"Elder Wu, what's going on with this motive, how can it be broken when you use it?"

As soon as he came to the Motivation Research Institute, Tianming put a burned-out motive in front of Wu Lao and asked him what was wrong.

Wu Lao touched his chin, and said to Tianming without looking at it twice: "It should be burned out." ”

"I know it's burned out, but I'm asking why it's burned out?" Tianming said anxiously.

Wu Lao checked the motive nozzle, looked at Tianming and said, "What kind of fuel do you use for the motive?" It won't be hydrogen and pure oxygen, right? Didn't I tell you last time I was in the motivation test? If hydrogen and oxygen are used as fuel, the service life of this motor is only less than 5o hours, and its material cannot withstand the high temperature of more than 3ooo degrees. ”

Tianming froze: "5o hours? You didn't tell me. ”

Wu Lao spread his hands helplessly: "I said it, but you left before you finished listening." ”

"I-, okay, Wu Lao, let's go to the test bench, I'll see what the problem is."

Coming to the motor test room, Tianming took out a freshly built motor, placed it on the test bench, connected the hydrogen and oxygen tank, and the motor immediately ran out.

"There's no problem."

Looking at the blue tail flame of the steady dìng, the motivation state is very normal, Tianming really can't imagine that such a good motivation will have problems.

Wu Lao took a heat source inductor and came over, measured it on the outside of the tail flame, pointed to the number on it and said to Tianming: "Xiao Xu, look at it, 3o25 degrees, such a high temperature, the motive is made of tungsten material with the highest melting point, and it can only last for hundreds of hours." And you see, the longer the motivation runs, the higher the temperature will be. Now that the maximum temperature of the flame has reached 3o87 degrees, let's stop it. ”

The roar of motivation came to an abrupt end.

Tianming frowned and said, "Elder Wu, didn't the rocket engine of the last modification also use hydrogen and oxygen as fuel, why can the rocket engine be used, but the turbofan engine can't be used?" ”

Wu Zhengchun was no longer able to complain, and said: "Xiaoxu, a rocket engine only needs to work for a few hundred seconds, and it is only a thousand seconds long, do you compare the turbofan engine that can use thousands of hours with the rocket engine, is this meaningful?" ”

"Oh". Tianming patted his head, he was a mess, and seeing that Lan Luo next to him was laughing, he probably made a big joke again.

"Then Wu Lao, what type of material is needed to make the turbofan motor use hydrogen and oxygen fuel for more than 10,000 hours?"

Wu Zhengchun shook his head, "Generally speaking, the temperature is over 35oo degrees. Very few substances can be stored in a solid form, and the magma that erupts from the ground is at this temperature, and the temperature on the surface of the sun is 6ooo degrees. If you want to achieve what you say, use oxy-hydrogen fuel. After 10,000 hours of continuous use, the melting point of this material must not be lower than 4ooo degrees, otherwise it is impossible to do it. ”

Lan Luo next to him also asked curiously, "Old Wu, isn't he able to synthesize anything?" It should be easy to synthesize a material with a melting point of 4ooo degree and high temperature resistance, right? ”

Wu Lao shook his head again. "Any substance, once it is in a state of high temperature, the chemical bond will be in an extremely unstable state. The substance with the highest melting point at present is hafnium alloy. Its melting point is 4215 degrees, but the price of hafnium is very expensive, dozens of times that of titanium alloys, and it is not built to be used as a motive for making tsuò, and the strength and toughness of this metal are not suitable for making motives...... However, you can consider using a polymer carbon material, such as diamond, which has a melting point of 385o degrees. ”

"Oh, I see." Lan Luo stuck out his tongue in embarrassment.

"How long does it take to use diamonds as a motive?" Tianming asked.

"3oo-5oo hours, pure oxygen has a certain corrosiveness to diamond, and I don't know how long it can actually be used."

"Okay." Tianming reluctantly left the institute.

Tianming remembered the piece of silver steel ore, its melting point is 55oo degrees, and the strength is also very high, if this material is used to make hydrogen and oxygen engines, it will definitely be able to be used for more than 10,000 hours, he only needs to collect a few more pieces of silver steel ore.

As soon as he walked out of the door, Chi Tianshi rushed back, and immediately took his hand after seeing Tianming and said: "Xiaoxu, you are finally here, I just transported a few rocket motives, you can help me transform it, I have been waiting for you for the past two days." ”

"How many?" Tianming asked.

"Ten units, a long five rocket needs a total of 1o motors."

"Okay, let's go."

Tianming was a little surprised, one 3ooo, ten 3ooo, the cost of shooting a rocket was improved by him, it increased by 3ooo, it seems that the country is actually not short of money.

Chi Tianshi pointed to the rocket motives placed on the bracket and said to Tianming: "The motive you helped me improve last time, we took it for a long test run of 12oo seconds, it is very easy to use, and it has completely reached or even exceeded the design indicators, you can quickly help me improve these motives." ”

Tianming nodded, first spent half an hour to make the ability model of the rocket motive, and then in Chi Tianshi's shocked gaze, all the 1o rocket motives were improved within 3 hours, and Chi Tianshi's imagination was much faster, and he even asked uncertainly: "Xiao Xu, you have processed a motive for less than 2o minutes, is it okay to improve it like this?" These motives can be loaded into rockets and launched into the sky. ”

"No problem, you can take it to test it, as long as one is not up to standard, you take it back and I will compensate you for ten units."

As long as one rocket is not up to standard, it will fall, what is the use of 1o units?

“…… Well, I'm still sure you're good. Chi Tianshi still chose to believe.

Looking at the two large and eight small rocket motives placed on the ground, a spiritual light suddenly flashed in Tianming's head, and he asked Chi Tianshi: "Chi Lao, how is the thrust of these motives?" Is it big or not? ”

"Okay, the thrust of the F-77 hydrogen-oxygen engine is 6O tons, the thrust of the YF-1OO liquid oxygen kerosene engine is more than 12O tons, and if Y is used to shoot a 15-ton capsule, only eight YF-77s and two YF-1OO will be needed. But if you want to carry a heavy load of 25 tons, it is possible that all ten motors will have to be replaced with YF-1OO. ”

After listening, Tianming calculated in his heart for a while, the total thrust of 2oo mini motors is 28oo tons. The thrust of a YF-1OO rocket engine is 12O tons, and a rocket motor is nearly 1O turbofan engine, as long as 2O YF-1OO is used, it can push the "Lidong" forward high.

Of course, if the vent and combustion chamber are made larger, it may only take up to 8 rocket engines to propel the "Lidong" forward.

It may be a good idea to use the rocket engine as the power system of the "Lidong".

Secretary He interrupted Tianming's train of thought.

"Xiao Xu, you should still be at the base tomorrow, right? Can you help the machine design some of the parts to be processed? ”

"No problem."

Before, Tianming promised to take one day a week to help the base, and he left for exactly 6 days, and now he is back. It stands to reason that it is time to work for the base for a day.

There's no way, after going to a small space to recuperate for about 20 hours at night, replenish your mental power. The next day, Tianming produced tens of thousands of parts for the machine tool design institute at a time, and some parts were more than five or six meters in size, and these were not difficult for him, and the accuracy of the parts produced by him with the ability "mold" would not exceed 1 nanometer. In just one day, he completed all the tasks that had been backlogged for a week. Its efficiency shocked everyone.

……

During the period of Tianming's return to Earth, the "Lidong" encountered a little trouble.

A group of pirates appeared on the lone ship, and it seemed that there were no weapons on board, so it was inevitable. "Lidong" was targeted.

"Kill! Kill the men on the ship and ravage the women on the ship! Plunder the ship's property and take over the ship! ”

As soon as the pirate leader gave the order, five or six small ships less than one-tenth the size of the "Lidong" surrounded him. Using hook ropes and gang jumping tactics, they boarded the huge ship and fought with the ship's escorts.

Stab a pirate with a steel spear. Drawing a half-arc of the steel spear, the other pirate also fell down clutching his blood-spurting neck. This was the fifty-first pirate Gakka had killed, but he looked at the golden melon seed next to him with a convincing expression, because he had just shouted the number ninety-five.

"Roar! Ninety-seven! ”

The black iron sword slashed down heavily, and a pirate in front of the golden melon seed, although he made a blocking action, the weapon was still cut in two by the sharp black iron sword, and the pirate's head and body were also cut off, and a companion leaning behind him, because he was close, was also chopped off by the invincible black iron sword, and the red blood plasma and white brain pulp were sprinkled all over the golden melon seed's body, like a blood-colored god of war, under his roar, there was no way to stop.

Gakka had killed a Chosen Warrior, and when he and the Chosen One were holding each other's necks to see who could make it, he thought he was going to die, and he felt the feeling of being on the verge of death, but on the edge of endless darkness, he survived, he won, and he was no longer afraid of the proud and ruthless Chosen Ones, because he could kill them.

The golden melon seed was far stronger than he thought, and he concentrated all the attention of the pirates. Even, the pirate leader sent seven powerful warriors to deal with him at once, but none of them were his enemies, whether it was weapons or armor, under the black iron sword of the golden melon seeds, all of them became two halves, without exception.

Holding the steel spear in his hand, Gaka aimed the chasing target at the silver melon seed on his right, although the silver melon seed was relatively low-key, but only a few more people were killed than himself (the silver melon seed was not counted, Gaka still silently helped him count it), and there was hope for catching up.

I have been fighting with this pirate for a long time, and the consumption of the body is a little large, but the pirates are killing endlessly, and the ship's escort team has also suffered more than half of the casualties, and the master has not returned, and Gacha does not know if he can hold on.

"Listen, three mighty warriors, this is the last time we will persuade us to surrender! If you are willing to submit to us, you will be treated like captains, and you will be the general in command of thousands of men! But if you keep resisting, our archers will shoot you all! ”

The archers standing on the pirate ship raised their crossbows one after another, mounted their arrows, clicked, and pulled the bowstring into the shape of a full moon.

"One hundred!" The golden melon seed hacked two more pirates to death, and laughed: "My master will come back soon and kill all you stinky fish!" Go to hell all of you! Hahahaha! ”

The pirate leader's face was gloomy, his eyes were as cold as a knife, his right hand was slowly raised, and two cold words popped out of his mouth: "Release the arrow!" (To be continued......)

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