The first cosmic speed is a threshold. If you want the satellite to launch into the sky and run around the planet instead of falling down, you have to make the satellite have enough speed. This speed is the first cosmic speed, which is smaller than this speed. It's like a cannon firing a shell. No matter how far it flies, it still falls down.

Now, Dr. bull said that the cannon had reached the first cosmic speed, which certainly shocked Qin Guan. If so, that is to say, can it really be used to launch satellites?

"So, can you reach this speed when you go out of the muzzle?" Qin Guan continued. If you can reach this speed when you go out of the muzzle, you need to continue to slow down in the process of leaving the atmosphere. Maybe if you go out, the speed is not enough and you have to fall down.

Dr. bull shook his head: "at the time of the muzzle, the speed was still worse, so what we want to launch is a rocket booster. Finally, with the help of the power of the rocket, we can push the shell to the first cosmic speed, which is the time to go out of space."

Qin Guan nodded. That's almost the same. Rocket propelled projectile is a common projectile of large caliber artillery. In order to increase the range, the warhead is propelled by rocket. The range of this kind of projectile can increase by about half.

"If this experiment is successful, we hope to build a cannon with a caliber of more than one meter. After all, the caliber of this cannon is still relatively small. If we want to launch a satellite, the size of the satellite is greatly limited," Dr. bull said. Now, their cannon is long enough, but the caliber is not enough. What kind of satellite can they launch with a caliber of 400mm? The diameter of the satellite should be at least more than one meter, which is of practical value? Moreover, if the caliber of the cannon reaches one meter and enough propellant is added, there will be about two tons of satellites, which are already large among the satellites, which has full practical value.

"So now, what are the shells we fired?" Qin Guan didn't answer Dr. bull's words. After all, the investment in using the guns of abandoned battleships to transform is acceptable. If we continue to build new guns, the investment will be very high. If there are still good results and no results, it's just to meet the personal hobby of this artillery genius, It's not worth the loss to invest a lot of money in building a big toy for him.

Qin Guan certainly knows that ordinary Iowa Class Battleships use mk8 APC shells. These shells are quite huge, weighing 1224.7 kg. More than a ton of shells. If a shell goes down, a basketball court will become a terrible pit, and people nearby will be killed. It is so powerful. The terrible power of this kind of artillery, It is also the favorite thing for some war maniacs. Just compared with the length, a warhead is 182 cm long, which is the same as the height of a tall man. If the propellant is included, it will exceed the height of two people!

Now, what will happen if the satellite is launched? What about this warhead?

"According to our calculation, if we want to use this cannon to launch shells to reach the first cosmic speed, the warhead weight of the shell can not exceed 100 kg." Dr. bull said: "therefore, we specially made a simple warhead. It has a thick metal layer outside and only simple instruments inside. After going to heaven, we will send a broadcast to the world."

Speaking of this, Qin Guan immediately remembered the first man-made satellite in the Han Dynasty. This man-made satellite was broadcast. Now Dr. Boer is only studying artillery and is definitely a layman in satellite research. Therefore, it is enough to let the satellite broadcast after it goes to heaven.

"What's on the radio?" Qin Guan asked.

"Super cannon, launch satellite, Dr. bull, dream come true," Dr. bull said seriously.

Suddenly, all the people present tried to hold back and don't let themselves laugh. This is the Western way of thinking. At home, the ancient culture makes people learn to be modest, while in the west, they are arrogant. At this time, Dr. bull certainly wants to show his credit.

Qin Guan nodded: "well, that's it."

The state doesn't pay any attention to this project at all, and it won't pay attention to it. It was all made by Qin Guan himself. Now, Dr. bull wants to use this cannon to launch satellites to become famous, so let him become famous.

"But do you need the help of our space TT & C network?" Qin Guan asked.

In that parallel time and space, the North kimchi country was quite arrogant. From time to time, it conducted nuclear tests and launched missiles, especially in the name of launching satellites. However, although they could launch, they had no measurement and control ability. Of course, they didn't have to worry. As long as they were launched, they wouldn't succeed, Soon there will be a survey ship from Eagle country. Only launch, not monitoring, that is not perfect space technology.

Now, Dr. bull is also going to launch a satellite. Do you need measurement and control?

Dr. bull shook his head. "No, our shells don't need any control."

This is the firing of shells, not rockets. The process of rockets is cumbersome. Several stages of rockets fall off in turn and ignite again in the air. Using giant guns to launch satellites is one thing. Firing is successful. It's so simple. After firing shells, even if the task is completed, there is no need to control, so you don't have to bother the space survey ship to come, but, It would be better if the space agency could monitor it.

"Well, if it fails to launch, will it fall?" Qin Guan asked. If it can't reach the speed, it will fall. If it falls, where will it fall?

"We won't fail, I'm sure." Dr. bull is confident that nothing is beyond his consideration. He has been waiting for this day for a long time.

"We'd better carefully design the launch direction," Qin Guan said. "If we launch directly to the East, it will be a big trouble if it falls into the capital or the nearby population gathering area."

Even if the shell is less than 100 kilograms, the impact will be disastrous. Therefore, this test firing is definitely not a children's play. Qin Guan can't afford to be responsible for an accident.

"Yes, if our cannons can be moved to the coast, once the launch fails, the shells will also fall into the Pacific Ocean, which will be much safer." the scholar also said.

Now it's in the west, launching towards the East, which is too dangerous. However, the rotation of the planet is from west to East. Therefore, most rocket launches are also from west to East, making full use of the linear speed brought by rotation.

The cannon can't be moved. When it is welded into such a monster, it can only stay here.

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