After all four groups of booster rockets in a row were exhausted in less than twenty minutes, and the feeling of pushing back completely disappeared, the battleship threw away the last set of booster engines and returned to its original appearance. At this time www.biquge.info, only the main engine was left to push the battleship, and the acceleration effect was far less obvious than that of the rocket.

Huang Bowo breathed a long sigh of relief in the chair: "Okay, the attendant stays, the others move freely, Ye Han comes with me!" ”

After saying that, Huang Bo stood up and tilted his head at Ye Han with a smile.

There is no gravity in the universe, and with the current technology of mankind, 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 has come up with a little way, all the floors in the battleship are magnetic, the cabin partitions and ceilings are non-magnetic, and then equip all the crew with magnetic shoes, and the crew can walk around in the battleship.

However, magnetic shoes are not gravity after all, and it is awkward to walk with them, and many people would rather float around in a battleship than wear them.

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

Seeing this, Huang Bo laughed, simply took off his magnetic shoes, and floated out of the bridge with Ye Han: "Time flies so fast, I still remember when I first met you, you kid was still a lieutenant, and it has only been a few years, and you are on an equal footing with me." ”

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

"Why don't you remember?" Huang Bo glanced back at Ye Han, "At that time, I still put you into the fleet." ”

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

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

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

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

In a weightless environment, there is no difference between sitting and not sitting, 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: "Haven't people already decided?" "Battleship trials require all personnel to be in place, 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 surprised.

"With space blindness, there is definitely no hope for an expeditionary mission." Huang Bo said.

Ye Han tugged at the corners of his mouth: "It's so unexpected, I didn't prepare at all, and I came up with my wife alone...... Captain, doesn't the expeditionary fleet have to volunteer? I didn't apply at all, how can I be transferred to the fleet? The grievances in his heart are like a surging river, endless.

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

Huang Bo replied: "There are not many qualified marines in the first place, and even fewer have rich combat experience like you, so the above sent you over, and I really can't find anyone." ”

Ye Han secretly scolded for farting, the marines were all trained by Lao Tzu, how could they not even 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." ”

At this point, Ye Han could only sigh: "What else can I say?" That's five or six years ......."

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

"Isn't it?" Ye Han was stunned for a moment, "It's all said so, I heard that it was said during the meeting above." ”

"Fart, that's." Huang Bo didn't choose to speak, "I know about this, let me tell you this, the person who said this is a second knife who doesn't understand half-understand, and he doesn't understand the current aerospace technology at all, so he didn't count, so he told the first brother for two and a half years and three and a half years, and he almost went from a major general to a colonel for this matter." ”

Ye Han was so shocked that he couldn't close his mouth: "It's not five or six years, but how long?" I heard that it took more than three months for the battleship to fly from Earth to Mars, and according to this calculation, it is indeed more than two and a half years to fly Jupiter! ”

"That's your mistake!" Huang Bo said unceremoniously, "You are all from the crash course, and you have only learned a little bit of the skin, and you are not as good as you at all." ”

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

He didn't care about the downgraded of a rear admiral to a colonel, only about the exact time it would take for the fleet to go back and forth.

"It's complicated, I'll do the math for you." Huang Bo stretched out a hand and flexed a finger, "The time of our departure is not chosen randomly, it is planned to start from the moon at this time and place, first of all, for the earth, the fleet comes with the speed bonus given by the moon, you know?" ”

In order to increase the initial speed, the military has tried a lot of ways, even if he is a real captain, he has to explain the same number.

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

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

Ye Han asked curiously, "What is this speed?" ”

Although the booster rocket lasts for a short time, it can provide a high initial velocity for the battleship, resulting in a shorter acceleration time for the main engine, and the higher the initial velocity, the shorter the time it will take to fly to Jupiter.

"I can't say it now, but I can tell you that with rocket boost and main engine propulsion, the speed of the fleet when it reaches Earth is about 12 kilometers per second."

Ye Han nodded: "It's enough." ”

"Where's that?" Huang Bo flexed his third finger, "After flying close to Earth, the fleet will use the gravitational slingshot effect to accelerate again. ”

"You can use a gravitational slingshot from the moon?" Ye Han was surprised.

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

If you think about it simply, the spaceship is pulled towards the planet by the planet's gravity, like a stone falling to the ground, and it is not difficult to understand that it has a speed bonus, but when it leaves the planet, isn't it the same as being pulled by the planet's gravity and returning the speed it has gained to the planet?

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

If the planet is fixed, the spacecraft really can't use the planet's gravitational acceleration to accelerate, but one of the most basic definitions of physics is that absolute motion is relatively stationary, and the planet always revolves around the sun!

When the spaceship is close to the planet, the planet is constantly running, the spaceship flies behind the planet, the planet's gravity is like an invisible rope pulling the spaceship, the spaceship is equal to being pulled by the planet to speed up, and the planet that is constantly revolving is equivalent to pulling the spaceship to run, so the spaceship obtains the speed bonus given by the planet.