"The Eagle ship?" The old cat took off his headphones and didn't understand what Tang Yue meant.

"The ascent of the Eagle, the little guy we hit up, isn't it still docked on the United Space Station?"

The old cat waved its paws, of course it knew that the ascent of the Eagle spacecraft was still docked on the United Space Station, and it and Tang Yue had gone through a lot of hardships and dangers before they successfully sent the Eagle spacecraft into the arms of the space station. Looking back on it to this day, the old cat feels that he was really crazy at that time, so he would agree to such a risky action.

But the ascent of the Eagle spacecraft is no longer a vehicle for re-entry, it is a one-time vehicle, and it has already completed its mission after entering orbit.

Today's Eagle spacecraft is just a large piece of space junk, which is supposed to be discarded, and Mai Dong did not discard it only because at the moment when the earth disappeared, man-made space junk is precious.

"The Eagle spacecraft no longer has the ability to enter the atmosphere." The old cat said, "It's long gone, and the propellant is running out, so you're going to let that girl land on a scrapped spaceship?" ”

"According to normal flight standards, the Eagle spacecraft has been scrapped, but it must have design redundancy, and there must be room for squeezing...... Right? Tang Yue's pupils dilated, and his voice was lowered. The old cat was secretly surprised when he heard this, Tang Yue was a complete gambler's thinking, he wanted to approach the design limit of the spaceship infinitely, and bet that it could survive.

It's like a city is about to be destroyed, and you have the last Boeing 737 to escape, but the Boeing guys tell you that the airplane is at the end of its life.

At this point, you have to bet that the designers of the aircraft have set aside enough safety redundancy, even though the plane can only fly for 10,000 hours, you also have to bet that it will not go wrong for the 10,000th hour.

Last time, Lao Mao and Tang Yue also gambled like this, but fortunately, they won the bet.

"Except for the Eagle spacecraft, we don't have any other vehicles capable of entering the atmosphere, and the space station and Orion are structurally not allowed, they will inevitably disintegrate and burn up." Tang Yue said, "But the Eagle spacecraft is designed to enter the atmosphere, it is a blunt lifting body, not a fragile truss structure, so the space station can withstand the resistance and overload!" ”

The old cat pondered in silence.

Tang Yue's idea is very bold and crazy, but there is nothing wrong with it, structurally the Eagle spacecraft is indeed much stronger than the space station, and the space station will die when it enters the atmosphere, but the Eagle spacecraft may still have a glimmer of hope.

"If we have a way to stabilize the re-entry posture of the lander, then the thermal insulation coating on its surface may be able to help Mai Dong overcome the thermal barrier." Tang Yue's speech was very fast, and without thinking, he had obviously been thinking about this question for a long time.

Thermal insulation and ablation materials are unique to the lander, and the belly of the Eagle spacecraft is covered with a solid layer of black thermal insulation tiles, which when entering the atmosphere with its belly facing the ground to resist the high temperatures caused by air friction.

The thermal insulation tiles on the lander are the only hope of resisting the thermal barrier.

"By the time we first landed, the Eagle spacecraft's heat shield had already burned out." Old cat reminder.

"The most popular thing people on the planet do is to set aside at least double the redundancy." Tang Yue raised two fingers, "Do you remember Yang's garbled?" He told me that the heat insulation tiles on the lander could theoretically support the Eagle spacecraft to dive three times. ”

"Yang garbled?" Of course, the old cat remembers this person, and the heroic deeds of trying to make Laoshan white flower snake grass blister canned Swedish herring make it vivid, "Didn't he make compressed biscuits in the nutrition center?" What does it have to do with insulating tiles? ”

"His girlfriend's brother's mentor's eldest nephew's seventh uncle and grandfather are department heads at NASA."

"But we don't know what the condition of the insulation tile on the Eagle spacecraft is now, and if it falls off and breaks, then it will replicate the tragedy of the Columbia." The old cat said, "This one needs to be carefully examined. ”

"But we at least have hope."

"It's too early to say there's hope." The old cat's face was serious, "Even if the Eagle spacecraft can withstand the heat barrier, it has no power and cannot slow down, entering the atmosphere is free fall, you put people in a tin can, and then throw them down from a four-hundred-kilometer high orbit, unless it is the Hulk inside, no one will survive." ”

Tang Yue nodded and frowned.

He is trying his best to find a feasible way to land, but this can't be delusional, Tang Yue and the old cat are gambling, the stake is Mai Dong's life, and there is no room for mistakes in the matter of human life, as long as there is a step wrong when entering the atmosphere, that girl will be wiped out.

The old cat said that the major difficulties, structural strength, high temperature thermal barriers, thrust reverser deceleration, the Eagle spacecraft can only overcome the first two at best, and the last hurdle is an almost impossible to solve roadblock. Think about how many deceleration plans the engineers on Earth designed for the complete version of the lander to land safely, and the technical nerds of the Jet Propulsion Laboratory ate instant noodles for half a year and racked their brains to design such an impeccable plan.

Now Tang Yue only has half a lander in his hand, and he is still a shell without propellant. You're too contemptuous of physics and engineering.

From ancient times to the present, all projects that flout the laws of physics are ultimately the result of bloodshed.

Anyone who tried to anger Newton would eventually be swollen in the face by the lord.

Tang Yue set up several tablets on white paper, writing "Uncle Newton's Position", "Tsiolkovsky's Position", "Uncle Braun's Position" and "Uncle Korolev's Position", and then kowtowed heavily on the table.

"Masters, please give your disciples and grandchildren a trick, if your spirit in the sky does not manifest again, the human race will be finished."

"The last problem is navigation, if we want Miss Mai Dong to land, we have to let her land exactly where Kunlun Station is." "We don't have a large number of search and rescue teams and helicopters on Mars, and if the lander falls hundreds of kilometers away, no one will be able to rescue them in time." ”

"Hey, Mr. Cat, what are you talking about?" Mai Dong appears on the screen.

"Nothing, nothing." The old cat put on the headphones, "I'm just trying to persuade Tang Yue, telling him not to hide in the bed every night to watch Japanese teaching films, otherwise it will lead to kidney deficiency...... I'm not in good health......"

Tang Yue sat on the side, propping his head and drooping his eyelids.

Seeing that the supplies on the space station are gradually depleted, the desperate situation faced by Mai Dong has been exposed again, and if the latter stays like this, his physical condition may deteriorate further.

To be honest, even if Mai Dong is next, most of the two will not live long, and the materials in Kunlun Station are also limited, but the two can help each other when they stay together. Tang Yue may not be plotting anything, in this situation where he can't eat enough to eat and can't wear warmth, even if he really wants to plot something, he is powerless, but he is in a desperate situation, and he always wants to have one more person to accompany him and share warmth with each other.

Every time he sat at the gate of Kunlun Station and watched the sunrise and sunset, Tang Yue thought to himself that it would be good if there was someone who could accompany him to watch it.

So he can say to the man, "Look, does the sun look like an egg yolk?" ”

"It is impossible to land directly with the Eagle spacecraft." The old cat walked over and pressed his shoulder, "But it's not all hopeless. ”

Tang Yue was stunned.

"Do you have a solution?"

"Nope." The old cat shook his head, "This matter has to be slow, not reckless, I need to do fine calculations, the Eagle spacecraft can help us overcome the problem of heat barriers, this is already a big step, the remaining steps need to be considered in the long run." ”