Create a real spaceship, a spaceship that can sail repeatedly, a spaceship with enough carrying capacity, a spaceship with enough speed, a low-cost spaceship, so that Cao Chuan can return to Earth for the second time, this time not to get supplies, but to find a pioneer who conquers the sea of stars.

Bring them here, join the Eastern Galactic Corporation, and build a city on the moon with endless sprawl towards Mars, Venus, Ganymede, Ganymede, the asteroid belt, Mercury, Jupiter, Saturn, Uranus, Neptune, Pluto.

See the Earth from the moon, bathe in acid rain clouds at 400 degrees Celsius on Venus, travel through the complex asteroid belt, see the beautiful rings of Saturn, experience the spectacular scene of the sun eruption close to the sun, and return to Pluto's eternal cosmic world.

"What a fascinating plan, but unfortunately, in this process, people are indispensable, and it is even more fun to be missing."

"So the spaceship is a must, with the spaceship, there is a way to get people, no longer like the unmanned units created before, it will be eliminated in a few months, and the spacecraft developed this time will become a historical milestone like the Renault tank and AK47."

In other words, Cao Chuan has extremely high hopes for the spaceship, and now, only he is qualified to think so, and in doing so, others can only move forward with difficulty in reality.

As soon as he decided, he conceived the initial design of the spaceship in his mind.

"The length is 50 meters, the width is 20 meters, the crew is 50 people, the load is 90 tons, and the speed is 30 kilometers per second..."

Such a crew and scale can ensure that there is enough profit in the process of traveling between the earth and the moon; A speed of 30 kilometers can ensure that the spacecraft can travel between Earth and Mars in a short time.

With such performance, the spaceship will not be eliminated within ten years, otherwise, he does not think that the spaceship he developed will really be recorded in history, and at most it will become the tears of history.

"The rules simulation was in progress................ it took 4 hours and 15 minutes."

The results of the first rule simulation appeared, and Cao Chuan was quite satisfied when he saw the spaceship presented on the computer screen.

"Nana, what do you think?"

"It looks a little big, and besides, it's pretty fast." Combined with her own memories, Nana replied to Cao Chuan in a cold voice.

"That's right, that's exactly what I wanted, at first glance, the spacecraft looks like the Beacon Country's space shuttle, but it has a much larger interior space, a much larger carrying capacity, and more fuel saved, more opportunities to accelerate in space, and a significant increase in ultimate speed."

"But considering the actual manufacturing..."Cao Chuan whispered, still knowing that the rule simulation is not perfect, assuming that he is moving on the wrong path at the beginning, the product will also develop in the wrong direction after the rule simulation.

He carefully examined the results of the simulation: "In the low gravity environment of the moon, there is no technical bottleneck in the construction of a spacecraft weighing 450 tons with fuel and supplies, but when it comes to the earth, due to the increase in gravity, the structure will withstand a greater degree of tension, and there will be hidden dangers..."

Not only one point, but also the high cost of manufacturing, the need for higher precision sensors, detectors and other hidden dangers, he regretted a little, and found that the results of the rule simulation were not as perfect as he imagined. However, as a person with aspirations, it is really difficult to accept that he should be asked to reduce the performance of the spacecraft for the sake of feasibility.

"If it is downgraded, how can it have a chance to become a milestone product?" He paced around the room, trying to convince himself to persevere, and after a while, "Nana, bring up the trajectory of the ships of the Age of Sail." ”

Of course, Cao Chuan had this historical material in his mind, and his purpose in doing so was just to put it in front of him more intuitively.

After scanning the legend, he took a deep breath, "Then tune out the development trajectory of ships in the era of cannon giants." ”

After a few repeated glances, he slowly calmed down. He was just out of self-confidence and wanted to build a better spaceship in such a superior environment, but in reality, the leap forward in technology was not at his own will, and if he continued to explore, even if he found the blueprint scheme, the price he paid would be quite staggering. A more correct approach is to evolve gradually, slowly climbing the tech tree.

"Length 40 meters, width 16 meters, 40 people, 60 tons, speed of 30 km/s... The rule simulation was completed and took 3 hours and 21 minutes. ”

"Length 35 meters, width 15 meters, 30 people, 50 tons, speed of 35 km/s... The rule simulation was completed and took 3 hours and 45 minutes. ”

Looking for the balance point in his heart, passing through the spaceship prototype 1, the spaceship prototype 2, and the spaceship prototype 3 in turn, Cao Chuan turned to find a compromise solution.

He named it the Moon-Leaping Spacecraft, which has a length of 28 meters, a width of 11 meters, a crew of 20 people, a load of 25 tons, a speed of 50 km/s, and can carry up to 5 Earth-Moon voyages, and after overhaul, the final number of voyages can exceed 50.

As for the size, he didn't care, or rather, he had already discovered in the continuous rule simulation that the small spaceship might not be eliminated due to technological progress and productivity growth.

First of all, the earth has not yet reached the point of resource depletion, so one of the important things involved in planetary development - trade, is bound to focus on the trade of strategic materials, luxury goods, etc., and simply increasing the carrying capacity can have little impact on the profit of trade.

The small spaceship also has the advantage of being cheap, convenient, and easier to enjoy the dividends of technological progress.

Thinking about it this way, Cao Chuan found that the moon-level spaceship was the most important spaceship he should have built at present.

The construction began, through the cooperation of several robots, a dock with an area of more than 1,000 square meters was opened, and a small number of aerospace materials were extracted from the moon base of the lighthouse country, as well as the first return to the earth, and a small number of aerospace materials were obtained, which will be processed into pieces of forming plates and brackets, and assembled a spacecraft body with a tough appearance.

Then it is to divide the cabins, lay the pipelines, and load the interior with computers, instruments, engines, etc., until it is completed. The entire manufacturing process of the Moon-By-Moon spacecraft lasted for a month, and the first test flight took place immediately after the construction was completed.

Standing in a spaceship and circumnavigating the moon didn't cost much fuel at all, but it gave him the satisfaction of being completely free, and from then on, no one could stop him.

"If anything... If there were more crew members, and a mental model, it would be perfect. "After all, Cao Chuan has been exposed to too many cultural products on the earth, and he is quite interested in the mental model, which has emotions and looks like a beautiful girl.

For the next two months, he stayed on the moon, using the few precious materials left at hand, plus the available materials currently produced by the lunar base, to complete the manufacture of the second and third moon-class spacecraft one after another, and it was November 2021 in the blink of an eye.