Chapter 223: My Arithmetic Additional Volume
Emperor Uncle Zhu Zaiyu made something, is completely inconsistent with the product of this era, is a kind of exploration and innovation, combined with the application of past experience, how easy to use is not necessarily, that is, the degree of use, efficiency and later generations of steam turbines can not be compared, later generations of steam turbines used in large ships, power plants The thermal efficiency of the steam turbine can reach more than 60%, and the imperial uncle Zhu Zaiyu's turbine, I am afraid that even 5% is difficult to do, and it is extremely unstable.
Zhu Yijun can clearly explain the principles, such as high-pressure steam, safety valves, the principle of acceleration of steam by stator blades, high temperature, high pressure and high speed, after passing through the rotor blades, it becomes high temperature, high pressure and low speed, cooling and depressurizing in the stator blades, and the steam expansion is naturally increased through the speed of the blades.
But let Zhu Zaiyu fully understand the logic and then design it more scientifically, which is difficult for Uncle Huang.
But it is also a shocking miracle, because the reciprocating steam engine, played for more than 200 years, to the three-expansion steam engine, the thermal efficiency is only 8%, and the efficiency of this magical steam turbine is close to 5%, extremely terrifying.
When Watt improved the steam engine, it was not precisely calculated and designed, but an empirical practice.
Zhu Zaiyu's steam engine has a short working time and low service life, and the damage to the steam turbine is extremely fatal due to the steam at high temperature and high pressure, and the material science needs to make a breakthrough in order to adapt to high pressure and high temperature, and the fragile blades are easy to break down at high temperature and high pressure at 400 ° and 500 ° at every turn.
The next day, Zhu Yijun received a note from his uncle Zhu Zaiyu, a short-lived steam engine, how to increase his longevity? Zhu Zaiyu used a strange idea to reduce the weight of the safety valve on the high-pressure boiler, reduce the temperature and pressure, and reduce the pressure on the blades, reducing the high temperature above 400 degrees to less than 200 degrees.
Although efficiency is further sacrificed, the service life can be immediately extended to the point where it is sufficient for practical use.
"Uncle Huang is amazing." Zhu Yijun Zhu criticized Zhu Zaiyu's recital, which does not mean that Zhu Zaiyu gave up the exploration of high pressure and high temperature, but just put it into practice, combining theory with practice, and letting the steam engine be applied in practice.
The principle of a reciprocating steam engine is very simple, steam is fed, the piston is pushed, the piston drives the crank, and the crank drives the flywheel.
The reciprocating steam engine is to let the high-pressure steam input the cylinder from both ends, push the piston left and right, and realize the high-pressure steam entering the cylinder device left and right, which is a slide valve connected to the flywheel.
The slide valve is connected to the flywheel through the slide valve stem, the flywheel rotates, the slide valve moves left and right, and the steam enters the cylinder from the left and right sides.
The biggest technical difficulty is sealing, both the slide chamber and the cylinder have a connecting rod connection flywheel, while the slide chamber and the cylinder both need sealing technology.
Compared with steam turbines, the biggest problem of reciprocating steam engines is the difficulty of sealing, which requires the connecting rods to enter and exit, and the connecting rods to seal and prevent the steam from being depressurized, which is the technical problem that Zhu Yijun needs to overcome.
There must be a brave man under the heavy reward, and all kinds of ingenious ideas appeared on Zhu Zaiyu's desk, but any useful opinions will be adopted by Zhu Zaiyu, and a reward will be sent down, and the topic of firepower lifting water will begin to rise under the heavy reward.
The major miscellaneous newspapers in Beijing began to report on the heavy rewards of the imperial court, and looked for someone who could carry water with firepower.
If you can't burn coal, burn silver, this is Zhu Yijun's solution, burning silver is really useful, and Zhu soon had a harvest.
"Your Majesty, Mr. Motosuke said that it was ready, please go to Your Majesty." Feng Bao bowed his head and said, the venue of the experiment was in the Quanchu Hall, and Zhu Yijun, who was sorting out the agricultural books in the Baoqi Division, heard about it, closed the agricultural books, and stood up.
This device is derived from the "People's Daily", and it is not a steam engine, but it is also a water intake device.
Minbao, a miscellaneous newspaper that likes to report all kinds of things closely related to the people, reported a kind of artesian water device, which is not a perpetual motion machine that does not need to do work, but a simpler way to take water, and it is also in response to the call of the imperial court.
Zhu Yijun rushed to the Quanchu Hall, Zhang Ju was waiting in front of the door, and the threshold had been removed, under the leadership of You Qi, Zhu Yijun came to the pool of the Jiuzhi Bridge.
The device is very simple, a bellows and a tube, the air inlet of the bellows that was originally inhaled, connected to the tube, stretched into the artificial lake.
You Qi stood next to the bellows, and after getting Zhang Juzheng's approval, You Qi began to twitch the handle of the bellows.
"It's out of the water." Zhu Yijun watched the air outlet turn into a water pipe, and said to Zhang Juzheng with a smile.
You Qi chose to stop, but the water did not stop, it was still flowing out, and then the water flow became smaller, the water stopped flowing, and when You Qi pulled again, the water flowed out again.
At this time, Zhang Juzheng, the first assistant of the Ming Dynasty, was stunned, the willow tree next to the nine-fold bridge had sprouted, and under the blowing of the spring breeze, there were ripples on the surface of the lake, he had tried many times, this is not Taoism, it is the infinite principle of all things.
Quite simply, the gas in the tube is pumped out, so the water is sucked up, using atmospheric pressure.
Daming has a kind of wine drinking device, the long rod is hollow, and there is a hole at the top of the long rod, put the wine drinking device into the wine, press the air hole, you can lift the wine up, and then release the air hole, the wine will flow into the cup, and the atmospheric pressure is also used.
You Qi took the emperor and Shoufu to his own well, and stretched the pipe into the well, and the first well quickly pumped water, but the second well did not.
"The second mouth of water to the ground exceeds three zhang, but anything that exceeds three zhang cannot be pumped out." Zhang Juzheng said.
According to the common cognition of Da Ming and Taixi, the basic principle of natural aversion to vacuum, more than three zhang should be able to press out water, but, if it doesn't work, it won't work.
There is also a limit to the atmospheric pressure, which can only press the water to a height of about three feet.
The depth of three zhang is the limit distance of the water press, which is not to say that this device is useless, on the contrary, it is very useful and can greatly facilitate the life of the people.
Its application scenario can be used in a well below three zhang, which is a magical invention for the convenience of the people.
The bellows is slightly changed to a water press, coated with tung oil, which can be used for decades, and there is a leather cushion cover plate on the piston and water pipe inside, and the air can only flow from the bottom to the top, not from the top to the bottom.
"Where is the craftsman who invented it?" Zhu Yijun finished reading the real thing, nodded again and again, it is really an ingenious method of lifting water, although the height of Sanzhang is limited, but it can still be practically used.
Zhang Juzheng is like this, he is afraid that someone will deceive the saint, so he will try it himself, after all, during the Jiajing period, there was a fake Taoist priest who deceived the Taoist master, and was ordered by Ti Shuai Lu Bing, His Majesty is young Chong, if he is deceived, Zhang Juzheng, the emperor, is primarily responsible.
Zhang Juzheng found that this thing is useful and has limited application scenarios, but it is indeed very easy to use, and it can greatly facilitate the lives of ordinary people.
Zhu Yijun looked at the water press in front of him, and couldn't stop laughing, although this thing can't solve the problem of water lifting in the mine, the bottom layer of the mine is extremely complicated, and the water surface height is more than ten zhang, so he still has to build a steam engine.
But any good thing for the people is what Zhu Yijun needs to pay attention to.
Zhang Juzheng asked You Qi to bring the craftsman to His Majesty.
"The grass people greet Your Majesty, long live Your Majesty, long live, long live." Zhu Yijun looked at the person in front of him, it was a middle-aged man, according to the report of the People's Daily, this man was a carpenter from the outer city, named Liu Sandao, when the imperial court issued an order to find a plan to lift water with firepower, he moved his mind, since the bellows can pump wind, can it pump water?
This time, he really tried, but he didn't know who to talk about it, so he found the people's newspaper.
"Excuse me, excuse me, you haven't been able to solve the problem, you can't get the 500,000 taels, but I will give you a third-class merit medal, a thousand taels of silver, a bottle of national cellar, and a special worsted woollen horse, which is extra gracious." Zhu Yijun asked Feng Bao to take out his reward.
The third-class merit reward plate is made of copper, and the reward of 1,000 taels of silver is enough for Liu Sandao to change his class.
"The grass people thank the emperor." Liu Sandao was overjoyed, just a simple idea, he actually received such a reward, it was really an unexpected surprise for him, and he bragged to his son and grandson in the future, he Liu Sandao was also a person who had seen the emperor.
As long as Liu Sandao put the merit reward card at home, there was no wanderer in the city who dared to come to the door to disturb him, took the merit reward card, ran to the Shuntian Mansion Yamen, and said that he had made meritorious service to the Ming Dynasty, and the Shuntian Mansion Yamen had to be cautious, because this Liu Sandao had really seen the emperor.
Zhu Yijun chatted with Liu Sandao for a long time, and asked him about the situation at home, how many people, how old the children were, how they thought of absorbing water, how they found Minbao, etc., until Liu Sandao left, Zhu Yijun was still smiling, and said to Zhang Juzheng: "Who is the pen of Minbao?" ”
There is a key platform for speaking out, the People's Daily.
Zhu Yijun likes to read the people's newspaper very much, that is, it is closely related to the people, there are many interesting things in it, this people's newspaper does not have any partisan component, Zhu Yijun is very curious, who is running this newspaper.
Miscellaneous newspapers can be described as a mixture of fish and dragons, and each pen is publishing all kinds of strange editorials with their own thoughts, which can be described as a group of demons dancing wildly, and this people's newspaper has never been involved in government affairs, and it is specially published by picking interesting things.
When Liu Sandao found the Minbao, the Minbao was not greedy for merit, but reported the truth, which was commendable.
"Jiao Hong and his teacher Geng Xiang organized it." Zhang Juzheng bowed his head and said that miscellaneous reports are an important means of drumming up public opinion on the potential and wind, and Zhang Juzheng must pay careful attention to who is behind it, and it is already clear who is behind it.
And this people's newspaper was organized by Geng Xiangxiang and Jiao Hong.
"It's Jiao Hong, who offended Sun Jigao last time in Yanxing Building, and almost failed to sign up for the exam?" Zhu Yijun was deeply impressed by Jiao Hong, this student fought against Confucianism in Nanjing Chongzheng Academy, and when he arrived in Beijing, he intensified his efforts and directly scolded Sun Jigao.
Sun Jigao, the champion, is always being scolded.
"Exactly." Zhang Juzheng replied.
If you enter, you can't get home, and if you go out, you will be invincible to foreign patients, and the country will die, people will be like this, and the family will be like this, and the country will be like this, born in distress and die in peace, and Zhang Juzheng is very pleased to be able to see the people's newspaper, see Jiao Hong, and see the standards pursued by the people's newspaper.
It's really rare.
Sun Jigao, as the former champion, is very well-connected in Shilin, and Jiao Hong offended the abbot, so he must not be able to worship the Buddha.
But Jiao Hong is now under the door of the Quanchu Guild Hall, so naturally no one dares to embarrass too much.
"Sun Jigao didn't make a miscellaneous report?" Zhu Yijun asked curiously.
"That's it." Zhang Juzheng said indescribably, how could Sun Jigao, as the tomb faction in the retro school, not run miscellaneous newspapers?
"How's it going?" Zhu Yijun walked towards the Jiuzhi Bridge and asked Sun Jigao about his miscellaneous reports.
"The loss is beyond their means, and they announced the closure in December last year, and they closed their doors, and their retro theory is actually widely sought after in Shilin, but it is somewhat boring, and there are few people who buy it, and they only rely on their own people to support, which is a loss of money."
"It's about worsted wool." Zhang Juzheng explained the logic.
In fact, Sun Jigao's miscellaneous reports could have continued to be maintained, as long as Sun Jigao behind the powerful right kept giving money, but recently, the focus of the powerful right people looked at worsted wool, and this Sun Jigao naturally broke off the cooking, and there was no way to continue, so he could only stop.
"Dog food is out?" Zhu Yijun pondered for a moment and asked.
Zhang Juzheng said with a smile: "The dog food is broken." ”
The term dog food has appeared for the second time, the first time was when talking about Guozijian against arithmetic, Zhang Juzheng was no longer surprised by His Majesty's precise and interesting words.
"It's a shame he didn't fart, otherwise I would have taken his dog's head." Zhu Yijun flicked his sleeves, Daming has some bottom lines that cannot be touched, if Sun Jigao makes up a rhetoric similar to that of a Japanese coward who is also a human being, then Zhu Yijun can only clean up the moths by himself.
Zhang Juzheng looked at His Majesty's back, just shook his head, His Majesty is not joking, he can really make it.
He was a little distracted, thinking about what he would do after returning to politics.
His Majesty is already fifteen years old, and he will reach the age of pro-government next year, and he has already seriously considered retiring, but it seems that he cannot retire.
It's not that he wants to be regent, but the Ming Dynasty still needs him.
What will Your Majesty do when he comes to power?
There will be a big purge.
This is something that Zhang Juzheng can predict, His Majesty's determination to inspire Daming is far greater than he imagined!
His Majesty's slamming of the door is only aimed at extravagance, when it is time to make a move, 500,000 taels of silver will be rewarded to the craftsman to improve the process, when Zhu Zaiyu does not want it, the emperor chose to add money, the 500,000 bounty is still unchanged, and he chose to give it to Zhu Zaiyu, and 500,000 real money and silver still have to be smashed.
This is just a trivial matter, after His Majesty takes office, he will definitely launch a round of bloody purges against the retro faction who oppose the New Deal, especially the Tomb faction, there is no doubt that the result of anyone who obstructs the New Deal is death in the physical sense.
This is His Majesty's determination, Chen Youren, a person who is talking nonsense, slandering the Ming Jingying, slandering Qi Jiguang, the emperor chose to kill people with his own hands, this is the choice of the Ming Emperor.
Therefore, Zhang Juzheng can't retreat, if he retreats, the world will enter a high-pressure state.
Just like people who want to get a haircut and trim their nails, the huge and bloated personnel structure will inevitably selectively optimize some of them, but in the process of optimization, you can't cut off your feet, cut your hands with a pain in your hands, or cut off your head with a pain in your head.
Tan Lun's radicalism is like cutting off his head with a sore head, and His Majesty's radicalism can easily turn into a situation where his hands hurt and cut off his hands because of the development of the situation.
Once some things start, they will not be controlled by anyone at all, not even the emperor, and finally cause a monstrous disaster that affects the entire Ming Dynasty.
Zhang Juzheng is very melancholy, and his beautiful retirement life is gradually drifting away.
Zhu Yijun had another meal at the emperor's house, and talked in detail about the examination, the triennial imperial examination of the Ming Dynasty is about to be admitted to the hospital, this is the selection of talents.
"Sir, do you want to add an additional paper on arithmetic, whether the test is good or bad, it will not affect the title of the gold list, it can be regarded as a try." Zhu Yijun said tentatively, the quality of arithmetic can judge a person's logical thinking, Zhu Yijun plans to find a little capable person to come out, farming, coal mining, clearing, returning land, tax and so on all need arithmetic talents.
"The minister thinks it is good." Zhang Juzheng shook from his sleeve and shook out an exam paper for arithmetic, he was actually hesitating, but since His Majesty said it, it would be good to add it directly to the exam.
There are a total of 12 questions, 60 points, 5 points for one question, and points are given according to the steps.
The additional volume does not affect the title of the gold list, but it affects the image of this student in the emperor's mind, the emperor's side eyes and weight, for a courtier, it is a long step to the sky.
For the Jinshi, the imperial examination is not the end, but the beginning.
Zhu Yijun asked Zhang Hong to take a set of additional rolls and said with a smile: "I also have a set, sir, take a look?" ”
Zhu Yijun is reviewing Zhang Juzheng's test papers, and Zhang Juzheng is reading the emperor's test papers.
"Your Majesty, this is too difficult." After reading a few questions, Zhang Juzheng immediately gasped and relieved the climate of Daming's Xiaoice River, the emperor is too radical, His Majesty's set of papers, appeared in the examination room, even if it is not four thousand people, three thousand five hundred people have zero points.
"Isn't that simple?" Zhu Yijun said with great conviction: "It is the level of the Bypass Hall, at most there are two questions that are at the level of the Mingli Hall, why is it difficult?" ”
"Sir, this set of questions is too simple, I can do it as a child, and use it to test people, isn't this a cold lifting of people who don't read arithmetic?"
Zhang Juzheng understood, His Majesty fully knew the difficulty of his own test papers, just to embarrass people, His Majesty's skill in humiliating people, Zhang Juzheng recognized it very much, and in the future, the history of the future will be judged, Wanli five years of this subject, most of the students, zero points in the arithmetic test, I am afraid that they will be laughed at for thousands of years.
"I think I'll use this set." Zhu Yijun looked at Zhang Juzheng's expression, and knew that Mr. Zhang had already understood his purpose, so he didn't hide it, but he made it clear that he wanted to humiliate the lowly Confucian, didn't he want to disobey the imperial court's decree and refuse to learn arithmetic? Either don't participate in the imperial examination, don't have ambition for power, or obey the imperial decree and implement it conscientiously.
This is Zhu Yijun's purpose.
"Your Majesty." Zhang Juzheng chose to agree, it doesn't matter if the difficulty of the exam is, he can screen out a group of courtiers who follow the imperial decrees, and because it does not affect the title of the gold list, even students with poor educational resources who can only learn the Four Books and Five Classics can have a relatively fair examination environment.
Zhu Yijun left the Quanchu Hall with a full meal and a satisfied heart, and continued to tinker with his reciprocating steam engine.
Before the test, Zhu Yijun came up with a strange machine, a hot gas engine, or a Stirling engine.
It has a total of two cylinders, one is a hot chamber and the other end is a cold chamber.
Zhu Yijun lit the oil lamp, the hot chamber began to heat, the air in the hot chamber expanded to push the piston, the piston pushed the connecting rod to rotate, when the connecting rod rotated, the cold cavity piston was driven to compress, the cooled air was pushed into the hot chamber, and so on.
The structure of this thing is extremely simple, and the cold chamber is soaked in water for water cooling.
When the temperature difference between the hot cavity and the cold cavity is higher, the faster the speed, the war bureau also specially uses a hollow design, the cylinder at the cold end is irregular, cast by the lost wax method, there are many holes in it, water can enter and exit, specially used to cool the temperature of the cold cavity.
The heater spins, and it spins fast, but it's still not practical, it's just a toy.
If you want the application of the heat turbine in the engineering field, it is better to wait for the steam turbine engineering application invented by Zhu Zaiyu, although Zhu Zaiyu's steam turbine has various shortcomings, but it is much better than the heat turbine made by Zhu Yijun.
The sealing requirements of the hot gas engine are much higher than those of the reciprocating steam engine and steam turbine, otherwise the gas responsible for the workmanship will be gradually lost in the heating process and finally shut down.
Sealing and lubrication are a pair of contradictions, emphasizing sealing, you can't emphasize lubrication, emphasizing lubrication, you can emphasize sealing, and the hot gas engine should emphasize both sealing and lubrication, which makes it difficult to apply the hot gas engine.
Zhu Yijun extinguished the oil lamp and continued to study his reciprocating steam engine.
Zhu Yijun tinkered with the reciprocating steam engine, while Wang Qian, Zhang Siwen, Jiao Hong, Gu Xiancheng and others came to the gate of the Gongyuan and entered the Gongyuan to prepare for the exam, they were full of confidence.
In addition to the joy of the New Year, the students who entered Beijing to catch the exam have come to Beijing one after another to participate in the examination of the fifth year of Wanli.
The five directions of the capital are gathered, and each of its townships has a guild hall.
In addition to the large households that have houses in Beijing, the students who enter Beijing to take the exam will live in the hall, because during this time, the price of the inn will rise sharply, and the imperial court does not have an official house, and the township businessmen began to prepare for the construction of various halls, and the whole Chu, Jin, and Zhejiang halls came into being in this way, and it became a matter of course for the villagers to form a party based on the region.
It is very busy to move people into Beijing, to visit relatives and friends, to submit famous posts to visit celebrities, to participate in various poetry meetings, if it is Chinese, it is a classmate, if it is under the same teacher, it is the same teacher, this is an unavoidable human exchange.
Some people lifted, and even took the letters of local teachers, and found the celebrity Yashi in the court to serve, this kind of investment is beneficial to each other, the celebrity Yashi envelops the party, and this lifter, under the guidance of the celebrity Yashi, it is easier to be named on the gold list.
On the seventh day of the first month of February, the Ming Emperor decreed the appointment of the chief examiner, and this year's president is Lu Tiaoyang and Shen Shixing, and the appointment of eighteen examiners with the examiner, these eighteen with the examiner is the person who marks the papers, if it can be cast into the name of the examiner, then there will be a little advantage.
This advantage is the wind public opinion of the examiners, for example, most of the same examiners this year are Jinshi in Longqing for five years, they are all Zhang Juzheng's disciples, if on the test paper, the positive role of the power of the discussion is very colorful, it is easy to be deposed, but grasp the wind public opinion, you will grasp the wind direction of the exam.
On the eighth day of the second month, he began to enter the tribute court, and on the morning of the ninth day of the second month, the first test was held, with three four books and four five scriptures;
On the day of February 12, the second examination is a discussion of the interpretation and discussion of the topic; The edict imitates the words and deeds of the superiors, and writes the corresponding Han edicts, Tang edicts, and Song tables, judgments, official documents submitted to subordinates, and criticisms;
On February 15th, it was the third test, which was to do reading comprehension for a piece of material.
The first one is the most important, a total of seven articles to be written, all written in eight-strand text, the thief is difficult to understand, the reason why it is difficult to understand is that there is no logic, some words and sentences, it is difficult to accurately grasp its meaning, in the words of the Ming students, this thing is empty and useless, it has nothing to do with political affairs, and it is useless at all.
Before the Chenghua period, the imperial examination of the Ming Dynasty did not use the eight-strand text, if you look at the scrolls of the champions of the past dynasties, you will find that the champions in the early years of the Ming Dynasty, the articles written were not so obscure, and after the Chenghua period, the eight-strand text became the formula.
Wang Qian, Zhang Siwen, Jiao Hong, Gu Xiancheng and others submitted the questionnaire, thinking that they had finished the exam, but they sent out another paper.
"It's arithmetic!" Gu Xiancheng looked at the roll, and he was dizzy.
Everyone was speculating that arithmetic would definitely join the imperial examination, but they didn't expect that Wanli would open the examination directly without any notice in the fifth year.
Gu Xiancheng only felt dizzy, his arithmetic was extremely poor, if he took the arithmetic test, he would definitely fail the list, when he looked at the arithmetic test paper in frustration, the words on it rekindled Gu Xiancheng's hope.
Additional arithmetic papers will be published after the examination of the taxi.
This means that the non-answering of the arithmetic paper will not affect the number of Jinshi in this year's imperial examination, which makes Gu Xiancheng rekindle his hope, and when he began to answer the questions with great interest, he realized that these test questions are terrible.
One won't.
The three arithmetic classrooms of the degree hall, the bypass hall, the Mingli hall, and the Guozijian are the three-level teaching schools established under the national policy of degree bypass.
Gu Xiancheng has not studied arithmetic, so he will be strange, he wrote a round of nonsense, and handed over the matter in a hurry.
Zhang Siwen and Jiao Hong are good friends, both of them are very keen on arithmetic, discussing the solution of the last two problems, and Wang Qian is full of smiles, thanks to not listening to his father, he bought a textbook from Huangzhuang and studied arithmetic, otherwise this time, I am afraid it will be embarrassing.
It is true that the additional volume does not affect the jinshi, but the additional volume affects the emperor's attitude towards this student.
How many Jinshi can only meet the emperor once in the palace test in their lives, if this emperor is lazy, he will not even see the emperor for the rest of his life, such a critical moment of the sacred heart, Wang Qian is very glad that his arithmetic is not bad.
Gu Xiancheng wanted to say hello to Wang Qian, but Wang Qian didn't look at Gu Xiancheng at all, so he directly got into his car and left the tribute courtyard.
Wang Qian opened the car window, and when he watched Zhang Siwen and Jiao Hongmei dance to discuss the exam, he sighed heavily and closed the window.
He is very envious of the friendship between Zhang Siwen and Jiao Hong, Zhang Siwen does not plan to enter politics, he wants to enter the Royal Gewu Academy after being admitted to the Shi, and Jiao Hong wants to go to the Gou Ji Institute.
Wang Qian knew that he was a worldly red man, so he didn't join in the fun.
It is not difficult for the hot gas engine or Stirling engine to rotate, but it is difficult to control the speed and power, etc., boiling water, is the chemical energy into heat energy, the medium is water, and the medium of the hot gas engine is gas, which is also converted into heat energy. Asking for a monthly pass, woo!!!!!
(End of chapter)