Even if he is not very expert, Long Yun can see that the state of these two fighters is quite good.

Now being tested is the wing assembly of a J-7IIM. It looks quite outdated in the configuration, but it has a complete body detection sensing line; Thanks to the sensors arranged in different positions, Long Yun can easily see the strength of the entire wing member on the screen.

After observing the display of the wing, the pilot nodded with satisfaction: "Well, it's not bad, although there are some strength flaws, but it's still okay." The tank seal is no problem either. He pointed to a section that was beating and told Long Yun that the dynamic pressure test of the fuel tank was going on here, and if there was a sharp fluctuation, it would mean that there would be a problem in the future.

"Oh, and by the way, these old planes all have a little bit of a slight oil leak, which isn't a big deal."

Soviet fighter planes have flown many times in the parallel world, and Long Yun is used to this situation, and he nodded knowingly.

After inspecting the two wings, the pilots proceeded to connect the wiring to the fuselage for the next step of detailed inspection.

Climbing up the boarding ladder, Long Yun looked at the instrument layout in the cockpit with a little curiosity. For the sake of fairness in the competition, the federation stipulates that in addition to the safety monitors that must be installed, the instrument system and cockpit layout of the fighter shall not be arbitrarily changed.

However, the ejection seat is quite new, and the purchase price of this set of ejection equipment alone is about 2 million yuan, which is also a necessary equipment for IFU certification. This thing is used to save your life in case of an emergency, but you can't be sloppy at all.

In contrast, the situation with the engine is not so ideal; It's not that there is any fault, but the WP-7C turbojet engine that comes standard with the J-7IIM is too old. At that time, when the contract was signed, the "Starlight" people also said: If it were not transferred with the airworthiness certificate, I am afraid that the current polluting and inefficient engine would not even be able to obtain a flight permit.

While testing, while familiarizing themselves with the body according to the drawings and instructions, several people were busy until night, and it was considered to be completed.

After a busy day, all parts were tested, and after confirming that there were no problems, the ground running test was carried out.

Early the next morning, Long Yun, who came to the training center, walked into the hangar through the side door. Seeing that the lights in the hangar were turned on quite brightly, Long Yun knew that Liu Wei had come earlier than him, and he was already busy with the pilot and others.

The wide hangar door was opened, and under the reflection of the morning sun, the two silver-white J-7IIMs that had been refreshed were quietly parked in the center of the hangar, as if they were also looking forward to attacking again after a long period of leisure.

Compared with the tall and spacious hangar that can accommodate heavy fighters, the J-7 looks quite light with a total length of only 14 meters and a wingspan of just over 7 meters.

Seeing that the ground crew pilot was closing the detection lines and pipelines on the ground with his assistant at this time, Long Yun didn't want to disturb their work, so he came to the corner of the hangar to check the backup engines shipped in the same batch.

Unlike the engines in the installed state, the two WP-7Cs placed on the pulley carriage are apparently in factory condition, with fine oil seals at the connections of pipes and components, and the front and rear covers and some fasteners have not been moved, and it seems that they have never been tested, let alone used.

For the WP-7 series engines, Long Yun does not know much. He only knows that this kind of product copied from the Soviet P11-F-300 engine by the Chinese aviation industry in the early days is indeed not technologically advanced, and it can even be said that it is completely outdated today. Of course, for a light fighter like the J-7, the afterburner thrust of more than six tons of WP-7C is enough; The newer WP-13 has more thrust and fuel efficiency, but the price of a single unit of 4.7 million yuan is about the same as the price of the second-hand aircraft in front of him, and Long Yun really has no way to replace it now.

"Captain Dragon!"

Hearing the greeting from behind, Long Yun was not particularly used to it, so he turned around and said hello to the pilot who raised his hand to greet him.

"Test drive in the morning, how much fuel should we refuel?"

"How much?"

Long Yun really hadn't thought about it, couldn't he just fill it up? Looking at the idle oil pumps and pipeline equipment in the corner of the side, he suddenly remembered: the fuel in the aviation center is stored and supplied in a centralized manner, and the team is not allowed to refill and unload the fuel of the fighters by themselves.

This rule is quite necessary. Since it is not a real battle, but a competition, safety should always be the most important element. Since the missiles used in aviation competitions are all models specially used for competitions, and there are no warheads on them at all, the biggest hidden danger for aviation bases is fuel.

In the early days of aviation competition, there were no rules to follow, there were accidents because of the non-standard refueling process, and now the aviation center is refueling on the spot, and the empty fuel storage is towed back to the hangar after the flight. What can be filled by the team itself is now compressed oxygen, nitrogen, and oil.

"Well, I'll add 100 liters later. Add it when you go back and make your first flight. ”

It's still more worry-free. How much oil do you use for a test drive? If you can't use it, you have to pull it out and add it next time, how troublesome it is.

When he came to the testing equipment, Long Yun learned the operation of the pilot and assistant, chatting or taking a hand from time to time. At the time of the crossing, he himself was a frequent visitor to the military airfield, but compared with the busy scene of the past, where machinery, ordnance, instruments, radios, field personnel, and equipment were in a mess, the ground crew of the current fighter can be said to be extremely advanced and simplified.

Take the J-7IIM in front of you as an example, you only need to open the cover plate of the engine test end before sorting, connect the pipeline to start the test process, and then automatically conduct a complete state analysis, and then the electric start idling to detect the reading; Then there is the response detection of the entire fly-by-wire control system, including the control surface and landing gear and other moving parts.

Finally, check the status of the ejection seat, load resistance and life support system, and you're done. After all, this is not a war, and systems such as radar fire control do not need to be looked at at at all, and if they break down, it will not affect flight safety.

"It's all ready, shall we come out for a test flight?"

"Well, the weather is good today, which is suitable for outdoor activities. Everyone has worked hard, so let's take a break. ”

Because the fighter plane was not yet powered at this time, the group used a tractor to tow the fighter to the ground test area marked with a marking.

In today's test area, in addition to Long Yun's two J-7II, there is also a Su-35 of the "Spark" club, and the green, yellow, and brown camouflage paint looks quite imposing, and it seems that there are quite a lot of teams that have recently purchased this kind of heavy fighter.

"Hey, are you guys here to test the car too?" Seeing Long Yun and them slowly coming to the parking area, the people of the "Spark" team greeted them.

"Yes! This was just bought by the team? Is it really a good plane, Su-35? ”

"You also thought it was the Su-35, right? Actually, it's pretty much the same. Manufactured by Shen Fei, it is called J-15 in China. In fact, they are all the same model, and our team will change it as the main force now. ”

Standing enviously on the side, Long Yun and the others watched the J-15, which gradually increased its thrust, start easily and gradually move away on the runway. The heat wave caused by the powerful WS-10C engine has not dissipated in the starting area for a long time, and Long Yun can't help but imagine when he can have such a powerful fighter.

By the time the figure of the J-15 has disappeared into the clear blue sky, the huge refueling truck has already refueled their J-7, a total of 200 liters of refueling is completely drizzle for this kind of heavy fuel vehicle using SX2300 8*8 chassis, and the huge capacity can even fill the fuel tanks of two J-11 at a time.

When the tanker truck drove out of the test area, Long Yun climbed into the cockpit to prepare for the ground test car.

In this world, this is the first time he has really carried out the action control of a fighter aircraft, and of course he can guarantee it technically, but he still can't suppress his excitement. After opening the main power gate and briefly checking the instrument display, Long Yun pressed the start button and used the ground power supply to start the main engine of the fighter.

As the sound of the engine running smoothly and gradually increased, the automatic start program began to operate, and Long Yun could feel a slight shock of the body when the ignition indicator light was on.

Almost simultaneously with the ignition, the oil supply system was already in operation, the engine rotor began to accelerate substantially and provide the compressor with the power to speed up; With the increase of engine speed, the roaring sound is getting higher and higher, after crossing the N2 prompt line of the instrument panel, the system automatically disconnects the ground power supply and increases the fuel supply, before and after about a minute, the WP-7C finally started successfully and stabilized in the slow state.

At this time, the speed of the compressor is about 5,300 revolutions per minute, which is a bit low compared to the theoretical parameters, but it is quite normal.

After confirming that there was no problem with the engine start, Long Yun first checked the braking status, then increased the throttle to further increase the thrust, and began to accelerate and slide on the spacious runway. The sound of the engine running smoothly continues to increase until it reaches its maximum power; The thin flames spewed out from the tail of the fighter were uniform and bright, and Liu Wei and the others on the side saw it, and now they could completely confirm that the engine of the fighter was working normally.

Hearing the pilot's response in the headset, Long Yun gradually pushed back the throttle valve, preparing to shut down naturally after entering the slow train smoothly; At this time, the fighter's fuel stock was almost exhausted, and the flashing fuel warning light had already turned into a constant state.

The WP-7C engine is better to say, but the fuel consumption is indeed too high: when the afterburner is not turned on, one kilogram of thrust output for every hour of thrust needs the same weight of one kilogram of fuel, and the appetite is almost the same as that of the WS-10C, which has a thrust of nearly thirteen tons. The fuel consumption is basically doubled, and the J-7II only has a small body with more than two tons of fuel, and the oil can be burned in less than ten minutes.

Hey, it seems that you will have to pay a lot of money for gas in the future, Long Yun thought to himself.