"Cement... I hadn't thought about it. However, with cement, the raw materials... Oh, and that's not a problem. ”

Kardashian was halfway through the conversation and remembered who made the map, and for Pucasto, finding the right materials to make cement was a piece of cake.

The cost of paving a road and building a bridge with concrete is much lower than having a magician cast a spell. After all, today's magicians are used by Luo Di as a senior engineer, and it is a great waste to run to engage in low-level repetitive work.

"From R&D to popularization, you know how to do it. The roads we are currently building can still be used for a few years, so after the cement is made, it is more appropriate to first apply it to the river bridge, so that the travel time between cities will be reduced, and the economy will naturally accelerate its rise. ”

The later saying "If you want to get rich, you must first build roads" is not a joke, and only when trade routes are opened can the economy accelerate its growth. The backwater, closed agriculture model must be quickly phased out.

"You said one problem, but what about the second one? I don't think the internal combustion engine is as difficult as you said, but at first, if you produce it for your own use, I think it's completely sufficient. ”

"I'm not an expert on this issue, so I want to discuss it with you. ”

Roddy did not have the problem of self-righteousness, and said his judgment: "We are too short of time, and it will take a long time to achieve a full-fledged internal combustion engine for trains - the difficulty of research and development and the problem of fuel are the focus, and the reason why I chose the steam engine is because there are two large open-pit coal mines in Evtan." For trains and ships, the technical difficulty of loading a steam engine is much lower than that of an internal combustion engine, and I remember that the steam engine was very simple to operate and easy to maintain... So do you think it's reliable to use a steam engine?"

Roddy knows that there are many kinds of internal combustion engines, and he also knows the principle of piston power stroke, but knowing is one thing, how many angles of the specific crankshaft, how to do the cylinder, he is completely blind - but Kardashian is different, she has seen this information, and the amazing dragon family in her memory wants to copy a modern car engine, it is not necessarily impossible.

However, the industrial level of the Karen Kingdom is a huge chasm, maybe it will be fine in ten years, but now...

Kardashian thought about it, unless she could get a group of dragons to be workshop workers, one by one taking care of stamping casting and machining... Otherwise, there is no reliable internal combustion engine. As for oil, there is no experience in things like opening oil wells to purify them.

While it certainly won't be as difficult as research on Earth with the help of magic, the problem is exactly what Roddy said: time is too late.

"The words of the steam engine... I had seen some of the construction diagrams, and they seemed to be exactly the ones used on trains. Kardashian's memory was beyond doubt, and she nodded: "If there are enough coal mines, the steam engine does have an advantage in trains and ships, so there are indeed a lot of spars left..."

"Yes, in fact, we are already the development of the Jumping Technology Tree, after all, the problem of eating enough for ordinary people has not yet been solved. The contradictions of an agrarian society lie in place..."

"Okay, okay, you can think about these things, and I'll do it. Although Kardashian has lost her identity as a dragon, she will not think about it from the position of ordinary people: "The Ministry of Agricultural Research has already achieved results, and we will start trying it in the spring-oh, tell me what other mines to be mined, make a list, and I'll arrange it." ”

"Well, I'll write a list of this later. ”

Roddy paused, and suddenly said, "Can you still remember the internal combustion engine?"

"The car has seen the profile of the four-cylinder engine, and the gas turbine only knows the principle, but the accuracy required by that thing is too high..."

There are many types of internal combustion engines, the most common is the piston car engine, but the application in ships and airplanes is the gas turbine... The principle is similar, but the structure is very different. Kardashian's head popped up with the information comparing the engine structure, and her eyes instantly lit up: "What do you mean... Do you want to do the internal combustion engine too?"

Roddy glanced left and right, raised his hand to cast a spell to close the gate and release the soundproof enchantment: "The high elf has something as powerful as the spar civilization, but it was destroyed by a simple-minded guy like the orc, I guess it's probably because the magic doesn't work at the critical moment... Even hedrons. ”

This speculation has actually been partially confirmed, Roddy now has no problem using hedron to fight the unification war, what if the enemy is replaced by a demon?

Of course, Kardashian also thought about these things, and now that Roddy said this, she narrowed her eyes even more: "That... Is it just about developing gas turbines and steam engines?"

"There are never too many ways to deal with the enemy. ”

Roddy turned off the projected map and replied in a low voice.

Kardashian didn't say anything when she heard this, but her eyes were inexplicably flashing with excitement.

That night, Roddy met again with Rahiman's envoy Misland, and after discussion, he said that "the kingdom of Karen will support your country as quickly as possible", and then signed an agreement on the debt that was originally borrowed - the most important of which was that the kingdom of Karen intervened in the war in the form of "mercenaries" in exchange for the terms of debt forgiveness.

The Rashman Council debated over the amount of debt forgiveness, as the "mercenary" battle had never been done in the mage-ruled Rashman Sea, and the ordinary mercenaries were not at all the same level as the elite of the Karen Kingdom, so the cost was always difficult to define - in the end, the agreement was to "successfully quell the war within one year" as the ultimate goal, and if fully achieved, the debt would be forgiven by sixty percent, the repayment period would be extended for two years, and the interest would be reduced.

In addition, all the harvest in the war, except for the resources in the territory of Rahman, went to the kingdom of Karen.

The agreement required that Roddy's army must arrive in Rahiman within four months, as wars usually require a conscription period, from the time the kingdom gathers its troops to the time they go to the port to arrive at Rahiman by boat, and three months before and after that.

Roddy agreed to the agreement after going back and forth with a few conditions, and he also understood that it was unrealistic to want to forgive all debts directly, even if he negotiated more conditions... First of all, the cost of employment is not so high, and secondly, there is a game at the political level.

And what the Karen Kingdom needs more now is something else - not to mention all kinds of resources and population, the "spoils" clause is the reason why Roddy is tempted.

From Houdini and Evely, he learned that the northern region of the Rashman Kingdom actually had many rich countries and lands. And as a mage council that overthrew the religious state, they have always adopted a policy of supporting small states against the Esca state... These countries were not drawn one by one, so if Roddy's army was strong enough, the spoils of war would definitely be indispensable.

When the agreement was signed, Roddy sent the relieved Ambassador Mislan away. He glanced at the dark night and stepped to the top of the magic tower.

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