The turbojet 13 engine in the tail let out a roar, and only after turning on the afterburner, the sound can still be heard, but compared to the previous deafening, the sound is now much smaller.

Qin Feng's fighter began to climb, anyway, now the fuel is sufficient, and it was originally to test the maximum speed of the flight, so you can always turn on the afterburner, Qin Feng's favorite is also this feeling, especially the turbojet engine, which is naturally suitable for high altitude and high speed, the higher the altitude, the more stable the work of the engine, and the stronger the explosive power.

What would it feel like to install two F404s in the tail of the J-8? The maximum military thrust of the F404, that is, the thrust when the afterburner is not turned on, has already exceeded the turbojet 13 in the full afterburner state! Then, if you don't turn on the afterburner, you can let the J-8 fly to supersonic speed, of course, although the power at the maximum afterburner is also quite strong, but the maximum speed will not necessarily increase, because the turbofan engine is inherently not suitable for high speed, and after the speed is high, the outer duct will have resistance.

The maximum speed may even be reduced, however, the pursuit of this maximum speed is not much use, the speed is fast, the speed is violent, this is more important, you can fly supersonic without turning on the afterburner, which means that this kind of fighter can fly in a supersonic state for a long time, instead of just a few short minutes, you have to consume all the fuel, in this way, you can quickly reach the battlefield, it is very useful, it is for this reason, so, when the Americans are studying the fourth generation aircraft, Supersonic cruise is used as a hard indicator.

Now, in Qin Feng's thinking, the Jian-8 is still continuing to climb upwards rapidly, with a height of more than 10,000 and a speed that has begun to exceed the speed of sound.

When the speed of sound is exceeded, there is noise in the noise-canceling headphones, and this noise is coming from the air refueling pipe in front!

The speed is still increasing, the noise is also increasing, and the high-frequency sound, even if the decibel is not high, can stimulate the eardrum of the person, which is very uncomfortable.

Qin Feng insisted and continued to accelerate.

Mach 1.5, Mach 1.6, Mach 1.7, the ears were almost deafened, Qin Feng looked at the pointer of his airspeed counter, at Mach 1.7, it almost stopped!

At this time, the turbojet 13 in the tail has burst out with the maximum thrust, and half of the fuel in the fuselage has been burned off, and the speed of the fighter in this state should have been able to exceed Mach 2.2, but after this small refueling pipe was added, it had a great impact on the fighter, resulting in the maximum speed of the fighter, which could only hover at a speed of Mach 1.7, and the maximum speed could not exceed Mach 1.8!

After continuing to hold on for thirty seconds, Qin Feng turned off the afterburner.

"001 report, maximum speed 1.7, noise, tolerable." When Qin Feng was talking, he felt that his ears were constantly ringing, and the noise caused by the air refueling pipe had surpassed that of a chainsaw, and he felt that he couldn't hear anything.

At the risk of the damage that his body might suffer, Qin Feng flew out of the maximum speed of this aircraft, the altitude is 10,000, the speed is Mach 1.7, and if it flies to an altitude of 20,000 meters, the speed will reach Mach 1.8 at most!

In order to increase the ability to refuel in the air, its maximum speed has been reduced a lot, but it is still acceptable compared to the long range obtained.

As a fighter, it is embarrassing to say hello if it can't fly Mach 2, but many third-generation aircraft no longer pursue high speed, for example, the F-16 fighter can fly to Mach 2, but due to the fixed air intake, this kind of aircraft continues to accelerate after exceeding Mach 1.6, which is quite difficult.

As for other aircraft, such as Tu Lao, they made the Super Seven, and the maximum speed was originally set between Mach 1.7 and Mach 1.8.

As a fighter, the pursuit of maximum speed has given way to the improvement of maneuverability, and the air resistance of the third-generation aircraft is generally very large, although the engine thrust is full, it is not as good as the maximum speed of the second-generation aircraft.

Of course, this still has an impact on the operation of the J-8, the most accurate positioning of the J-8, in fact, is an air defense interceptor, once the enemy's bomber invades its own airspace, emergency take-off interception, at this time, is to fly to supersonic speed, the faster the better, but, after the installation of four missiles, the maximum speed will definitely be reduced, and, since it is added to the air refueling tube, the main task is not a quick volley, but a long-term cruise, or to perform a long-distance mission, in this kind of mission, There is almost no need to fly at supersonic speeds, that way of flying, it is too fuel-burning.

Relying on this noise-canceling helmet, it is acceptable to fly at this speed for the time being, but another consequence is not acceptable.

After Qin Feng flew to the maximum speed, he began to change out, and then, like last time, he stepped on the rudder and pushed the operating stick, and with his operation, the fighter began to quickly turn to the left!

Was it an accident or an inevitability last time? Is it because of this refueling tube? Just try again!

With his operation, the J-8 fighter began to turn rapidly to the right, and sure enough, with his turning, the tachometer of the right engine quickly fell back.

The noise-canceling headphones can't hear any difference, so according to the engine tachometer, as I speculated, it must be due to the airflow interference caused by the fuel pipe, and in the supersonic state, its shock wave affects the air intake at the back!

Qin Feng had long been familiar with the mid-air parking of the Jian-8's engine, and while restarting the engine with ease, he began to return home.

"001 reports, right-hand stopped, has now restarted the engine, and requested a test turn right." Qin Feng shouted.

When turning left, the right engine will stop, so when turning right, will the left engine stop?

The fuel of the engine, which was enough to complete a supersonic flight, aimed at the airport, Qin Feng began the second test flight, this time, when the speed reached the maximum, the afterburner was released, and the fighter completed a turn to the right.

It's strange that when turning right, the engine didn't have any problems and worked smoothly!

With the addition of an aerial refueling pipe, as long as the speed exceeds Mach 1.6, then turning left will cause the right engine to stop!

The two problems have all been exposed, and the next task is how to solve it! Piloting the J-8 fighter, Qin Feng returned.

Behind his fighter plane, the golden sunset was slowly sliding towards the horizon.