nose landing gear was stuck due to the deformation of the high-temperature baffle, and it could only make a forced landing after several attempts to no avail.

The two main landing gears touched the ground, taxied for seven or eight hundred meters and then the nose slowly pressed down, and then the uneven friction caused the plane to deflect directly into the lawn, and the wing fuel tank, which had long been cracked due to the high temperature, was still leaking kerosene, which was immediately ignited by the frictional sparks and caused a fire, but fortunately, the fire truck was ready to rush up to extinguish the fire.

In the end, when Yang Wei and the leaders of the Rongcheng Air Force rushed over, they only saw the amazing J-8F lying on the lawn in frustration, with a piece of the wing black and a lot of heat insulation tiles on the fuselage, which looked miserable.

Seeing this scene, the leader turned around and held Yang Wei's hand:

"Such a high-altitude and high-speed aircraft is still very necessary, I am very sure that the Air Force needs a interception version of the J-20, buy it immediately!"

(End of chapter)