The model airplane has finally come to an end, and it is time to prepare for the next air show trip.

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From the side of the hangar out of the manpower tractor led the three model airplanes to the runway, at a glance at the plane, Yang Hui directly about to kneel, this paint, what a turtle image. Now Yang Hui believes in one thing, that is, the planes of the Republic are not ugly at all, and the fundamental reason why they look ugly is the persistent pursuit of combat effectiveness.

A good Tornado fighter suddenly changed its flavor under the hands of this gang, and the yellow livery is iconic, and this livery may have been around since ancient times.

Yang Hui made up his mind that the planes used for sale would not need to be painted, and if they were used, they would be counterproductive, so it would be better to leave them to those enthusiasts to paint themselves.

Insisting on watching the model airplane being pulled onto the runway, the fuel was filled in the hangar early in the morning because it was mixed with diesel gasoline oil. A special person brought the propane tank to start the engine, and it was quickly started according to the operating procedures. The model airplane pilot sitting on the side opened the control system, checked the control system in rows, moved each control surface, tested the engine response, and felt that there was no problem.

"One is ready, request to take off"

"No. 3 is ready, request to take off"

"No. 2 is ready, request to take off"

Alienating the personnel who ran up, the tower said that there are currently no fighters in the vicinity that are being test-flown at present, and the model aircraft can be test-flighted. After receiving the message, the take-off order was immediately given.

"No. 1, No. 2, two-plane formation take-off, No. 3 is on standby."

As soon as the command came, the pilots of the first and second planes immediately adjusted the wing surface, which was originally the largest angle of the swept wing, and then lowered the trailing edge flaps, which could effectively shorten the running distance. With the strong thrust of the engine, the aircraft quickly slid forward, less than 100 meters away from the ground 10 meters apart, when the aircraft was more than 35 feet away from the ground, even if the takeoff was successful, now according to their own predetermined items are tested separately.

"Plane 3 can take off"

The No. 3 aircraft that received the order was already ready, the pilot gave the engine thrust to the maximum, and with a piercing roar, the No. 3 aircraft lifted off at a shorter distance than the first two. Then there is the large elevation angle climb, this model aircraft is limited by material problems, the thrust ratio can not reach much high, but it is still 0.7, so it can have a large angle of attack climb under the same full load.

The people on the stand can see it: "Is this big angle of attack taking off only now being tested?" ”

"That's right, the test arrangement is the last, and now it seems that this high angle of attack take-off performance is up to standard, just take off according to the design angle. Now look at the two planes that took off just now, at an altitude of 5,000 meters at 9 o'clock."

With the guidance of Chief Engineer Yu, the only few special telescopes moved over, and through the special high-powered telescopes, it was obvious that the plane was still trying to continue to climb slowly, but it was obvious that the climb was very difficult, and due to the size of the model aircraft, it was still impossible to fly too high.

The observers on the side saw the flight status of the model airplane, which was obviously considered to be at the limit altitude, and ordered to give up and continue to climb. The pilot who received the order immediately flew the model aircraft to an altitude of 3000m, which is a relatively safe distance.

"Your model airplane has already flown high enough, where will you fly so high when you play model airplanes, you can't see it with the naked eye, it's too small."

Hearing the complaint that he was flying too high and couldn't see it, Chief Master Yu said with a smile. "Okay, let's just look at the next one, and the next one can be seen with the naked eye."

Looking closely, someone suddenly exclaimed "tail spin"

Just two words to say the last test item, tail spin, only to find out how the tail spin enters, in order to draw out the forbidden area in the flight envelope of the flight manual, the model aircraft into the tail spin is more dangerous than manned aircraft, because the pilot is not a pilot, it is almost impossible to change the tail spin, so the model aircraft are forbidden to enter the tail spin.

After a few rotations, the aircraft enters the tail spin development stage, at which time the gravity of the model aircraft is balanced with its resistance, and the descent speed remains the same to reach the tail spin equilibrium point.

Now is the best time to change the tailspin, you need to be patient to pay attention to the flight altitude, the pilot listens to the altitude data reported next to it to keep the control mechanism in the normal position. Hearing that the plane had reached a predetermined altitude, the pilot immediately put the engine on the slow train. Push the rod to the end, staring at the rudder. But it still didn't work, and it didn't work to change the tailspin.

The conventional method has been used, but the model airplane still has not been able to stop the spiral, and now the height of the model airplane is too late to think of other ways again. You can only use the last trick: increase the thrust, this trick is impossible to use in the first place, using this trick will only make the situation worse, but sometimes it is possible to change it with the right angle. I didn't expect that the thrust increase was really done, and the thrust generated by the engine tended to be the head of the aircraft after the thrust was increased.

At this time, even if it is changed, it is too late to be happy. The main problem is that in order to change the tail spin just now, the last trick was used to increase the thrust, causing the nose to point to the ground. The pilot on the ground is not a pilot after all, and there is always a delay by radio remote control, and it is this delay that causes the model aircraft to fail to pull up in the end.

With a bang, huge fireworks set off in the open space next to the runway, and the entire audience was in a sensation. This is a fall?

"Old Yu, what can I do now? The last project fell into the plane, how is it finalized now? "These are Director Bai's words, and it is obvious that Director Bai is a layman this time.

Chief Engineer Yu explained with a smile, "What's the matter, Director Bai, this last project has already been successful, the last test item is to test how to enter the tail spin, find the envelope that enters the tail spin, and our flight manual will explicitly prohibit flying within this envelope." ”

At this time, the person who designed the control system also explained to Director Bai from his point of view: "The model aircraft adopts ground radio control, one is that there is a delay, and the other is that there is no way to experience it in the mirror like a pilot, saying that it is almost impossible to change the tail spin, and prohibiting this envelope is the only way." ”

I understood the reason for this, it turned out that I made a big joke, and Director Bai said curtly: "It's a joke, it's because I'm shallow, that is, this time the plane crash was deliberate?" ”

Chief Master Yu nodded in acknowledgment.

"That's right, we did it on purpose, but if we don't drop this one, we will never be able to measure the envelope, and the flight manual will not be compiled. We still did our best to this aircraft, and the pilot who operated him borrowed a genuine test pilot to do it, but this was not saved in the end, which is a pity. ”

Seeing Lao Yu talking like this, Director Bai didn't care, "What's this, this model aircraft is worth a few dollars, and if you fall, it's nothing." "That's what I said, it's called an atmosphere, and now Director Bai has no money and has begun to be capricious.

Yang Hui here witnessed the model airplane setting off fireworks, and now he is busy running towards the place where the incident occurred, and the fire extinguishing truck arranged in advance has rushed over to control the fire.

Yang Yue, who arrived at the scene earlier than Yang Hui, smiled and looked at the model aircraft that had turned into a pile of scrap iron: "Go with peace of mind, your mission has been completed, the test flight work has been completed, I will report to leave your corpse, and I will not put you into the steelmaking furnace." ”

Hearing such humorous words, the people next to him were amused. Yang Hui smiled twice and beckoned Yang Yue to leave here, the next thing is the right thing.

When the testers packed up the equipment, Director Yu announced the test results on the side of the runway.

"I announce that the flight test of the model airplane project has been successfully completed and can be finalized for production." Word by word, the last four words of 'finalized production' are spit out, marking the success of the research and development of model airplanes.

"Okay, good" There was a deafening cheer below, and the enthusiasm soared into the sky.

Hold Yang Hui's hand tightly, "It's done, I didn't hold you back." ”

"Thank you for your support, this is the result of our joint efforts"

What the two of them didn't see was the angry flame in Xiao Bo's eyes on the side, which would be the beginning of Xiao Bo's fall.

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"Okay, let's assign the drawings and find a factory to produce each part. Finally, it is assembled in the Yunma factory, where there is a spare production line that can be used for production. ”

Director Bai gave the order, and the people below began to lead the final drawings to the arranged factories. Although this thing is the same as the prototype drawings, it is still according to the rules, and the finalized drawings must be used for mass production.

With the efforts of the factories in the base, soon the parts were gathered in the Yunma factory, and the workers of the assembly line assembled according to the plan, and the installed model aircraft was no longer sent for painting, but directly sent to the test flight station for various factory test flights, and finally determined that there was no problem, and then packed, pushed into the warehouse, and prepared to pull from the railway station to the port together.