Everyone stared intently at the runway ahead. Especially Li Zhen, he clenched his fists unconsciously.

When about a kilometer was reached, one of the auxiliary steam cars broke its rope.

After the inertia rises, a steam car will drag it with force, the speed will be faster, and the force will be more concentrated.

On the plane, Liu Jinghong nervously grasped the steering stick that controlled the wings of the plane, staring intently ahead.

"Take off."

"Why haven't you taken off yet?"

“……”

The speed is already over forty per hour.

Halfway through the journey, Liu Jinghong knew that he couldn't go on like this. The limit speed of the steam car is only sixty or seventy, and dragging oneself to forty is probably the limit of the limit.

Gritting his teeth, Liu Jinghong pushed the lever up.

At the same time, the wings of the aircraft were connected by the transmission rods, which were a little upturned.

With such a pry, the flowing air immediately began to turn into lift, providing upward momentum to the aircraft.

And with such a prie, the steam car in front of it suddenly stopped.

The students who were driving the car watched the speed of the car drop so abruptly, and this feeling was the feeling of huge wind resistance coming from behind.

Inadvertently looked back, but the students of the Aviation Academy found that the front wheels of the plane behind them were lifted up a little, some floating, some frivolous.

Is it going to be successful?

Everyone held their breath.

The students of the Aviation Academy even drove the horsepower to the maximum, constantly adding fire to the steam car. Continuously increase the output of the valve. But the steam car has reached its limit, and the fastest is so fast.

Liu Jinghong sat on the plane, staring at the landing wheel below with a pair of eyes.

"Fly."

"Fly."

"Fly, please!"

He sat in the plane, and his whole person was constantly rising and falling. I can clearly feel that the plane keeps looking up, and then it keeps jolting and falling, and it keeps looking up, and it keeps falling again.

No, it's still not fast enough. The motivation is still not strong enough.

"Forty-five kilometers!"

In the steam car ahead, the driver suddenly pulled his neck and shouted.

When Liu Jinghong heard this, a look of defeat immediately flashed in his eyes.

If there is still no sign of take-off at a ground speed of 45 mph, then there will be a lot of bumps in the road.

The distance of five kilometers is not long enough. Liu Jinghong's monoplane was maximized, but the front wheels were raised by about ten centimeters. Never completely off the ground.

After turning back, Liu Jinghong couldn't help but regret in frustration: "It's just a little bit." If it goes up to 60 km/h, I'm sure it will be able to take off. ”

Li Zhen smiled and shook his head: "Sixty? No, I think it takes at least a hundred kilometers for it to be able to fly safely, securely and steadily. ”

Liu Jinghong frowned: "Why?" ”

Li Zhen said: "Taking off is just the first step. The most important thing is to move steadily in the air, as it is very dangerous if the speed is less than 100. I'm worried that it could crash at any moment. ”

Liu Jinghong sighed, this is the truth. He couldn't figure it out.

But can the star engine, which is still under development, be able to do this?

Can a star engine provide thrust at a speed of more than 100 kilometers per hour for an aircraft of several hundred kilograms?

Hard.

In this conversion, the star engine must provide more than one ton of thrust.

With such a terrifying thrust, even Li Zhen didn't have confidence. If it can be achieved within ten years, it can be regarded as burning high incense.

Li Zhen sat on the lawn and rested for a while, and said, "Now we can only see how the wings are first." ”

As he spoke, the biplane was ready over there.

It's still the same pattern. Two steam wagons came to pull the plant, and a rope was broken in the middle.

Like Liu Jinghong, Xu Xiufeng also had to conduct the experiment himself this time.

Li Zhen frowned and said, "Vice President Xu, you are old. It's different from Jinghong, so leave the test to someone else. As you saw just now, there are bumps. And there is still a certain risk factor for this. ”

Xu Xiufeng said indifferently: "I designed the biplane model myself, and I have to test it myself." ”

No one could twist Xu Xiufeng, so they could only default to Xu Xiufeng boarding the biplane and fastening the safety rope.

After the failure of the monoplane, the crowd of onlookers was already a little excited at this time.

"It's boring, it's not interesting."

"I thought I could really fly, but my feelings just dragged on for a while."

"What's the point of that? Nothing at all. ”

"I can't even fly a kite, so what's the point."

"Then you go."

"But I want to see what those two-layer wings look like."

"The two-layer wings should be easy to fly, right?"

"It doesn't make much sense even if you fly. Don't need a steam cart to drag it away? And...... It also has to be straight and able to drive quickly. Where are there so many eligible road conditions in New Kyushu, isn't it a delay. ”

"There's no road to build."

"Crazy. Just to let them drag and run like this, they build this kind of road everywhere? ”

“……”

'Woo woo'

While everyone was chatting, the steam car started, and the two steam cars dragged the double-decker plane out slowly.

Gradually, the speed is getting faster and faster.

Li Zhen and the others stood in the rear, staring closely at the slowly departing plane in front of them, their brows furrowed.

I don't know if it will work out this time.

If it still doesn't succeed this time, it will once again encounter an unprecedented bottleneck.

The airframe needs to be re-planned to reduce the weight by at least half. Then it was time to exploit the potential of the star engine again and push out the maximum speed and torque.

But in fact, no matter which one it is, it is extremely difficult.

At present, these two models are made after overturning the original manuscript many times and designing many times. The weight is already light. If you want to lose weight significantly, then it is not a little difficult.

And the potential of the star engine is squeezed, which is even more difficult. Now that the star engine has not been thoroughly developed, how can it be upgraded?

Matters. Everyone held their breath.

'Woo woo'

The speed of the steam car is getting faster and faster.

Double-decker aircraft are also getting faster.

Xu Xiufeng's face was full of relaxation, because Liu Jinghong only started to raise his head when he was two kilometers away just now. He's not in a hurry.

"That's not right!"

Xu Xiufeng exclaimed in surprise and suddenly looked down.

I saw that the front wheel had been raised.

"No, I haven't operated the lever yet."

Xu Xiufeng exclaimed, and looked at the distance again, it was only one kilometer away.

The speed of the car is only more than 30 kilometers.

"Forty!"

A rope broke in the steam car ahead, and the driver of the car left alone shouted.

Xu Xiufeng took a deep breath, then held his breath again, and slowly pushed the operating lever up......