The latest website: From the biplane propeller aircraft during World War I, to the monoplane during World War II, to the jet aircraft that appeared in large numbers after World War II, the replacement of these generations not only includes the update of the design structure of the airframe and spare parts The evolution and upgrading of materials also played a vital role in promoting the replacement.

Take thrusters, for example.

When propeller propulsion is used, the requirements for engine performance are not so high. Even if there are one or two imperfections in the design drawing, even if there is some power loss, it will not hinder the operation of the aircraft. Including the materials used to make the engine and blades, as long as they are strong enough, there is not much emphasis on other aspects.

With jet flight, the requirements are completely different.

Not only does the structure need to be designed more precisely, and the slightest error cannot be tolerated, but the materials used must also be upgraded accordingly. For example, the engine itself needs to use lighter materials as much as possible on the basis of ensuring sufficient strength. As for the material used at the jet port, the performance index of high temperature resistance must be added.

It is not difficult to see that the seemingly inconspicuous material science is the basis for the development of all cutting-edge technologies. Only with new breakthroughs in materials science can it be possible to develop more powerful new technologies.

Applied to the spaceship, this rule also applies.

"Hiss..." Let Jarvis do the math, and when the result came out, Stark couldn't help but gasped when he saw the numbers on the screen.

"Sir, I think the cost of this solution is too high to be worth considering."

"Can't we reduce some more?" After pondering for a moment, Stark still felt a little reluctant: "How much can the total cost be reduced by removing those fancy parts, such as surround speakers and jacuzzi?"

"Funds are mainly spent on the research and development of new materials. What you mentioned account for a very small proportion of the total cost and can be ignored." After stating this sentence, Jarvis repeated again: "That is to say, even if you remove the In addition to what you said, the cost will not drop, and it is probably still at a similar level.”

"In other words, we can only give up the idea of ​​developing a new formula by ourselves?"

Without a positive answer, Jarvis listed some new data and gave a more intuitive response: "Using the existing formula and importing related materials from other planets can reduce the cost to about a quarter. Converted into cost, the cost of this small spaceship is about 50 billion U.S. dollars."

Using the existing elements on the earth, the manufacturing performance meets the requirements, which is enough to make various materials for the spacecraft... Even with the assistance of Jarvis, the synthetic results can be simulated by building a data model, saving a lot of time and The consumption of materials and the cost can also be calculated in the hundreds of billions.

This is just the best result.

If you are unlucky, you just skip the formula with the right ratio, and always try at the ratio that is impossible to produce results, and the cost may increase further.

At worst, the final research cost may even exceed trillions.

Even if a lot of alien technology is obtained, the volume is further expanded, and the efficiency of collecting money is far higher than that of Stark Industries in the past, it still cannot bear such a huge consumption in a short period of time.

After thinking for a moment, Stark could only sigh with regret: "Well, it seems that this time we can only rely on 'import'. Jarvis, do the math for me again, if the import from Asgard How much does it cost to import materials. What I mean is, in the name of Locke, calculate the discounted purchase price."

"If you directly import the finished product, the price is very cost-effective, and it will not exceed a million credits at most." After a pause, Jarvis continued: "Converted according to the purchasing power of the currency, we only need to provide products worth 300 to 500 million US dollars. That will offset that cost.”

"Is it so cheap?" It was much lower than expected, and Stark was surprised again.

"The previous figure was calculated on the premise of 'you develop the spacecraft engine yourself'. Like the material formula just now, the funds are mainly consumed in the research and development process." Jarvis immediately gave an explanation: "If you directly The cost of ordering engines from Asgard and other accessories that cannot be manufactured by ourselves for the sole purpose of 'putting together a spaceship' is actually not too high."

"Uh…"

"After all, what Ms. Lilima needs is only a small spaceship. According to the information brought back by Mr. Locke, this type of spaceship is only an entry-level spaceship, whether it is on Xandar or other spaceships that have entered the interstellar era. On the planet, the price is not too expensive."

After all the calculations, it can be summed up in one sentence - but if Van Stark wants to develop something by himself, the manufacturing cost will roll up, the more he insists on "using earth technology", the final consumption will be bigger.

Faced with such an analysis result, Stark had to fall into deep thought.

This pondering took more than half an hour.

It wasn't until Jarvis reminded again, "There are guests coming", that Stark woke up from the entanglement and withdrew his wandering thoughts.

"Rod? Why is he here?"

"I don't know yet. However, I analyzed Colonel Rhodes' facial expression. He seems to have something important to do." After answering this sentence, Jarvis continued, "He has arrived in the living room, and he needs to be notified to come down." Is it?"

"No, I'll go up." Waving his hand, Stark turned off the translucent screen suspended above the table, turned and walked towards the elevator.

After several expansions, the laboratory located under the mansion has expanded several times.

Not only has the area increased ~lightnovelpub.net~ the number of layers going underground has also increased several times. At this moment, the floor where Stark is located is the seventh floor underground, which is nearly a hundred meters away from the uppermost ground.

Of course, the reason why he didn't let Rhodes come down to the laboratory was not because of how far it was.

The key is Rhodes' identity.

Although it is a close friend relationship, Rhodes is still a colonel serving in the army after all. If he came here, accidentally saw something, and was asked by his superiors in an orderly tone after returning...

He didn't want to embarrass Rhodes, and he didn't want to break his friendship with him, so Stark cut off the source directly, and didn't bother to let Rhodes come here, lest he accidentally see something he shouldn't see.

Taking the elevator, Stark quickly returned to the ground and appeared in front of his friends.

"Hi, buddy, long time no see~." Seeing Stark, Rhode stepped forward and gave him a big hug: "How are you doing recently? Where is the little guy, let me see~."