Start with a blacksmith shop.

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

As for the engine's muffler, it still uses the original factory muffler that came with the motorcycle.

They tried different noise reduction systems themselves, but none were as thorough as the original factory system.

This also confirms, from another perspective, that the silencer Li Zhenhua created is indeed impressive.

The noise generated by the rotating propeller masks the sound of the engine.

Lieutenant Wang closed the small window again, watching the propeller spinning at a steady pace.

The noise from the propellers is also isolated from the aircraft cabin.

Only then did he give the ground crew a thumbs-up, which the ground crew acknowledged.

On the temporary control tower, Grandpa Yan, as the chief designer, also issued the order for the test flight.

Lieutenant Wang, who received the takeoff order via headset, didn't hesitate.

Controlling the plane on the runway, I slowly began to accelerate.

Once the aircraft reaches a certain speed, the two engines drive the propellers to spin wildly.

The thrust generated by the propeller propels the entire aircraft forward.

The aircraft's nose landing gear also lifted off the ground bit by bit under this thrust.

Lieutenant Wang sensed the aircraft's condition and knew it was time to pull up.

With his right hand, he reached for the throttle valve handle on the dashboard and pushed it all the way to the maximum throttle.

Seize the opportunity, firmly grasp the V-shaped control lever with both hands, and lift it upwards with slight force.

At full throttle, the nose of the aircraft lifted off the ground.

This was because it was Lieutenant Wang's first time driving, and he wasn't familiar with the process.

The movement of lifting the control stick was a bit too large, almost causing the tail of the plane, which was still not off the ground, to scrape against the runway.

It was only thanks to Lieutenant Wang's experience that he promptly corrected the aircraft's attitude and loosened the control stick, thus preventing an accident.

The plane was lifted off the ground, creating space where Lieutenant Wang could do as he pleased.

The full throttle was not released; instead, the control lever was pulled up forcefully.

The plane followed Lieutenant Wang's piloting, performing corresponding maneuvers.

At this moment, the plane was climbing at a steep 40-degree angle to the ground, ascending into the blue sky.

When the plane climbed to 2,000 meters and was about to stall, Lieutenant Wang switched the plane to level flight.

After correcting the situation, my right hand was freed up, and I was able to remove the throttle valve from the full throttle position.

The aircraft maintained a speed of approximately 240 kilometers per hour and flew at an altitude of 2,000 meters for several minutes.

"Tower, tower, requesting an ascent to 3,000 meters to continue testing."

Lieutenant Wang seemed completely unaffected, flying freely in the sky.

But on the ground, it was a completely different story. Everyone on the ground was terrified by what they had just witnessed taking off.

"Old Zhou, look, didn't you forget to mention something?"

Grandpa Yan turned to Grandpa Zhou, who was holding binoculars and following the plane's movements, and asked him a question.

"Huh? What did you say?"

"I think Wang kid is treating our little toy like a fighter jet."

Didn't you tell him that this is a commercial airliner, not a fighter jet?

Upon hearing Old Master Yan's question, Old Master Zhou suddenly slapped his forehead before speaking.

"Oh dear, I completely forgot. It's my fault, I've never worked on civilian products before."

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

Several staff members nearby listened to the conversation between the two and smiled, as if they had known it would happen.

"Alright, Lao Zhou, I know you too well."

In response to Old Master Yan's words, the old man surnamed Zhou immediately said something.

"It's alright, Yan Tou. Think about the propeller planes from World War I and World War II."

"Aren't the specs on ours better than back then? Performance-wise, it's fine! Don't worry."

What he said was indeed correct, and everyone once again focused their attention on the plane in the sky.

The plane climbed to an altitude of 3,000 meters and then leveled off again.

Lieutenant Wang was also at this altitude, working with the ground control tower to conduct various tests on the aircraft.

After a series of tests, all of the aircraft's performance indicators were within expectations.

Based on Lieutenant Wang's current piloting experience, he is satisfied with the aircraft's handling, flight control, and avionics.

But I just felt a little unsatisfied; I always felt like the motivation wasn't quite enough.

As far as the aircraft type is concerned, if the engine were more powerful, it could fly the plane even better.

With this feeling in mind, I pressed the communication button to contact the ground.

"Calling the control tower, the bird is calling the control tower!"

"Tower received. Is there a problem?"

"The bird has requested the engine restrictions be lifted, and the maximum altitude test will proceed! Please grant the request from control tower."

At the temporary control tower on the ground, all the old men around looked at Grandpa Yan.

Old Man Yan nodded solemnly, walked to the communicator, held the microphone in his left hand, and put the earpiece on his ear with his right.

"Lieutenant Wang, this is Yan Hang. I grant you permission to lift the engine restrictions."

During maximum altitude testing, please remember one thing: don't take risks; safety should be the top priority.

If the situation is hopeless, jump immediately. Don't gamble with your life.

Lieutenant Wang was piloting the plane, circling over the Hongdu Aircraft Factory.

Hearing Grandpa Yan's instructions, he nodded subconsciously, and only after realizing what he meant did he answer into the communicator.

"Bird received, bird received, safety is the priority."

Lieutenant Wang released the intercom button, freeing his right hand to reach towards the dashboard.

On the dashboard, a switch with a cover is particularly eye-catching. Opening the cover...

The switch is now visible; turn it to the on position.

The instant the switch was turned on, Lieutenant Wang immediately felt as if the plane he was sitting in was like a wild horse that had been unleashed.

The engine horsepower increased significantly, pushing the throttle valve forward to its maximum, and a feeling of being pushed back into the seat came through.

The plane's speed increased significantly, and he pulled up the control stick.

The plane was also maneuvering, its nose once again at a 40-degree angle to the ground, and it flew into the sky.

The flight altitude was increasing, the propellers were spinning wildly, and the two engines were working at full speed.

The plane quickly climbed to 4,000 meters, but this was not the final point; the altitude was still increasing.

4500 meter

5000 meter

5100 meter

5200 meters...

When the altitude reached 5600 meters, Lieutenant Wang could clearly feel the engine straining.

When the plane climbed to 5780 meters, Lieutenant Wang finally changed its attitude and brought it into level flight.

He knew that the engine had reached its limit, and continuing would be completely unnecessary.

If problems arise at that time, it will not only endanger his safety, but also cause unnecessary losses.

With its current power, this aircraft can ascend to an altitude of nearly six thousand meters.

It was already a remarkable achievement, although Lieutenant Wang still felt a lack of motivation.

"Control tower! Control tower! The bird has now reached an airspace of 5780 meters."

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

Lieutenant Wang's report from the temporary control tower on the ground was broadcast to everyone present through loudspeakers.