Chapter 77: Gliding Test (55 for Alliance Leader Flankerr)

Chang Haonan's plane was still booked for the next morning.

Or that Tu-154M.

It's just that this time he is alone, and his luggage has an extra computer bag than last time.

And almost at the same time as he was preparing to leave school.

On the apron of Beiling Airport on the outskirts of Shengjing City, personnel from the 601 test flight station and the Air Force maintenance team were surrounding the No. 04 prototype that had just been towed out of the final assembly plant, checking the technical status of the aircraft.

Test pilot Fu Guoxiang sat in the cabin and made final preparations before the flight.

After the No. 03 aircraft was downgraded to a non-full-state prototype and sent to Yanliang, the 112 factory and the 601 institute set up a "youth commando" to prepare for the upgrading of the No. 04 machine in three shifts.

In the end, after getting Chang Haonan's calculation results, it only took a week to complete the production and replacement of the new wing.

Of course, although the parts of the No. 04 aircraft have not changed much except for the wings, after all, it was returned to the factory for a major operation, so according to Yang Fenghata's requirements, all the pre-flight inspection work must be completed with reference to the standards of the new model.

In other words, the "second maiden flight" of the No. 04 aircraft is about to take place.

However, according to Yang Fenghat's arrangement, this morning, the plane will not really take off, but will first conduct three rounds of ground taxiing tests.

This is also the treatment of a completely new type of aircraft.

This plane deserves his care.

The more important reason is that Yang Fengfa received a call from Du Yishan yesterday, saying that Chang Haonan had decided to return to Shengjing today.

After much thought, he finally decided to put the official test flight in the afternoon.

After all, Chang Haonan is the proposer and the most important executor of this improvement plan, so it is also appropriate for him to be a witness.

In fact, at the beginning, Yang Fenghat's estimate was that the modification of the No. 04 prototype would take about two weeks, so he had only given half a month off with a stroke of his pen, thinking that he would be able to catch up with the test flight when Chang Haonan returned.

It's just that the efficiency of the youth commandos is beyond his imagination.

And it is extremely coincidental that Chang Haonan chose to return to the 601 Institute early after only resting for a week without knowing these circumstances at all.

"Maybe this is the bond of fate?" Yang Fenghata looked at the yellow-skinned prototype No. 04 not far away and thought to himself.

At this time, Liu Ming, the deputy chief designer, came from a distance and interrupted his thoughts.

"Mr. Yang, all the preparations before the slide have been completed, everything is going well, do you want to start the test?"

Yang Bonghata habitually raised his wrist and glanced at the time.

Although he knew that there was actually an order of magnitude more accurate time than his mechanical watch at the test station, this habit had been maintained for many years.

"Let's get started, let's go to the tower."

With Yang Fenghata's order, the testers and equipment that had just gathered around the No. 04 prototype began to evacuate, leaving only the power and air source vehicles needed to start the engine.

Fu Guoxiang, who was in the cockpit, heard the command from the radio at the same time, he closed the hatch, moved his neck slightly, then put on an oxygen mask, and with the help of an external power supply, started the two engines, pushed the throttle valve and stabilized the speed at 20%.

It is not the first time that Fu Guoxiang has piloted the J-8-3, and even the last first flight of the No. 04 prototype was completed by him, so all this is familiar to him.

According to the flight test process, the first part of the taxiing and taxiing experiments is to test the stability and maneuverability of the aircraft's ground motion at speeds of 20 and 55 km/h respectively, corresponding to the regional taxiing and turning under normal conditions and taxiing under crowded tarmac conditions.

The second session is to test the aircraft's deviation correction ability at moderate speeds at speeds of 80 and 160 km/h.

Fu Guoxiang, who is familiar with the road, completed all the subjects in these two tests in only a short time, and everything went smoothly.

This is followed by the third part, the high-speed taxi, which tests the performance of the aircraft's rudder surfaces and the balance of the aircraft when the front wheels are lifted at a speed of 240-320 km/h, close to take-off.

Supposedly, if this is really a brand new model, then the test of these three links will not be completed in one day.

However, the reference to the new model is not a new model after all, and many common small problems of the new machine do not exist on this prototype.

Careful inspection before the test flight is to be foolproof, and once you enter the test flight process, it is necessary to take into account the issue of efficiency.

At the end of the runway, Fu Guoxiang finally pushed the engine to 50% and released the brakes.

The numbers displayed below the speedometer keep getting louder and louder in the roar of the engine.

Before this test flight, he had already been told that the improved take-off and landing performance of the aircraft would be better, so Fu Guoxiang was very careful to control the attitude and speed of the aircraft.

But the reality was far beyond his expectations.

At a distance of nearly 700 meters, it was already clear that the plane had a very obvious tendency to leave the ground.

Then Fu Guoxiang gently pulled the joystick and prepared to carry out the wheel lifting test.

Suddenly, he felt a very brief cycle of overweight-weightlessness.

Obviously, at that moment, his entire plane should have left the runway for a moment, and then it was pressed back by the lever that he used like muscle memory.

Fortunately, his test flight experience and skills are very good, and he did not make the first flight in advance.

The main reason is that the sensors required for the taxiing test are not the same as the flight test, and now even if you fly up, you can't get the complete data.

"The take-off distance of this plane is about 100 meters shorter than before."

Fu Guoxiang quickly made a judgment and reported the situation to the tower.

At the same time, Yang Fenghat, who had been waiting here since just now, also put down the telescope in his hand at the same time.

Previous wind tunnel tests have shown that the take-off speed of the aircraft without combat load can be reduced by about 12% from nearly 400 km/h to about 350 km/h, and the take-off distance will be reduced accordingly, all other parts remain unchanged and only the new wings are replaced.

Although it is still not comparable to the third-generation aircraft, in terms of the design of an interceptor, the 12% increase is quite exaggerated.

After all, such a change was made without affecting the aircraft's high-altitude and high-speed performance at all.

Many comrades did not even dare to believe this result, so they slightly lowered their psychological expectations at the discussion meeting before the first flight.

However, according to what the pilots have just reported, the actual performance improvement of the aircraft is even better than the wind tunnel test results!

Yang Bonghata smacked his lips and looked out the window at the prototype 04, which had finished testing and was taxiing towards the tarmac.

If you only talk about the take-off speed itself, it is actually not the core performance of an aircraft.

But it is able to reflect the level of lift of the wings from the side and, importantly, low-speed maneuverability for fighters.

He couldn't wait to see the data from the official test flight in the afternoon.

Tomorrow add three chapters of the three helmsmen, if you ask the editor tomorrow to order the first order of 2500, then the day after tomorrow will continue to be ten thousand

(End of chapter)