Five Hundred and Eighty-Nine Four Fingers

Four consecutive sets of booster rockets were exhausted in less than 20 minutes. After the feeling of pushing back completely disappeared, the battleship threw away the last set of booster engines, and its appearance returned to its original state. At this moment, only the main engine was left to propel the battleship, and the acceleration effect was far less obvious than that of a rocket.

Huang Bowo breathed a long sigh of relief in the chair: "Okay, the duty officer stays, and the others are free to move about. Ye Han comes with me!"

After finishing speaking, Huang Bo stood up, tilted his head at Ye Han with a smile.

There is no gravity in the universe, and with the existing human technology, it is impossible to install any artificial gravity equipment on 024.

But the people in the battleship can’t always float around, so the military thought of a way. All the floors in the battleship are made of magnetic materials, and the cabin partitions and ceilings are made of non-magnetic materials. Shoes, the crew can walk around in the battleship.

However, magnetic shoes are not gravity after all, and walking with this thing is very awkward. Many people would rather float around in a battleship than wear this thing.

Ye Han had just boarded the ship, and he was in a hurry when he came. Before he had time to get the magnetic shoes, he immediately floated up after unfastening his seat belt. He immediately grabbed the chair and flew lightly to the cabin door.

Seeing this, Huang Bo laughed, took off his magnetic shoes, and floated out of the bridge with Ye Han: "Time flies, I still remember when I first met you, you were a lieutenant, it's only been a few years In time, you will sit on an equal footing with me."

"Do you still remember me?" Ye Han was very surprised.

"Why don't you remember?" Huang Bo looked back at Ye Han, "I was the one who asked you to join the fleet."

"Yes, I always remember." Ye Han said, "If it weren't for you, I wouldn't be able to wear power armor."

"That has nothing to do with me. If you don't work hard, no one can help you." Huang Bo waved his hand, suddenly reached out and grabbed the handrail fixed on the bulkhead, stopped outside the door of the captain's cabin, and pressed his thumb against the door , the hatch slid open soundlessly.

Huang Bo floated into the captain's room: "Come in, you're welcome."

Ye Han tapped his feet and slowly floated into the captain's room.

In a weightless environment, there is no difference between sitting or not. Huang Bo was not polite at all, and directly handed a document to Ye Han: "I came to you to talk about the Marine Corps."

Ye Han was puzzled: "Hasn't the people been decided a long time ago?" The battleship trial requires all personnel to be present, and the Marine Corps is no exception.

Huang Bo sighed: "It's been decided a long time ago, but he doesn't have this blessing."

"What's wrong?" Ye Han was secretly startled.

"With space blindness, the expedition mission must be hopeless." Huang Bo said.

Ye Han twitched the corners of his mouth: "It's too unexpected. I didn't prepare at all. I came up with my wife alone... Captain, doesn't the expedition fleet have to be voluntary? I didn't apply at all, how can I be transferred to the fleet? "The grievance in his heart is like a torrential river, endless.

The order has been issued, no matter how reluctant you are, you have no choice but to bite the bullet and push forward, but the reason must always be asked clearly, right?

Huang Bo replied: "There are not many qualified marines in the first place, and there are even fewer with rich combat experience like you, so the higher-ups sent you here. There is really no one to find."

Ye Han secretly cursed fart, the marines were all trained by Lao Tzu, how could it be impossible to find a qualified one?

Huang Bo seemed to see that Ye Han's face was wrong, and explained: "There are soldiers, but there are no suitable officers."

Speaking of this step, Ye Han could only sigh: "What else can I say? It's been five or six years..."

Huang Bo's eyes widened, his face full of astonishment: "Five or six years? Who told you?"

"Isn't it?" Ye Han was stunned, "That's what you said, I heard it was said during the meeting."

"That's fart." Huang Bo said without hesitation, "I know about this, let me tell you this, the person who said this is a half-understood two-handed knife, who doesn't understand the current aerospace technology at all. Not counting, just tell the first brother two and a half to three and a half years, because of this, he almost rose from a major general to a senior colonel."

Ye Han was so shocked that he couldn't close his mouth: "How long is it not five or six years? I heard that it takes more than three months for a warship to fly from Earth to Mars.

According to this calculation, it is indeed more than two and a half years to fly to Jupiter! "

"That's because your calculations are wrong!" Huang Bo said bluntly, "You all came out of the crash course, and you only learned a little bit, so you don't calculate like you at all."

"How long will it take?" Ye Han asked eagerly.

He didn't care about major generals being demoted to colonels, he only cared about the exact time needed for the fleet to go back and forth.

"It's quite complicated to say, and I'll do the math for you." Huang Bo stretched out a hand and bent a finger, "We didn't choose the time of departure at random. We planned to set off from the moon at this time and place. Yes, first of all, for the earth, the fleet comes with a speed bonus given by the moon, you understand that?"

In order to increase the initial speed, the military had to think of ways, even if he was a real captain in the sky, he would have to have the same number if he wanted to explain it clearly.

"Understood, the speed at which the moon revolves around the earth." Ye Han nodded.

"That's right, it's this one, about one kilometer per second." Huang Bo bent his second finger, "Then it's the booster rocket that accelerates. I don't need to talk about that, right?"

Ye Han asked curiously: "What's the speed?"

Although the duration of the booster rocket is short, it can provide the battleship with a higher initial speed, which shortens the acceleration time of the main engine. The higher the initial speed, the shorter the time required to fly to Jupiter.

"I can't say right now, but I can tell you that with the boost of the rocket and the propulsion of the main engine, the speed of the fleet when it reaches Earth is about twelve kilometers per second."

Ye Han nodded: "It's enough."

"Where is this enough?" Huang Bo bent his third finger, "After flying close to the earth, the fleet will use the gravitational slingshot effect to accelerate again."

"Can you use a gravitational slingshot from the moon?" Ye Han was amazed.

Before Ye Han was transferred to the training team, he knew about the gravitational slingshot, but he never really understood what the gravitational slingshot meant.

Simply think about it, the spacecraft is pulled towards the planet by the gravity of the planet, just like a stone falling to the ground, it is not difficult to understand the speed bonus, but when leaving the planet, it is not the same as being pulled by the gravity of the planet, and the acquired speed Return to the planet?

It wasn't until he came into contact with astronautics that he realized that his thinking was too simple.

If the planet is fixed, the spacecraft cannot use the planet's gravitational force to accelerate, but one of the most basic definitions of physics is that absolute motion is relatively static, and the planet always revolves around the sun!

While the spaceship is approaching the planet, the planet is running continuously. The spaceship flies behind the planet. The gravity of the planet is like an invisible rope pulling the spaceship. The spaceship is equal to being pulled by the planet to speed up. So the spaceship gets the speed bonus given by the planet.