The two soon arrived at the test flight site.

Now Chunni's identity is well known, and after seeing the two, he hurriedly paid homage.

"Meet Your Highness!"

"Meet the Princess!"

Chunni has long adapted to such an identity change, and a slight smile can be regarded as a response.

Li Changfeng smiled: "Okay, let's get up." ”

Everyone got up, Li Changfeng walked towards the plane, and He Yongyan introduced in front.

"Your Highness, since the last test flight, we have redesigned it according to the questions you raised, and this time it will definitely be no problem!"

"That's good."

Li Changfeng smiled and observed the plane.

The overall appearance has not changed much from the previous aircraft, except that the wings have been widened and lengthened a little, the fuselage has also been a little longer, and other details have also changed slightly.

Like last time, Li Changfeng first checked around the plane, and after finding no problems, he boarded the plane, and Chunni wanted to go up, but he refused.

"Forget it, don't go up, if you are wrecked, although it will not hurt you, it will be very embarrassing."

Chunni didn't insist, nodded and said, "Okay, then you be careful." ”

"Don't worry, it's not the first time."

Li Changfeng smiled lightly and started the plane.

With the roar of the engines, the plane slowly accelerated and sped off on the runway.

After the speed reached the take-off requirements, Li Changfeng decisively pulled up, and the plane flew steadily.

In terms of stability, this prototype is much stronger than the last one.

Soon, the plane rose into the air.

This time, Li Changfeng did not do difficult maneuvers, did a few basic flight maneuvers, raised the speed and altitude to the limit, and landed at the test flight site after flying for a lap.

When he landed safely, there was a thunderous cheer from the test flight field.

Li Changfeng was also very happy.

After referring to the flight altitude and speed of the beautiful country in his previous life when the Japanese dropped the nuclear bomb, he found that it was basically able to meet the requirements, and he could fully meet the requirements by increasing the power in the future.

At this stage, it's very good to be able to do this.

He laughed and said, "Good job! Passing on the will of the prince, all researchers will be rewarded with 100 taels of silver! ”

Then there was another cheer.

Chunni saw that the plane could take off and land smoothly, and said with anticipation: "Changfeng, take me to fly around!" ”

Li Changfeng smiled: "Don't worry, the test hasn't been completed yet, and there will be more opportunities in the future." ”

Chunni wondered: "Why hasn't it been finished yet?" ”

"It was just a test in the no-load state, and the test in the full-load state has not yet been carried out."

The aircraft was originally designed to drop bombs.

Therefore, Li Changfeng's minimum requirement is to be able to pull a nuclear bomb, which weighs about five tons.

This test was already planned, and He Yongyan had already prepared for it, and a large number of iron pieces were transported over, weighing a total of six tons.

This number is a requirement made by Li Changfeng.

In the previous life, the nuclear bomb dropped by the beautiful country was almost five tons, and the nuclear bomb he made in this life may not be the same weight, so there must be a margin.

Soon, the iron was transported onto the plane and secured.

After refueling, Li Changfeng took another test flight.

Thundered!

As the engines roared, the plane slowly accelerated on the runway.

Li Changfeng, who was controlling the plane, felt the speed and frowned slightly.

When the aircraft is fully loaded, the acceleration time required is too long.

This indicates that the engine is not powered enough.

After a long period of acceleration, just when the plane was about to run out of the runway, it finally reached the minimum speed requirement for take-off.

After taking off, Li Changfeng's brows furrowed even tighter.

The speed of the plane was obviously a little unraveling, and even if he pressed the throttle to the end, it didn't improve much.

The power is seriously insufficient, resulting in the flight altitude not being able to be raised for a long time.

In order to climb as soon as possible, Li Changfeng increased the speed of pulling the joystick a little.

Then the plane made a head-up motion.

The next moment, the plane stalled.

Then it lost control and fell to the ground.

"Long Wind!"

Chunni was startled and hurriedly galloped away in the direction where the plane was about to fall.

He Yongyan was stunned.

"Failed! It failed again! ”

"Motivation! Or is it a lack of power, resulting in the plane not being fast enough to lose speed and crash! ”

"This means that I had a problem with my calculations before!"

“……”

In just a few breaths, the plane crashed, billowing smoke into the sky.

Fortunately, Li Changfeng was not injured at all, and he kicked open the cabin and jumped out before the plane crashed.

When he came to He Yongyan, before he could speak, He Yongyan knelt down and pleaded guilty.

"Your Highness, it's all my fault, I miscalculated the engine power, which caused this situation to happen and disappointed you!"

Li Changfeng has invested too much in aircraft research.

He Yongyan, as the person in charge of the project, knows best that he has spent more than five million taels of silver so far, which is an astronomical amount for ordinary people.

Li Changfeng did not refuse any of their requests, and he had great expectations for them.

Other researchers also knelt down and pleaded guilty.

Li Changfeng smiled dumbly, and hurriedly helped He Yongyan up, and said, "What are you doing here?" How is it possible to successfully study such an epoch-making thing in one attempt? It is inevitable to experience setbacks and failures, and to sum up experience and continue to study is that only by never giving up will you succeed! ”

He Yongyan was a little moved, and promised: "Your Highness, rest assured, I will start to improve the engine immediately, and there will definitely be no such problems next time!" ”

Li Changfeng patted him on the shoulder and said with a smile: "Well, this prince believes in you, don't put too much pressure on yourself and others, if you don't consider the load of the aircraft, in fact, this time it has been successful, this aircraft is enough to perform ordinary tasks, and it can be put into mass production." ”

According to Li Changfeng's judgment, if a four-ton weight is pulled, the plane can still ensure good maneuverability, and in addition to the task of dropping nuclear bombs, it is enough for both civilian and military use.

After all, it was the first time to study an airplane, and it was impossible for him to make excessive claims.

"Let's put aside the mass production matter for a while, I want to build an aircraft that meets your requirements first! Your Highness, rest assured, I will not disappoint you this time! ”

"Good! This prince will wait and see! By the way, do you know the direction of improvement? ”

"Know, increase the engine horsepower!"

Li Changfeng nodded, thought for a while, and was afraid that a single engine would be difficult to meet the power requirements, and then mentioned: "It's really not possible, you just add two more auxiliary engines on the left and right wings, which is much stronger than improving the power of a single engine." ”

Hearing this, He Yongyan slapped his head fiercely, and suddenly realized: "That's right! How could I not have thought of it! ”

Li Changfeng and He Yongyan discussed for a long time before leaving.

After leaving the scientific research institute, Li Changfeng instructed his subordinates: "Find the person who built this runway, and then he will take people to Zhennanguan to build a runway of the same quality." ”

(End of chapter)