"You, put these two pieces of iron together," said the black dragon. Under his huge body, there were a group of silent spell casters and red lotus goblins.


    The caster nodded and held the two iron plates. The flame spewed out between his fingers, and the interface melted at a speed visible to the naked eye.


    "In this way, reduce the magic and do it again."


    The caster did so, and the two iron plates were spliced at 90 degrees and firmly welded together.


    This is not difficult. Any caster with a certain level can do it, even Caesar himself. This psychic black dragon has the ability to distort matter by will.


    Caesar glanced at the interface. Longan''s fine vision enabled him to clearly see the changes at the interface - a perfect weld without defects suddenly appeared. If you polish it a little, you can polish the traces of metal fluid during iron melting. The two iron plates are almost the same as a forged body formed at one time.


    In the field of welding, it is very difficult to achieve a smooth and seamless weld, but it can be easily solved by relying on supernatural forces.


    "Well done." the black dragon emperor did not mean his praise: "next, weld the other two iron plates."


    "What is this?"


    Luna came out of his head and asked, "a metal bucket?"


    "No, it''s a cylinder," Caesar corrected.


    "Cylinder?" Luna repeated in confusion, looking at the welded barrel, which is just the size for her to take a bath.


    "You can understand it as a part of the magic core."


    Caesar said, his eyes turned to another square iron plate: "see the small hole above? Air will enter the cylinder from here and push the piston. Well - the piston is an iron plate slightly smaller than the inner diameter of the cylinder, which can move freely."


    "Caesar, you have coined new words."


    Even though she is used to it, Luna is still a little dizzy. At this time, let a master who studies magic guide listen to the explanation of black dragon. It''s almost difficult for the little guy to understand: "can''t you directly tell me what this thing is used for? Is it also an explosive weapon?"


    "No, it''s a production machine."


    The steam engine, the earth''s most iconic invention, brought the driving force needed for the earth''s first industrial revolution. After that, the earth civilization improved productivity with an almost leap attitude and liberated human and animal power.


    The inspiration for making steam engines came from the red lotus goblins. A considerable number of timid guys were not interested in weapon research and development and did not dare to continue their research on gunpowder. On the contrary, they were curious about the pot cover that kept jumping when boiling water. They secretly touched and studied it. As a result, they came up with the frying pan incident, which alerted the Black Dragon Emperor.


    Caesar was ready to shock the world and get the steam engine out first.


    Its principle is not complicated. In short, it is an enlarged kettle. The boiled steam is introduced into the cylinder, which then pushes the piston and connecting rod to convert the heat energy into mechanical energy and output it outward.


    The principle is simple, but it does not mean that it is easy to manufacture. The difficulty of this mechanical part lies in the tightness of the cylinder and piston and the selection of the material of the transmission pipe. Before the metal processing level has reached a certain level, it is impossible to create a perfect cylinder. The red lotus goblins die on it - they just don''t realize the problem.


    It is not easy for the steam engine to be really launched. On the earth where Caesar is located, it came into being at the right time after the civilization has developed to a certain extent and has sufficient technical reserves.


    But in a world that can weld and rub cylinders by hand, manufacturing problems can be easily bypassed and solved.


    Caesar only needs to design four iron plates of the same size in advance, give the design drawings, then let the goblin factory cast and polished, and then fix the shape through magic welding to get the formed cylinder.


    However, this does not mean that everything is all right. There are still problems to be solved. The square cylinder can not solve the problem of stress stability - the force in the cylinder is concentrated at the four corners. When the piston acts at high speed, even without considering the vibration of the machinery itself, only high temperature and high pressure can break the weld and maintain air tightness.


    Under normal circumstances, you can only change the design or choose higher strength materials to solve this problem.


    It is impossible to change the design. It is impossible to change it in this life. Caesar has only this thing in his mind. He can''t take out any more.


    Higher strength alloy materials depend on the development of physics and chemistry. Other countries in ayladia and the black wing Empire do not follow the same path. This material can not be imported. The Empire needs money and time to accumulate the database, and the manufacturing can be completed only after a large number of matching tests in the laboratory are successful.


    Without the help of these supernatural forces, Caesar might have to wait a little 100 years, but now, Caesar can let the casters use magic blessing to improve strength and maintain stability, and make the steam engine at this stage similar to the enchanted creation.


    Of course, this does not mean that the steam engine always needs to rely on supernatural forces, just as toddlers need a walker. After the baby grows up and the scientific level of the Empire gradually keeps up, the steam engine can get rid of this constraint and can be built and run normally even without a caster.


    So several spellcasters, a group of red lotus goblins and their subordinate institutions played with the Black Dragon Emperor for two days, and finally worked out the steam engine at the Arsenal camp.


    In fact, there is a tool to replace the steam engine in ayladia, which is named "magic energy core" by scholars. When needed, it converts the stored magic into power output. Its performance is consistent with the properties of the steam engine, and it is more efficient and portable.


    However, due to the high cost and difficult production, all these things are used by the ruling class. It is impossible to produce them wantonly.


    "Your Majesty, that''s what you said..."


    Half Lich Ryan looked at the strange machine with doubts. It looked like a sealed furnace, full of all kinds of iron bumps assembled in pieces. It looked a little deformed. Although it had been blessed by magic, it was some simple stability control magic.


    How does it move without a magic core? Can the emperor give it life? And this thing looks very clumsy. Do you have hands, feet, wings, and in what way do you want to move?


    "Hum."


    However, in Caesar''s eyes full of superiority, this seemingly simple machine exudes an alternative beauty, which is not only the taste of industry and the fragrance of capital, but also a harbinger of the rise of the black wing empire. This country is destined to embark on another road.


    He asked the goblins to pour two buckets of water into the steam chamber, and then lit the firewood below.


    Soon the water was boiled, gurgling and rolling, and a crackling sound gradually sounded in the cylinder. It was the sound of thermal expansion of the cylinder body. The piston was relatively thin, and the expansion deformation caused by heating was greater than that of the cylinder body, which would eventually firmly against the cylinder wall.


    The hesitation of different casters, after seeing this scene, the eyes of the red lotus goblins burst out a shining light, which was the scene of their experiment at that time. These little guys hurried forward and tried to get closer and observe carefully.


    When the cylinder is filled with steam, the door of the new world opens, and the piston starts to push the connecting rod outward. When the movement reaches the peak, another connecting rod pulls the sliding valve, and the steam pushes the piston inward. The two connecting rods move back and forth quickly, and the added roller rotates at a high speed. With the increase of fire power, the speed reaches the peak soon.


    The machine emits a sharp whistling sound, the exhaust port is wheezing and spraying white fog, which has a shocking momentum.


    "What power is this...?"


    Ryan asked blankly. As a semi Lich who specializes in magic, even if he saw it with his own eyes, he still didn''t understand the reason driving the "iron furnace" to move.