Turbojet-13, with a maximum military thrust of 4.3 tons and a maximum afterburner thrust of 6.6 tons, has a thrust-to-weight ratio of 0.87 and a full load of 0.72 in normal take-off, and in the case of air combat, it can reach about 0.97.

The thrust-to-weight ratio is different in different situations, that is because the weight of the aircraft is different, for example, now, this J-7E fighter, which is making its first flight, does not have any external plug-in, and the internal fuel is only half filled, 5.5 tons of dead weight, plus more than 1 ton of fuel, in this case, its thrust-to-weight ratio has almost reached the level of 1, which is completely the first time among domestic fighters.

Qin Feng turned on the afterburner and pushed it to the maximum position, and he could feel the roar of the engine in the tail, and then, the fighter plane was on the runway, quickly sliding up, and the rapid feeling of pushing back on the back made Qin Feng instantly have an illusion, this aircraft is as fast as the third-generation aircraft!

After sliding forward for less than 300 meters, the nose of the plane was already pulled up, and after another 200 meters, the entire fighter plane had already taken off! The moment the fighter left the ground, Qin Feng also felt that his heart was also taking off, this take-off action was too smooth, too fast, I couldn't believe that this was what Jian-Qi could do! In the past, it was definitely not up to this level, but this is the take-off feeling of a third-generation aircraft.

The thrust-to-weight ratio is close to 1, which is so fast!

Qin Feng turned his head back and glanced at it, just as he pulled it up, the leading edge of the wing maneuvering flap had already begun to bend downward, and it had already begun to deflect automatically under the action of the atmospheric data computer at this time, without human intervention at all.

This is also the cleverness of domestic technicians, who use this air data computer as a command computer for the mobile flap control system. The control law of the flap declination angle with the angle of attack and the Mach number is programmed into it, so that the automatic control of the flap is perfectly realized, and the degree of safety is quite high.

Under the action of automatic flaps, the aircraft's large angle of attack performance will be greatly improved, in the past, the angle of attack of the aircraft taking off can not exceed 30 degrees, otherwise the wing will stall, and then fall, but now, the leading edge of the wing downward, increasing the angle of attack, and then under the strong engine thrust, the fighter climb, also become rapid, Qin Feng's courage followed the increase, he carefully pulled the operating stick back, the fighter's angle of attack is getting bigger and bigger, and finally at the angle of attack of forty-five degrees, climb up, Although it is not as beautiful as reaching sixty degrees, it is the first time to climb at such an angle in a domestic fighter!

A simple climb can illustrate maneuverability

The tail engine is surging and rotating, pushing the fighter to climb continuously, the research and development of the turbojet-13 engine, Qin Feng has also experienced, the technical problems that appeared at that time are all condensed with the efforts of scientific researchers, and now, this engine has finally matured, and it is definitely the best choice to improve the existing J-7 and J-8, of course, it would be good if it could continue to increase the thrust.

Shenyang is developing turbojet-14, it is said that the index of this engine is quite high, the maximum afterburner thrust has exceeded seven tons, if this wind engine can be successfully developed, it will definitely give its own fighter better mobility, and it can even be said that it can also give its own super seven matching, Tu Lao will not have to be so busy looking for a suitable engine everywhere.

Now, Qin Feng put away these thoughts, since he was already in flight, he had to fly wholeheartedly, at an altitude of five hundred meters, he leveled the plane, and then, the lever pedaled the rudder, and began to change direction, this change of direction immediately surprised him, the plane was incredibly flexible!

The wingspan of the double delta wing has become larger, which has brought about an improvement in maneuverability, Qin Feng watched the scenery in front of him change rapidly, and at the same time he was thinking in his heart, the current angular speed has exceeded 25 degrees per second, and in less than four seconds, the plane has completed a ninety degree turn and completed the first turn of the predetermined airspace.

If in the air combat combat, this circling angular velocity is very important, who spins fast, who can take the initiative, the last confrontation with the F-16, always lose, is because their hovering angular velocity is not high enough, so, every time the other side turns, you can turn passive into active, chase behind yourself.

If it is this aircraft in your own hands, then you are confident, and you will definitely be able to go around a few more circles with the other party on the horizontal plane, even on the vertical plane, and you can also rely on the current engine to fight for a while.

Qin Feng was very confident in his heart, after he turned ninety degrees again, he re-aimed at the airport, and now, it was time to put on a show for everyone.

The first flight, doing such an action, is really enjoyable.

In everyone's attention, the J-7E flew back, its speed is very slow, and its altitude is also very low!

In the past, when the plane landed, it also had to fly to a speed of about 300 kilometers per hour, if the speed continued to decrease, the wing stalled, it is precisely because of the high take-off and landing speed of this kind of aircraft, so it is not easy to operate in the take-off and landing phase.

However, the J-7E has modified this problem, in the design, its minimum flight speed can reach 200 kilometers per hour, landing at such a speed, the danger will be greatly reduced, and the bearing capacity of the wheels will be better.

The J-7 was originally a high-altitude and high-speed fighter, and now, it has been changed to a fighter that exists specifically for air combat!

Such a simple action is more indicative of the level of performance than those dazzling fights.

Now, it is slowly flying towards it like a leisurely stroll, and at the same time, the altitude continues to decrease, and when it flies in front of everyone, the height is almost only thirty meters!

If it weren't for the first flight, then Qin Feng could still fly lower, and the height of five meters should be his limit, but now, Qin Feng couldn't fly so low, he wanted to prevent accidents, in case the plane crashed when he first flew out, it would bring a major blow to the entire model.

J-7E slowly flew in front of everyone's eyes, Qin Feng turned on the afterburner, and the fighter climbed up again, it was still so fast, and its proud climbing trajectory represented the climb of the Han Air Force equipment!

Everyone's eyes followed the trajectory of this fighter, and General Lin's eyes kept flashing, this plane, the Air Force is going to decide!

In the past, the 132 factory was self-funded, developed foreign trade projects, the Air Force felt good, and then ordered, so that there was no research and development risk, and now, this fighter is still under development, the Air Force has already matched, it can make up for the shortcomings of the Air Force in the combat that the Air Force urgently needs!