Bright Sword starts with the grenade flat.

Chapter 431 Liu Qi's Planetary Engine Enhancement Plan
That’s right, increasing it by more than a hundred times means increasing the thrust of the planetary engine from the original 15 billion tons to 1.5 trillion tons.

Liu Qi's planetary engine transformation plan is actually very simple, which is to inject annihilation energy into the planetary engine to increase the speed of the plasma flow ejected by the planetary engine.

Because according to conventional physical laws, if the mass of the engine's ejected material remains unchanged, increasing the speed of the ejected material can increase the engine's thrust.

Of course, Liu Qi's plan actually borrowed the design concept of the Venture Star transport spacecraft sent by Blue Star No. 2 to Pandora.

You know, when the Wandering Blue Planet was feeling complacent about using its heavy-nuclear fusion planetary engine to push its speed to 5/1000, the Entrepreneurship Star spacecraft was already able to reach a speed of 70% of the speed of light.

It is precisely because of this speed that the Entrepreneurship Star was able to fly a distance of four light years in just five or six years without a curvature engine.

The reason why the normal speed of Entrepreneurship Star is so fast is naturally because it has a very powerful engine or drive system.

The driving system of Entrepreneurship Star is a double-antimatter-nuclear fusion hybrid engine.

Inside its 1.6-kilometer-long hull is a huge 264-meter-long reactor, 99.5% of its volume is the nuclear reaction compartment, and the remaining 0.5% is the annihilation compartment.

However, this annihilation system, which accounts for only 0.5 percent of the total system volume, provides more than 95 percent of the power for interstellar navigation.

The antimatter fuel used by Startup Star is antihydrogen and hydrogen. When antihydrogen and hydrogen gather together and annihilate each other, they emit huge energy. At this time, the magnetic permeability system composed of superconductors generates an ultra-strong directional magnetic field, which injects the generated photon energy into the exhaust system.

The plasma gas it produces is 100 million times brighter than a welding arc, and the exhaust gas it emits is more than 30 kilometers long, allowing the Venture Star spacecraft to travel at 70% of the speed of light. Its exhaust gas is considered one of the most spectacular man-made landscapes.

Why not directly use the antimatter engine to reduce the size and weight of the Venture Star's drive system, instead of creating such a hybrid system!
Because the reason is very simple, that is, although antimatter will convert all matter into light energy after annihilation, this will naturally lead to a very serious problem.

That is, light has no rest mass, which means that even if the light is ejected, it will not generate any thrust to push the spacecraft forward.

But if these high energies are injected into the plasma thrusters of nuclear fusion, the situation will be different. The speed of the plasma jet produced by nuclear fusion is actually not very high, only tens of kilometers per second.

Although these are an order of magnitude higher than the gas speed of rockets using chemical energy, they are still a drop in the bucket. Therefore, at this time, the annihilation energy is injected into the plasma flow to accelerate it, so that the speed of the plasma flow can be increased.

Increasing the speed of plasma will naturally increase the thrust of the nuclear fusion plasma engine.

Therefore, the same is true for the modification plan proposed by Liu Qi regarding the planetary engine, which is to add an annihilation reaction chamber next to the planetary engine, and use annihilation energy to provide re-acceleration energy for the plasma flow ejected by the planetary engine.

The planetary engine's original plasma of only tens of kilometers per second is transformed into a plasma jet of hundreds or even thousands of kilometers per second, thereby obtaining a huge thrust bonus like the engine of the Venture Star.

However, Liu Xiu only needed to do a quick calculation in his mind to realize that Liu Qi's planetary engine transformation plan was not reliable.

Of course, this is not to say that there is a problem with the plan itself, but rather the problem of wandering on the Blue Planet. In the words of Whitebeard in One Piece, there is no ship in this era that can carry him.

The problem with this engine on the Wandering Blue Planet is that the Wandering Blue Planet itself is no longer able to bear the thrust of this new engine. You know, the structure of the Wandering Blue Planet itself is actually equivalent to an egg!

The hard crust on the surface is actually the eggshell, and beneath the crust is the soft and flowing mantle and core, which are equivalent to the egg white and yolk in the egg.

The temperature of the mantle can reach one thousand to more than three thousand degrees. Therefore, although the mantle is composed of rock, it becomes flowing rock, that is, magma, under such a high temperature.

Although the core of the earth is composed of metal materials such as iron, the temperature of the core is higher than that of the mantle, at more than 6,000 degrees, so the core is actually a flowing ball of molten iron.

And the magnetic field formed by its wandering blue star is actually generated by the rolling of molten iron in the core of the earth.

It is precisely because the interior of the Wandering Blue Planet is so fragile that the underground city was swallowed up by magma during the Jupiter crisis. After all, the thickness of the earth's crust is only a dozen kilometers.

That is why when the wandering blue planet encounters the gravity of Jupiter, the magma in the mantle beneath the crust erupts so easily.

Of course, it is precisely because the Wandering Blue Planet is actually only protected by a thin crust that its Helop Limit is so low. If the interior of the entire Wandering Blue Planet cools down, then I believe the Helop Limit of the Wandering Blue Planet will rise to another level.

Considering these, Liu Xiu could only remind Liu Qi:
"Liu Qi, your planetary engine modification plan is fine from the perspective of modification itself, but after you increase the thrust of the planetary engine by ten or even a hundred times, have you considered the feelings of the wandering blue planet?"

When Liu Qi heard Liu Xiu's words, he was stunned and asked in confusion:

"Ah! Why should I consider the feelings of the wandering blue planet when I modify the planetary engine?"

Seeing Liu Qi was stunned and puzzled, Liu Xiu could only say:

"Do you know why the base of the planetary engine is designed to be so large?"

Although Liu Qi did not understand what Liu Xiu meant by this question, he still answered:

"Because we need to reduce the weight of the planetary engine and the pressure of its thrust on the earth's surface! If it is designed too small, the weight and thrust of the planetary engine will cause the entire planetary engine to sink!"

When Liu Xiu heard Liu Qi's words, he nodded and said:

"That's right. So after you modified the planetary engine, you increased its maximum thrust by a hundred times. Do you think that the pressure can be dispersed with the current base area? Although there was a safety margin when it was originally designed, it is at most twice the limit. The consequence of more is that the earth's crust will be crushed, and then the entire planetary engine will sink into the earth and be melted by magma!"

Following Liu Xiu's words, Liu Qi's originally happy and excited expression turned depressed.

Liu Xiu naturally did not want to dampen Liu Qi's enthusiasm, so he said:
"Liu Qi, your idea is good, but sometimes you have to look at the problem from multiple angles, rather than from a single angle. If you want to increase the thrust of the planetary engine, you should actually prioritize solving the problem of the overall structural fragility of our Wandering Blue Planet!"

(End of this chapter)