"Airbags?" Mai Dong and Tang Yue replied almost at the same time.

In the early Mars exploration missions, the final hurdle of landing, that is, the last few tens of meters, engineers responded with a rather simple and crude method: airbag landing.

Wrapping the probe in layers with balloons, smashing them directly on the surface of Mars, cushioning and unloading them by bouncing repeatedly, is essentially the same technology as a car's airbag, very old, very simple, but quite reliable. The probe quickly inflated the airbag after disengaging the parachute, and within seconds it was surrounded by a large balloon and finally crashed into the soft airbag to protect itself.

Before Curiosity's high-end Mars crane was put into service, many of the pioneers who went to Mars relied on these simple balloons to protect themselves.

"Where did we get the airbags?" Tang Yue asked.

There are no parachutes or airbags on the Joint Space Station, and in the middle of the 21st century, when the Mars landing program is highly deepened, the primitive and extremely restrictive landing method of cushioning airbags has long been obsolete - airbags can only protect small and light landers, and today's landing missions often have loads of tens of tons, and can only use parachutes and rocket thrust reversers.

"We have to thank the Maozi NASA engineers for this...... "the old cat said leisurely, "who told them to be so fond of inflatable cabins on ships and space stations?" ”

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"Tsiolkovsky, Goddard, Obert, Korolev, von Braun, and the great gods of NASA, CNSA, RSA, ESA are on top, and they are worshipped by the younger generations!" Tang Yue stood in the hall of Kunlun Station decently, bowing deeply towards the tablet on the table, "Your souls in the sky, you must bless the landing plan as a complete success, the lives of the disciples and grandchildren depend on you." ”

The old cat glanced at the tablet on the table, and the first name was Konstantin Tsiolkovsky.

"You write, the old man's heavenly spirits may not be able to understand it." The old cat spat out a flurry of tongue-curling sounds, "You should write Konstantin· Tsiolkovsky。 ”

"Go, go, you do your job." Tang Yue rolled his eyes, "The science that said good belongs to you, and the metaphysics belongs to me." ”

"Don't you know how to tell fortunes?" The old cat propped up his head, "Count a hexagram." ”

"It's already done."

"The result?"

"Up and down, it's not good." Tang Yue replied.

"What do you mean?" The old cat glanced at him.

In metaphysics, Tang Yue is a talent, he can not only recite mantras but also tell hexagrams, if he didn't come to Mars, he might be a swaggering and deceitful charlatan. The old cat didn't understand why Tang Yue understood these things, in Tang Yue's words, "This was taught to him by the old man who lived next door when he was a child, the old man is profound, it is said that he has seen feng shui for celebrities, loves to eat cuttlefish, and the people in the rivers and lakes call him a cuttlefish, Tang Yue often buys iron plate squid to find him."

Every time the old cat denounced these things as feudal dross, Tang Yue moved the Russians out to block the gun.

Maozi is still looking for the patriarch to open the rocket.

"Unfinished, unfinished firefighting, unfinished business." Tang Yue said, "It's a big bad omen." ”

"Big bra?" The old cat was stunned, "I'll talk to you seriously, Tang Yue, what are you putting in your head?" ”

"What's in your head? I'm talking about bad omens, bad omens! Omen! Do you know what a bad omen is? ”

"Of course I know what a bra is."

"You stupid cat." Tang Yue said, "Come, read with me!" Fierce - Trillion ——! Fierce - Trillion ——! A great omen! Do you understand? ”

The old cat suddenly shut up, his face was serious, and he pointed to the table.

Tang Yue turned his head.

Mai Dong's face was cold: hooligan.

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"The hexagram of the unfinished hexagram is bad." Tang Yue sighed, "The situation is unfavorable and there are many difficulties. ”

"That's pretty accurate, isn't this where we are now? Cornered, desperate on all sides. The old cat rested his chin on the desktop, the workstation monitor in front of him flashed, and the blue screen again, the sound of the fan in the case suddenly lowered, and the old cat kicked the table leg hard, "Hell, the data is overflowing again." ”

"It's not a good sign that you can't do anything, and you hope that there won't be any problems when you land."

"Metaphysics is not useful on Mars, the things of the ancestors are only applicable to the earth, after all, the emperor and the queen of heaven are not the soil on Mars." The old cat restarted the process of the workstation, turned the monitor off and on again, "Let's look at science, mathematics and physics are common to the whole universe...... Miss Mai Dong, are you ready? ”

"OK, Mr. Cat." Mai Dong replied, "The permissions have been fully opened. ”

“GoodJob。” The old cat connected to the computer of the joint space station, and at this time the system authority of the space station was all in the hands of the old cat, which was requested by the old cat, and it asked Mai Dong to open the underlying code of the control system in turn according to the steps.

The old cat can change the behavior pattern of the space station at will, and if it wants, it can even bypass the astronauts' instructions and directly shut down the life support system in the space station, and if it does, all the creatures in the space station will not live for more than five minutes.

"Miss Mai Dong, I've taken over the United Space Station." The old cat reminded, "From now on, you should not change the working mode of the computer at will. ”

"Understood."

This is necessary work, and in order to get the Orion II spacecraft into the atmosphere, the old cat must completely change the Orion flight program, which is equivalent to rewriting the bottom software of the spacecraft. At the beginning of the design of the Orion 2 spacecraft, the engineers did not think about letting it enter the atmosphere, and there was no corresponding software backup in the computer system, but fortunately, the hardware redundancy was sufficient, and the structure and engine of the Orion spacecraft could support the programs written by the old cat.

For the old cat, computer language is its mother tongue.

The old cat had to design a safe landing route, which used to be explored by multiple research groups in an entire laboratory, because the workload was quite large - the entire EDL process could be broken down into different parts, and each stage of Entry, Descent, and Landing was worth studying, and the problems involved were many and complex, involving every piece of hardware on the ship.

Add to that the same troublesome GNC system in the software, Guidance, Navigation, and Control modules, which are tasks for computers and sensors, and can lead to a whole host of problems and papers.

The EDL system is responsible for the safe landing, and the GNC system is responsible for navigation, and the two cooperate with each other to make Mai Dong land safe and sound.

In the past, this should be a project cooperated by more than a dozen universities and scientific research institutions, from hardware to software, but it was taken over by Lao Mao alone.

After all, Lao Mao is the most awesome cross talk master and programmer in the whole universe, the most proficient in writing code among cross talk actors, and the best at speaking cross talk among those who write code.

It can talk about a lama in the east and a mute in the west, and knock out the control code for the 400-ton spacecraft to land on Mars. 8)