Dussaint and Lorraine agreed on an investment. This made Polina curled up on the couch very excited.

Obtaining funding from the nobles was originally one of her important purposes for coming to Newsar.

Although he did not receive funding from other nobles, he ...... Dussand's offer of funding really appealed to her.

Five hundred gold pounds! That's enough to build at least 20 gas engines on her own – and that's the cost of using a single piece of high-quality metal for all the parts, and then making them by hand with lathes, milling machines, and quenching furnaces.

If you can get this investment and find a qualified foundry in the local area to open the mold and pre-cast the parts...... Maybe the cost of a gas machine can be reduced to less than 10 gold pounds.

Compared to a steam horse, which needs at least 25 gold pounds, the competitive advantage of a gas engine is enormous.

But...... It's not that simple.

Polina interrupted Dusand and Lorraine's somewhat excited discussion and interjected, "Lord Dusander, there are some things I must tell you in advance. ”

She took a deep breath, then honestly revealed the biggest problem with the internal combustion engine, "If it was in Olin, you would definitely be right to invest in my invention." But this is Newsar, a highland planet equivalent to two thousand four hundred yols above sea level. If the gas engine is to be promoted, you can't hang a kettle with bleach liquid in front of the air inlet of each gas engine, and put a few pieces of burning coal underneath, right? ”

"Even if I could get the gas engine running this way, I would have to redesign and improve the internal materials of the gas engine." Polina looked embarrassed, "If you want to re-select special steel to prevent melting problems during internal combustion, it may take a long time to solve this problem. The cost can also be significant. ”

This is a very real problem, and Polina must clearly point out the risks that may arise in the investment process. Of course, she could have taken this opportunity to collect the investment money and then save all of her tutor's salary.

This way, after a year, she will be able to flee directly to other planets with at least forty gold pounds. Or a little more black-hearted, and disappear with five hundred and forty gold pounds.

But...... The consequence of this was that her invention completely lost the opportunity to continue to develop. And she will inevitably be wanted by the Empire, and she will live in constant anxiety.

Polina didn't want to see that happen. She prefers to work her own and then invest the money she has saved into improving the gas engine.

A salary of one gold pound a week was enough for her to build at least one more gas machine.

There is no need to take risks.

Dussander had already prepared a solution to this problem, but he really didn't expect that Polina would explain it specifically after he made an investment proposal.

"I appreciate your honesty." Dussaint nodded with a smile, then said, "However, this problem is not very difficult to solve. ”

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Turning over and getting out of bed like a carp from the bed, Dussander was full of energy today.

After three years of struggle, he finally got the privilege of getting dressed and washing himself when he got up in the morning. As long as there is no ball, he will be able to decide what he wears every day, which is already the maximum "freedom" he can get.

And this "freedom" may be gradually deepened from today, which makes Dussaint full of expectations for the future.

"Good morning, dear." In the dining room, my mother was eating breakfast in her ordinary home clothes. After seeing the disheveled Dusander's hair appear in the restaurant, she first got up and smoothed her son's hairstyle, as if he had been at the scene of the explosion, before saying, "You woke up early today." ”

"Ms. Polina is coming to teach me today, right?" Dussand couldn't hide his excitement, he sat down in his seat, then grabbed the bread next to him and stuffed it into his mouth, "I can't wait!" ”

"I'm afraid Lady Polina won't come to teach you so soon, my dear." Baroness Andronie said with a smile, "Yesterday's show was so successful that she drank almost half a bottle of Bordeaux wine at the ball. Hangovers and hangovers don't come easily with headaches. ”

After quickly settling his breakfast, Dussander began to move around the courtyard of the manor. Just had a full meal, strenuous exercise is not to be considered. Dussand, like the old man he had seen in the park in his previous life, shook his hands on both sides and began to walk along the white stone-paved horseback riding path.

In order to protect the hoof armor of the precious horses, the stones specially transported from Orin had to be pre-polished – not too sharp, but not too sleek.

After digging a hole about a quarter of a year deep in the middle of the lawn, the bottom was covered with charcoal and covered with polished white stones. This is a horseback riding trail suitable for horses to run.

After walking on the horseback trail for a long time, feeling completely warm and sweating a little on his head, Dussander saw Lorraine sitting in the side saddle at the corner of the horseback trail.

"Good day, Lady Lorraine." Dussaint waved his hand at Lorraine very happily, "You came early today. ”

"Today is the first day of Polina's class." Holding a thick hardcover notebook, Lorraine reined in her little white horse and gently wiped the sweat from the corners of her forehead, "I have never been exposed to mechanical design-related courses, so I decided to come over early to preview." ”

"Then you might be disappointed." Dusander, who was flushed with both hands, rubbed his wrist and said, "I heard from my mother before—last night after we left, Teacher Polina drank a lot of wine. I probably won't be able to come to class at the scheduled time. ”

Lorraine glanced at Dussand, who was rubbing her wrists, and asked, "Have you been to see Miss Polina?" ”

"Not yet." Dussaint shook his head, "Disturbing a lady with a hangover is not the behavior of a gentleman. ”

Lorraine chuckled lightly, "Then you may have been wrong in your judgment - the Baroness wasn't in the lounge last night and didn't see Miss Polina's expression, and you......" Her smile grew stronger, "You don't understand women." ”

After learning that Dussander had a way to solve the problem of gas engine starting, the excitement in Porina's eyes was like that of a noble lady seeing a huge diamond at a good price.

They would never give up their plans to take a steam wagon to the big purchase the next morning because of a hangover the day before.

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The class, which was scheduled to start at eight in the morning, ended up being slightly delayed by a quarter of an hour.

"I'm curious what the solution you said last night was." Polina's hair is meticulous, but the dark circles on her face and the occasional wrinkle between her eyebrows suggest that she is suffering from a hangover. "I've thought about it for a long time, but I still can't figure it out."

"You may be able to finish this warm glass of water before I answer." Dussander didn't answer the question directly, he just insisted on asking Polina to drink more hot water. "It's a great way to relieve headaches from hangovers."

Post-hangover headaches are caused by the diuretic effect of ethanol leading to a lack of water in the brain. The shrunken brain floats in the cerebrospinal fluid and is more likely to float and collide with the skull than it normally would. That's why there is a "headache" caused by this change in position.

And the solution to this headache is also simple - drink plenty of hot water.

Polina reluctantly began to pour hot water with a cup, and Dussander began to explain his thoughts with satisfaction after seeing that the other party drank most of the glass of water.

"From the looks of it, your invention itself is compression-ignition ignition." Starting from the appearance of the gas engine, Dussaint began to reason, "The compression ignition temperature of the gas itself is relatively high, and the compression ignition of the gas is difficult at the equivalent altitude and the temperature is lower than that of Orin. ”

Polina put down the clean glass of water and said to Dussand, "So...... Was the contingency you used at the beginning to increase the oxygen supply? ”

"This solves the problem of equivalent higher altitudes, but this approach can only be used as a temporary solution." Dussaint nodded and said, "To solve the start-up difficulty, we can start from two angles - make compression ignition easier, or increase the air intake. ”

It's not really difficult to find these two angles, but to solve them...... But it's very troublesome.

Polina frowned and asked, "Is there a specific plan?" ”

"To make compression ignition easier, I have two solutions." "Heat the fuel pipes to make the gas hot before it enters the cylinders, or spray ether into the cylinders in advance. Both of these solutions should be able to solve the problem of difficulty in starting the gas engine relatively easily. ”

The key to the compression combustion process is that the mixture of fuel and air is rapidly heated to the ignition point and burned under high pressure. Of course, electric ignition can be relatively easy to achieve this process, but high-voltage electric ignition requires relevant knowledge...... Dussaint himself does not possess it. At the same time, the Empire does not seem to have conducted any research on it.

Well, it is only possible to go up and down the fuel temperature.

Pre-heating of the gas is a good way to lower the threshold of compression ignition, and the same is true for pre-injection of ether.

The compression ignition temperature of ether is very low, and the ignition point is much lower than that of coal gas under high pressure in the cylinder. In other words, it can be burned in advance, then the gas is combusted, and the subsequent combustion operation is possible.

Polina's invention was not only epoch-making, it was also a very advanced mode of internal combustion engine. The engine had four cylinders and was designed to be a four-stroke from the ground up – compared to a single-cylinder, two-stroke machine, it was able to skip the spark plug technology that had not yet been available and put the combustion engine into use.

Polina looked at her student in shock, and after a long time she whispered, "...... before you Ever seen a similar machine? ”

"Nope." Dussaint smiled brightly, "However, a lot of knowledge is universal, and as long as you understand the principle, it is not difficult to make some improvements." I'm shocked that you've come up with such a masterpiece – the machine is so mature that it's ready for use almost immediately. ”

Two internal combustion engine enthusiasts, one big and one small, exchanged their interests with their eyes shining, while Lorraine, who was holding a quill dipped in water and preparing to record the content of the class, was a little overwhelmed.

The content of the communication between his fiancé and the teacher...... She couldn't understand a word.