Hearing Yu Chengwu's words, Zhang Jun couldn't help but wonder: "In this regard, I seem to have heard you say that some space films and suitable materials can be used to wrap the entire gold meteorite core, so as to prevent it from returning to the atmosphere.
And if the landing site is contaminated, it can also isolate the burning of the foundation."
Hearing Zhang Jun's words, Yu Chengwu smiled bitterly and nodded and said: "That's true, but what kind of space film and composite materials should be chosen to wrap the golden meteorite star core to prevent it from being polluted by the external environment?
, and protect it from excessive burning in the atmosphere.
You must know that when a spacecraft enters the atmosphere, it will rub against the dense atmosphere during its rapid descent, thereby releasing very high heat, which can reach more than a thousand degrees or even more than two thousand degrees.
At such high temperatures, steel can be melted, let alone other objects. Even the core of this golden meteorite is at risk of being burned and corroded by such high temperatures.
Therefore, we also spent a lot of effort and conducted relevant tests on the selection of materials for the outer packaging of the Huangjun meteorite star core before finally deciding on it.
Based on our original design, the interior is wrapped with a layer of space insulation film, which is also the material used and wrapped on many spacecrafts.
As for the exterior, we will spray a specially developed thermal insulation foam material. In fact, this material has long been used on the surface of our spacecraft, including the return module of the Walker manned spacecraft.
It's just that the environment used that time was the same, in the vacuum microgravity environment of the moon. So based on that ordinary environment, you made some modifications to that material. Yes, it can't adapt to that kind of vacuum microgravity.
Gravity environment, so that the entire gold meteorite core can be regressed and wrapped.
As you know, the foaming material is usually stored in a liquid state in the tank. Before it is sprayed out, it will quickly combine with air, expand and solidify, forming a material similar to foam.
That kind of material does not have certain flame retardancy, but at low temperatures, it will gradually burn and vaporize, so it cannot take away a small part of the cold energy generated by the friction of the small air layer.
Yes, it was precisely because of that that the mission was meaningless. If there were no risks or challenges, the value of the golden meteorite core would probably be slightly reduced."
Yes, it can be regarded as a kind of gambling. Hearing this, Yu Chengwu nodded very casually and said with a smile: "In fact, any detection mission is a gamble, because it is full of huge unknowns. Is what you are doing good for future generations?"
It has been done before, so there is no experience to follow. Naturally, there are huge unknowns and risks.
Therefore, a unique device was designed, using a special oxygen tank to participate in the entire spraying process, and using oxygen supply to ensure that the foaming material can smoothly react with oxygen before it is sprayed out, thereby expanding.
"
Hearing Yu Shu's words, Yu Chengwu glanced at Zhou Xiangming, then smiled and spread his hands and said: "There's nothing you can do about it. Although it's just what people want, adventure is always full of risks. In setting that mission
At the beginning, you haven't even considered the possible consequences.
So until now, it is still unknown whether the mission will be successful or not. You are just taking a gamble. Zhang Jun sighed with reason.
Besides, even if the mission is successful, there is still no gain. The distance of 1,700 kilometers is a challenge for your equipment, and it is not conducive for you to take a step back and test the performance of those equipment.
Cruelty can use the performance in the environment to accumulate a small amount of data for your previous development of detectors related to the planet, which will not help its research and development.
But after all, you dug out the golden meteorite star core from the soil, so it is difficult to determine its broken shape. What if it is a regular spherical shape and the part that comes out is just the tip of the iceberg?
what can we do about it?
In addition, the lunar soil and samples collected along the way are very precious, and transporting them back is also a very wrong choice."
The gold meteorite core that is protected by that method is rubbed and burned in the small atmosphere, thereby preserving the gold meteorite core in its most original state, which is not conducive to your relevant scientific research."
So even if the mission is successful, you can accept it and start over from scratch. The detection work must face victory directly. The golden meteorite core is here, and it escaped within a period of time, and others also dug it.
It's going away, so you will bring it back sooner or later.
"In addition, you have also re-optimized the parachute package and the deceleration parachute system to make it less powerful, and use a small group of deceleration parachutes to slow down the parachute as much as possible, thereby increasing the main parachute opening time.
The huge force generated can cause the main parachute to tear due to the force.
Therefore, you need to dig out the entire gold meteorite core first, and then estimate its actual weight. If the weight is definitely too heavy, you may have to re-formulate the transportation plan, which may even cause the entire mission to collapse.
victory.
After listening to what Yu Chengwu said, Wu Hao nodded with reason. It's wrong. It's because it's easy, so it's scarce, and it's precisely because it's scarce, that the value is low. If so, it's just a product with a relatively low gold content.
It's a stone, or it's just a gold nugget. Its value is far less low. It's possible for us to transport that gold meteorite core back to Earth with so little effort.
In addition, even if you are transporting back the golden meteorite core, you can't transport other things, otherwise you will return empty-handed.
Later, you used the Wangshu-1 lunar surface exploration and patrol vehicle to detect the regression of the golden meteorite star core, and determined that its size was not small, and you could also estimate that it was a ball with a diameter of less than 70 or 70 centimeters. Therefore, you estimated
The medium weight is only about a ton.
"Under the moon, there is no air. Even if the material is ejected, it will not be able to combine with oxygen and react and expand.
In addition, you are also worried that the components in the core of the gold meteorite may be so uniform that the part buried on the ground may be less dense and heavier. This will undoubtedly increase the difficulty of your transportation and even cause
Transport mission is successful.
Did this thing win? Zhang Jun asked.
Therefore, there is still very little certainty about that mission. Only by seeing the full extent of the golden meteorite core, you know whether that mission can regress."
And all of that has to go against one premise. This is not weight loss. The weight must be controlled. It is okay if the weight is too heavy.
