Of course, no one heard Lieutenant Wang's exclamation, and even if he did, no one would refute him.

If you want to say that the silence of this engine is still the original factory silencer on the original motorcycle,

They have tried the sound attenuation system themselves, but it is not as thorough as the original factory.

This also confirms from the other side that the muffler that Li Zhenhua made is indeed awesome.

The noise generated by the rotation of the propeller muffles out the sound of the engine.

Lieutenant Wang closed the small window again, looking at the propeller rotating at a constant speed,

The noise of the propellers is also isolated outside the aircraft cabin.

After that, he gave a thumbs up to the ground crew, and the ground crew received it.

On the side of the temporary tower, Mr. Yan, as the chief engineer, also gave the order for a test flight.

Through the headset, Lieutenant Wang, who got the take-off order, was not ambiguous,

controlled the plane on the runway, and slowly began to accelerate,

When the plane reaches a certain speed, the two engines drive the propeller to rotate wildly.

The thrust generated by the propeller pushes the entire aircraft forward,

The nose landing gear of the plane also left the ground under the action of this thrust.

Lieutenant Wang sensed the state of the plane and knew that it was time to pull up.

The right hand touches the throttle handle on the instrument panel and pushes the handle to the front and the maximum throttle.

Grasp the opportunity, grasp the V-shaped operating lever in your hand tightly with both hands, and lift it up slightly forcefully.

Under full throttle, the nose of the aircraft leaves the ground,

In the middle, due to the fact that Lieutenant Wang was driving for the first time, he was not familiar with it.

The action of lifting the operating stick was a little bigger, almost rubbing the tail and runway that had not yet left the ground.

That is, Lieutenant Wang has rich experience, and he corrected the attitude of the plane in time and loosened the operating lever, so that there was no accident.

The plane was completely detached from the ground, there was space, and Lieutenant Wang had a place to do whatever he wanted.

Just now, the full throttle state was not lifted, but the lever was pulled up hard.

The plane also followed the piloting of Lieutenant Wang, making corresponding movements.

At this moment, I saw that the plane and the ground were climbing at a large angle of 40 degrees, climbing towards the blue sky.

When the plane climbed to 2,000 meters and was about to enter a stall state, Lieutenant Wang changed the plane to level flight.

After the change, the right hand was also freed, and the throttle valve was withdrawn from the full throttle state.

The plane was kept at a speed of 240 kilometers per hour, and it flew at an altitude of two thousand meters for several minutes.

"Tower, tower, request to climb to three thousand meters to continue testing."

Lieutenant Wang was flying freely in the sky as if he was nothing.

But on the ground, it was a completely different mentality, and the people on the ground were all scared into a cold sweat by the scene that had just taken off.

"Lao Zhou, look at it, did you have a sentence that you didn't tell me just now!"

Old Man Yan turned his head to ask Old Man Zhou, who was holding a telescope next to him and shaking his head with the plane.

"Ah, what did you say?"

"I said I think Wang Boy is using our little toy as a fighter jet.

Didn't you tell him that this is a civil aircraft, not a fighter jet! ”

Hearing Old Man Yan's question, Old Man Zhou slapped his head sharply at this time, and then said.

"Oops, I really forgot, it's also my fault, I haven't done civilian things before,

I thought it was flying a fighter jet, so I didn't notice it, and I didn't give instructions in place. ”

Several staff members around listened to the conversation between the two, and they were also smiling, with a really like that.

"Okay, Lao Zhou, I don't know you yet?"

Facing Old Man Yan's words, the old man surnamed Zhou immediately said.

"It's okay to be strict, you think about the propeller planes of World War I and World War II,

Aren't the parameters of our thing better than they were back then? It's okay in terms of performance! Feel relieved. ”

There was indeed nothing wrong with what he said, and everyone once again focused their eyes on the plane in the sky.

The plane climbed to an altitude of 3,000 meters and changed to level flight again.

Lieutenant Wang is also at this altitude, cooperating with the ground tower, doing various index tests of the aircraft.

After a series of tests, all the indicators of the aircraft are within the expected range.

As far as Lieutenant Wang's current piloting experience is concerned, this aircraft can satisfy him in terms of control, flight control, avionics, etc.

But I just feel a little unhappy, and I always feel that this motivation is not so sufficient.

As far as the model is concerned, as long as the engine is more powerful, he can fly the plane better.

With this feeling in mind, he pressed the communication button with the ground.

"Call the tower, the bird calls the tower!"

"The tower received, is there any problem?"

"Birdie has applied to lift the engine restrictions, and the next step will be to conduct a maximum ceiling test! Please agree to the tower. ”

On the temporary tower on the ground, several old men around all looked at Old Man Yan.

Old man Yan nodded with a serious face, walked to the side of the intercom, held the microphone in his left hand, and buckled the earphone to his ear with his right hand.

"Lieutenant Wang, I'm Yan Hang, I allow you to lift the engine restrictions,

In the maximum ceiling test, please remember one thing, don't take risks, everything is about safety,

Don't jump right away, and don't joke with your own safety. ”

Lieutenant Wang drove the plane and circled over the Hongdu Aircraft Factory.

Hearing Old Man Yan's instructions, he nodded subconsciously, and only replied to the intercom after reacting.

"The bird receives, the bird receives, everything is based on safety."

Lieutenant Wang released the intercom button and stretched out his free right hand to the instrument panel.

A switch with a lid on the dashboard is particularly eye-catching, opening the cover,

The switch is exposed, and the switch is pulled to the open position.

At the moment when the switch was turned on, Lieutenant Wang immediately felt that the plane he sat down on was like a fierce horse untying the reins.

The engine horsepower increased dramatically, pushing the throttle valve forward to the head, and a feeling of pushing back came.

The speed of the plane increased by a large margin, and the lever was pulled up by him.

The plane was also making movements, and the nose of the plane was again at a forty-degree angle to the ground, flying towards the sky.

The flight altitude is increasing, the propellers are spinning wildly, and the two engines are working desperately.

Soon the plane climbed to 4,000 meters, but this was not the final point, and the altitude was still rising.

4500 meters

5000 meters

5100 meters

5200 m ......

When the altitude reached 5,600 meters, Lieutenant Wang could clearly feel the strain of the engine.

When it climbed to 5,780 meters, Lieutenant Wang finally changed the attitude of the plane and turned it into level flight.

He knew that the engine had reached its limit at this time, and it was completely unnecessary to continue.

At that time, if there is a problem, it will not only endanger his safety, but also cause unnecessary losses.

As far as this aircraft is concerned, with its current power, it can rise to an altitude of nearly six thousand meters.

It's already a remarkable achievement, although Lieutenant Wang still feels undermotivated.

"Tower! Control tower! The bird has now reached the airspace of 5780 meters,

The flight attitude has been adjusted to level flight, and the current flight status is normal. ”

On the temporary tower on the ground, Lieutenant Wang's report reached the ears of everyone present through the loudspeaker.