Hand rubbing nuclear fusion live in the wilderness

Chapter 337 The Possibility of One Meter Per Second Flying Away from Earth

The next day, the sky was clear and the blue sky was as clear as jasper.

The "Space Shuttle Zero" that has been carried out is lying quietly in the test site like a beast waiting for orders.

From early morning to noon, Han Yuan quickly checked the space shuttle one by one to complete the final adjustment.

This is the last check before takeoff.

Time passed bit by bit, at noon, there was almost no wind, but the sun hanging in the sky was quite vicious.

This is a bit too hot for living things, but it is the best time for the zero space shuttle to convert photoelectricity.

After exiting the test site, Han Yuan returned to the control room and glanced at the time on the monitor.

56:43:[-].

It was still ten and seven minutes before the take-off button was pressed.

Zero's launch was not exactly on time at twelve o'clock, and there was some deviation.

This is the result of his calculations.

Although the space shuttle went to the sky is not all smooth sailing, but in the absence of accidents, the time from take-off to orbit is fixed.

In Korean won calculations, the zero number will start at [-]:[-] noon.

The three electric propulsion engines arranged at the bottom will increase the power step by step.

After two hours and 23 minutes, it will reach an altitude of 68 kilometers above the ground.

At this point, the output power of the electric propulsion-free medium engine will gradually decrease, but it can still maintain the lift.

At the same time, the electromagnetic propulsion system at the tail will start.

After the electromagnetic propulsion system is activated, the flight trajectory of the space shuttle will no longer be a straight line, but will draw an upward arc in the sky like a curved slope.

After one minute and 27 seconds of warm-up, the output power of the electromagnetic propulsion system will reach 60.00%.

60.00% of the power of the three electromagnetic engines can already support the flight of Zero.

After the electromagnetic engine is warmed up, it is theoretically calculated that Zero will reach an altitude of 76 kilometers.

This distance is already close to the warm layer, and the air will start to become thinner.

However, the electric propulsion engine will still run to reduce the consumption of part of the liquid xenon working fluid until the altitude of [-] kilometers.

Although the distance of four kilometers is not a big deal for the space shuttle, it can still save a little working fluid.

This is one of the differences between Space Shuttle Zero and a launch vehicle.

If a launch vehicle is used to send a satellite into the sky, the process is not long. Normally, 10 seconds, or [-] minutes, is enough from take-off to orbiting the satellite.

But it's a completely different story for the South Korean won.

From the beginning to the end of the space shuttle Zero, its flight speed is not very fast, so it takes a long time to lift off.

Even in a low-earth orbit of 160 kilometers, its speed is far below the first cosmic speed.

He set the Zero vehicle at a speed of 160 kilometers per second in a low-Earth orbit of 5.3 kilometers.

The speed provided by the two-stage booster rocket is similar to that of ordinary rockets when sending satellites.

It's just that when they heard this, most of the audience in the live broadcast room were immediately puzzled.

【5.3km/s? 】

[The requirement for the first cosmic speed, I remember it is 7.9 kilometers per second, right? 】

[Five kilometers per second can't send satellites into orbit, anchor, your flight speed is wrong, right? 】

[Is the anchor suddenly retarded?The first cosmic speed can be set wrong. 】

[Is it a replacement? 】

[What the hell, if the anchor is wrong, please change it quickly, don’t go to the sky later, if the speed is not up to the requirement, it will be miserable if you fall down. 】

[The first cosmic speed refers to the speed at which an object moves in a uniform circular motion around the earth near the ground; 7.9km/s. 】

[So many people, it seems that they have not learned physics well. Is your first definition of cosmic velocity like this?A group of children with low IQ, watch some technology live broadcast, let's watch beautiful women dance, they don't need brains. 】

【? ? ? ? ? ? 】

[You're gone upstairs, you know so much, so tell me. 】

[A group of chickens, listen up, theoretically speaking, as long as an object always has extra power, it doesn’t have to reach the first cosmic speed to fly out of the earth, even if it keeps flying upwards at a speed of 1 meter per second, the same It can also fly off the earth. 】

[1.1 meter seconds to fly out of the earth?what are you kidding 】

[Bullshit. 】

[The first cosmic speed display? 】

[Actually, what he said is correct. The so-called first cosmic speed is used to maintain orbit without power. If you always have thrust and can resist gravity and air resistance, cosmic speed does not matter. 】

[One meter per second, as long as you can maintain this speed, you can fly out of the solar system or the Milky Way, let alone the earth. 】

[? ? ? ? ?Did I take fake physics in high school? 】

[Don't talk, if it can fly out of the earth in 1.1 meters per second, why does the rocket accelerate to 7.9km per second? 】

[Anchor, what's going on?Can you really fly out of the earth at this speed? 】

In the live broadcast room, the [-]-figure audience quarreled again, and both sides argued with each other incessantly.

Some viewers believe that only when the speed reaches 7.9km/s can they break through the gravity of the earth and become a satellite orbiting the earth. This part of the audience accounts for a large number of people, more than half.

Another viewer believes that as long as there is a steady stream of power, even at a speed of 1.1 meters per second, it can fly out of the earth.

The differences between the two sides are not small, and the barrage in the live broadcast room is about to start personal attacks.

Han Yuan looked at the barrage, shook his head slightly, and said:
"In fact, as long as it can resist gravity, resistance and other forces, it can fly out of the solar system at a speed of 1.1 meters per second."

"The so-called first cosmic speed and second cosmic speed refer to the speed at which you are only given an initial speed without continuous power supply, allowing you to circle the earth or escape from the earth."

"In this case, the object does have to reach 7.9 kilometers per second and 11.2 kilometers per second before it can escape gravity or fly to other planets."

"If you have a certain amount of thrust, cosmic velocity doesn't matter."

"Suppose you have a spacecraft flying away from the earth at a speed of 1 meter per second."

"And the power provided by its engine can not only resist various resistances such as gravitational potential energy and air friction, but also keep the space shuttle at a speed of 1 meter per second. It is completely possible to fly away from the earth."

"It doesn't break any laws."

After a pause, Han Yuan then added:
"Actually, strictly speaking, the cosmic speed is not an accurate statement."

"To be precise, it should be the cosmic speed, because the speed is a scalar, and the speed is a vector (vector)."

"The first cosmic speed refers to the speed (speed) of moving in a circle around the earth's surface without falling."

"That is, the speed of motion at a height of 0 km is calculated as the gravitational force is equal to the centrifugal force of circular motion."

"But according to the principle of kinematics, it is completely possible to continue to accelerate and slowly reach the speed of re-orbiting operation."

"If enough energy can be provided, the speed can be added at an acceleration of 1m per second."

The audience in the live broadcast room listened in a daze, but they also roughly understood where the previous debate was.

[If this is the case, wouldn’t it be fine for me to carry more fuel for one plane?The speed is not enough, time comes together, sooner or later it will be able to fly out. 】

Soon, there were questions from the audience in the live broadcast room.

This represents the confusion of some viewers. In the eyes of these people, it is impossible to fly out of the earth if the speed does not reach 7.9km/s.

Seeing the problem, Han Yuan smiled and said, "In theory, this method is feasible."

"For example, the aircraft I made before used electric propulsion - no propellant engine, and gallium lanthanide silicon solar power generation panels."

"If it weren't for the high demand for working fluid, it would be able to fly into space at a speed of one meter per second under the condition that it can receive light for 24 hours."

"As long as you have enough energy, it can be done."

"Just don't forget one thing."

"Fuel, no matter what it is, it has weight."

"Even if you use controlled nuclear fusion, it needs the corresponding deuterium or tritium."

"The slower your speed, the more gravitational resistance you have to fight against and the more energy you consume during your ascent."

"So even if it can fly to outer space at a speed of one meter per second, the energy consumed will be huge, and the gain outweighs the loss at all."

"If it is fossil fuel, then the weight will be even more exaggerated, and there may even be situations where too much fuel is carried, resulting in insufficient engine output power and insufficient thrust for the spacecraft to take off."

"On this point, on this point, there is a simple formula called 'Tsiolkovsky's formula', which can be referred to."

"That is, Vm = Vr x ln(M1/M2)". "

"Vm represents the highest speed that the rocket can reach, Vr represents the fuel injection velocity, M1 and M2 represent the initial total mass and final mass of the rocket, and ln" represents the natural logarithmic function with the constant e as the base. "

"With this formula you can calculate that the increase in the amount of fuel does not effectively increase the speed of the rocket."

"So for fossil fuels, the optimal choice is actually to accelerate the speed of the spacecraft to a certain speed in a short period of time."

After thinking about it, Han Yuan added another sentence:
"Of course, if small-scale controllable nuclear fusion can be produced, the slow speed you want to leave the planet and enter space is achievable."

(End of this chapter)