Small spacecraft with too much acceleration, with high flexibility, are completely unsuitable for humans and can only be used as drones.

The cloud was a bit embarrassed.In fact, it was he who asked Professor Lommon to study this small space shuttle, but now it seems that there is not much use.

This space shuttle is small in size, uses a large number of lightweight metals, and sacrifices certain properties, so as to achieve ultra-high maneuverability.

In his view, the combat spacecraft will be like a fighter, and the high maneuverability is always better.

But he forgot that high mobility must be achieved with high acceleration, human physical fitness is not up to standard, and he can't maneuver.

Now, it is not the era of personal heroes, the power of the individual, compared with the machine, is too small.

“It’s not useless.”

Yi Feng looked at the various parameters on the screen, he sighed: "In fact, it is already very good, its individual combat ability is good, the cost is still cheap, if the use of unmanned, remove the life-sustaining device and other miscellaneous things, the cost can be lower, can be mass manufacturing."

“In a way, high mobility is always good.It works well as a drone.”

"Also, if our life sciences can go further, we can strengthen the human race, then this kind of spacecraft can be used."Like what titanium bones, strengthen blood vessels, strengthen the internal organs and so on.After all, drones are easily interfered with by electronics, and humans don’t have this problem.”

Yu Yifeng whispered: "Or, the perfect use a lot, can also give birth to a group of super fighters..."

Xu Yun was staggered, which he did not expect, superhumans can instantly withstand 30 times the gravity of the earth!The two discussed privately, Yu Yifeng slightly revealed the progress of perfection, has appeared willpower potions, began animal experiments and so on.

Then he turned back, “Mr. Lomon, are there any other models?”

Professor Lommon nodded: “Of course there is!”

Their entire team studied for so many years that it was impossible to come up with a small space shuttle that could only carry two people.He clicked on another document on the screen, and a spectacular large model jumped out.

He pointed his finger and said, "This is an enhanced version of the Victory spacecraft, which I call the aircraft-001, abbreviated as the A-001, which is both a combat ship and a cargo ship."

"It is about 30 meters long, wide and height of about 18 meters, using a large amount of light metal, rated load quality of 640 tons."

“The top speed is about 300 kilometers per second, which is about one thousandth of the speed of light.However, overall mobility is not as good as that of small space shuttles.To achieve this top speed, it takes six hours to push.”

This is the real spaceship, because after all, the volume is large, carrying more energy, its maximum speed is faster than the small shuttle.

It uses the latest ion engine and is much faster than the previous Victory spacecraft.If you let this spacecraft travel to and from the earth and the moon, it will be a few hours, less than half a day.

"A-001 should be the main model in the future, we can also modify a little, the formation of various variants."Dr. Lommon turned the computer screen towards Yi Feng and others!

Yu Yifeng looked at the various parameters on the screen and carefully studied it for half a day.Including the rear a-002, a-003 and other models, are all variants of the a-001, but he is still not satisfied!

The green man's drone, the speed of the speed of the speed of light reached one-thirtyth, and now humans can only reach one-thousandth of the speed of light, he is certainly a little dissatisfied.

He asked, “Didn’t you use the latest ion engine?”How can we just get to that speed?Yes, what is the technology of the Green Light Man's UAV, and does it have controlled nuclear fusion technology?Why is it flying so fast?”

Dr. Lomon was surprised, explaining: "The Green Man's UAV uses a similar ion engine, but the energy side is still nuclear fission energy ... although it is very strange, but the truth is this..."

“The reason may be that ... it is more difficult to miniaturize controlled nuclear fusion technology.”At this point, Dr. Lommon is also very sorry, there is no nuclear fusion, it is a pity.

Yu Yifeng nodded, which he actually knew, if there was really a controlled nuclear fusion technology, scientists would have shouted.

However, he did not doubt that the green light civilization had achieved controlled nuclear fusion.If an interstellar civilization can’t achieve controlled nuclear fusion, that’s a big joke.

But to miniaturize controlled nuclear fusion in a small drone may not be an order of magnitude technology.

After all, nuclear fusion is not a thing as simple as nuclear fission, and now humans have not even touched the threshold, at most... can only say that they have seen the threshold.

"Green-light drones bring a complete set of materials technology, small-scale fission energy technology, intelligent operating systems, and more efficient ion engines.The most important of these is the ion engine.”

Dr. Lommon opened a pile of data from the computer, and drew a delicate model diagram, which is the wisdom of electric experts over the years: the ultra-high-speed ion push engine!

The ion engine, that is, the plasma engine, is a kind of electric propulsion system, which is currently quite mature in application, and the main medium of its application is plasma.Satellites on Earth used to use this engine before, but their driving force is very small, unlike today.

It uses the Lorentz force to accelerate charged atoms or ions through magnetic fields to reverse-drive spacecraft, and particle accelerators and orbital guns are the same principle.

Compared with the traditional chemical push, it is too outdated, consumes huge energy, and the final kinetic energy is not large.

The first moon landing rocket, Saturn V, is a typical chemical boost.Its first stage is equipped with 2075 tons of liquid oxygen kerosene propellant.

Once the engine ignites, it can “drink” all these “drinks” in 2 minutes and 34 seconds.

The high-temperature gas was ejected at a speed of 2,900 m/s, but only enough to send a 47-ton payload to the moon.

Of all the 3,500 tons of thrust that can be generated, a large part is used to “drag” the rocket itself and more than 2,000 tons of fuel.So its "comparison" is not high, only more than 300 seconds, the propulsion efficiency is very low.

"The higher the speed of the plasma injection of the ion engine, the higher the speed, the current latest engine jet plasma, the highest speed of 3000 km / s, that is, one percent of the speed of light!"The ratio is about 300,000 seconds, a thousand times that of traditional rockets, and the energy conversion rate is as high as 70%!”Lomond explained.

“If the engine can work all the time, it can achieve a higher speed, but limited by energy problems, its speed limit is about 2000 km / s.In order to be safe and reliable, we have set the rated speed at 300 km/s.”

Yu Yifeng silently nodded, this limit speed is actually not bad, reaching one-fifth of the speed of light.

Scientists have calculated that even with a powerful nuclear fusion energy, it can only accelerate the spacecraft to 10% of the speed of light, let alone a small nuclear fission.

The faster the speed, the more the kinetic energy required behind, and if the speed is higher, it must also involve the relativistic effect.

Humans cannot eat fat in one fell swoop.

But he was a little curious: "Why is the Green Light Man's ship so fast?"Reaching one-thirtieth of the speed of light, is it almost impossible to use nuclear fission energy?