In fact, the reason why Galaxy Technology wants to develop a high-thrust rocket engine is not for spacecraft.

The projection spacecraft of the mass projector does not need a high-thrust rocket engine, because the projection spacecraft can directly enter the low-earth orbit of more than 150 kilometers by virtue of the mass projection system.

In this way, the hydrogen-oxygen engine with high specific impulse is more suitable for projecting spacecraft.

Boom...... Hiss......

[Specific impulse: 471 seconds]

Looking at the numbers on the instrument, Huang Haojie is more satisfied, he can do 471 seconds on the ground, which means that the vacuum specific impulse may be about 500 seconds.

The thrust of the same 547 tons is not small.

As we all know, as a space powerhouse, the F-1 rocket engine manufactured by their Rockdyne company (5 F1s were used on Saturn V) has an average sea-level thrust of about 691 tons, which is the world's largest single-combustion chamber liquid rocket engine.

However, as a liquid rocket engine, the F-1 rocket engine is slightly inferior to the RD-170 engine of the Woolly Bear.

Moreover, in the process of launching the Atlas-5 launch vehicle, Mi Lijia still needs to use the RD-180 engine of Mao Bear to provide power output.

From this point of view, Mao Xiong's rocket engine technology is indeed leading.

The RD-180 engine is actually a model of the RD-170 series engine, and the RD-170 series engine is designed in several versions, with a thrust range of 190 tons to 1000 tons.

The RD-180 engine has a vacuum thrust of 423.4 tons, and the diameter of this class engine is about 3.15 meters, the length is 3.56 meters, and the weight is more than 5.0 tons.

Pratt & Whitney and the Power Machinery Research and Production Consortium cooperated to develop the RD-180 engine, but the production of the RD-180 engine was all done in Maoxiong, so Mi Lijia needed to import the engine from Maoxiong.

Mi Lijia's Atlas-5 launch vehicle uses the RD-180 engine as the first stage power engine, and the second stage power engine is the Centaur rocket.

With a length of 58.3 meters and a diameter of 3.81 meters, the Atlas-5 launch vehicle weighs nearly 550 tons and has a payload of several tons.

In 1997, the two sides signed an agreement under which the Power Machinery Research and Production Consortium provided 101 RD-180 rocket engines to Mi Lijia, and the supply continued until 2018 according to the plan at that time.

In fact, Mi Lijia does not plan to continue to use the RD-180 engine of Mao Xiong, and even hopes to get rid of the dependence on the RD-180 engine in 2019.

However, since Mi Lijia's own replacement model has not yet been put into use, it has to postpone the target time node of getting rid of dependence to 2022.

The Mao Xiong's power machinery research and production consortium also continues to deliver RD-180 engines to Mi Lijia.

In fact, Mao Bear also has another model of rocket engine that is also exported to Mi Lijia, namely the RD-181 engine.

So the relationship between the woolly bear and the rice grain family is really messy.

Compare the specific impulse and thrust of the engines of the three companies.

Galaxy Technology's specific impulse is 471 seconds and the thrust is 547 tons.

Mi Lijia's F1 is 264 seconds of specific impulse and 691 tons of thrust.

The RD-180 specific impulse of the woolly bear is 337 seconds and the thrust is 423 tons.

The RD-173 specific impulse of the woolly bear is 337 and the thrust is 847 tons.

From the point of view of specific impulse, the hydrogen-oxygen engine of Galaxy Technology is the first, the RD sequence of the woolly bear is the second, and the F1 of the rice grain family is the third.

From the point of view of thrust, the RD-173 of the woolly bear is the first, the F1 of the rice grain family is the second, the hydrogen-oxygen engine of Galaxy Technology is the third, and the RD-180 of the hairy bear is the fourth.

As for the rocket engine that Mi Lijia and Mao Xiong are still developing, and the rocket engine with a thrust of 500 tons in Dongtang, these have not been put into use.

"Tongxing, if you use this rocket engine, how far can you launch a 1-ton item, I mean inside the Blue Star." Huang Haojie asked.

When Qin Tongxing heard this, he immediately knew what Huang Haojie had in mind, he clicked on the holographic projection and quickly calculated.

With the cooperation of cloud supercomputing, a rough result came out.

"If high-density metallic oxygen and metallic hydrogen are used as propellants, the entire rocket system is about 85 tons, and about 1 ton of material can be launched to 1.6~17,000 kilometers away."

"What is the speed of each stage?" Huang Haojie then asked.

"The atmospheric phase of the launch is about 2 kilometers per second; The low-earth orbit phase is about 6 kilometers per second; The re-entry phase is about 7 kilometers per second. Qin Tongxing told the data.

"The overall weight of the rocket is 85 tons, the payload is 1 ton, and the range is 1.6~17,000 kilometers. The speed of the first section is 2 km/s, the speed of the middle section is 6 km/s, and the speed of the last section is 7 km/s. Huang Haojie said as he recorded the data.

This thing is definitely a huge deterrent, and the 1 ton payload, loading the mushrooms, is a proper strategic second kick.

However, Galaxy Technology does not have mushroom eggs, and this thing can only be used by Dongtang.

After Huang Haojie packed the relevant materials, he left the Hydrogen and Oxygen Engine Research Institute directly.

……

"Mr. Huang, don't come unharmed." Fang Dongliang greeted respectfully.

After all, Huang Haojie's current identity is different from today, a proper big hooligan leader level, not to mention that he is still half of his own people, so he can't afford to be cautious.

"Sit down!"

"Thank you, Mr. Huang!"

Fang Dongliang sat on the sofa, and after the little secretary poured Pu'er tea for the two of them, he left the living room quietly.

"Today, the room team came over, mainly for a cooperative project, you take this back to the above, let them see, if there is any interest in cooperation"

Huang Haojie handed a special memory to Fang Dongliang.

As for the content, Huang Haojie didn't tell Fang Dongliang, after all, this thing is quite sensitive, and if one less person can know, try to have as few people as possible.

Seeing Huang Haojie solemnly handing over the memory to him, Fang Dongliang didn't ask anything, so he solemnly took it.

After drinking a cup of tea, Fang Dongliang hurriedly said goodbye and left.

……

The next night.

is still the living room, or Huang Haojie and Fang Dongliang.

"This is the letter from above."

Huang Haojie took it and opened the envelope, which contained only two simple words "agree".

"Where's the memory?"

Fang Dongliang hurriedly handed him the memory.

For the above choice, it was not unexpected by Huang Haojie, this is a win-win situation, and there is no reason to refuse this cooperation.

Don't look at the hydrogen and oxygen engine of Galaxy Technology, which uses hydrogen and oxygen as propellants, but in fact, Galaxy Technology's technology is more like a solid rocket engine.

It is mainly the high density of metallic oxygen and submetallic hydrogen, which brings about the shrinkage of fuel and oxidizer storage tanks.

Compared with liquid hydrogen, the submetallic hydrogen tank is only about one-seventh of the liquid hydrogen tank; The metallic oxygen tank is about three-fifths of the liquid oxygen tank.

In addition, it does not need to withstand high pressure and maintain low temperature, and can be stored at room temperature and pressure for a long time.

I don't know how much this reduces the engineering difficulty of the rocket, and the impact of the difficulty reduction is the reduction of costs.

As long as they are not blind, no one will refuse to cooperate.

And Huang Haojie's conditions are not too much, so that the space agency will transfer part of the second kicking technology to Galaxy Technology.

Huang Haojie inserted the memory into the computer, and then asked the secret to let Zhong check it to confirm that there was no problem.

"There's no problem with the stuff, I'll take it."

"Then I won't disturb Mr. Huang's rest."

Fang Dongliang finished his task and left the villa.