"Dual-drive engine?"
If it was an engineer who uttered this sentence, the others in the room would not be amazed; however, it was Fire Dragon Hermit who uttered it. That was...
Looking at Zhang Tie's tower-like figure, which was like a violent machine from far-ancient times, and his bald head, which was full of killing intent and almost had the words "I'm the boss" written on it, the five people in the room widely opened their mouths.
"Did... did... hermit... invent this?"
The oldest old man in the room watched Zhang Tie with a dumbfounded look as he asked out of amazement.
"What? Don't I look like a cultured person? Should knights be simple-minded and well-developed?" Zhang Tie glared at him, causing the old man to feel a mountain-like stress. He was so scared that he almost peed his pants.
"No … no … I mean … I mean … the Enlightened One …"
The old man was so nervous that he was tongue-tied. The more nervous he was, the more incoherent his speech was. The more incoherent his speech was, the more nervous he was. In just a few seconds, the old man's forehead was covered with soybean-sized beads of sweat.
"Hermit, please forgive me. I think Clan Head Yan means that the one who could invent and design this machine is definitely a top expert in this aspect. Although there are such knights in Taixia Country, we've not seen them. Therefore, when we saw your drawing, we all admired and shocked you. I've not imagined that you're a talent in both literature and martial arts. You're even proficient in mechanical design. That's really amazing!"
At this moment, it was Sun Qiming who helped the old man.
After hearing that Sun Qiming helped him, the old man who was very jealous of Sun Qiming just now threw a grateful glance at Sun Qiming. As he wiped off the cold sweat on his forehead, he hurriedly nodded, "Yes, yes, that's what I mean, that's what I mean. Hermit's ability... is really admirable!"
Actually, since they entered the room, they had been in a competitive relationship. Even so, Sun Qiming was still willing to help others when they were in trouble. From this point, it could be seen that Sun Qiming was kind-hearted and tolerant. Therefore, Zhang Tie thought highly of Sun Qiming and felt that Lv Shasha, his junior sister apprentice, was a reliable man and a good match for him.
"Well, it's good that you don't mean that!" Zhang Tie nodded as he threw a glance at Sun Qiming, "Before promoting to a knight, I was already very interested in dynamic system. After promoting to a knight, due to my powerful spiritual energy, I could almost read 10 lines at a glance. After learning many predecessors' experiences and knowledge, I made a great breakthrough in this aspect..."
Actually, due to the long lifespan and powerful spiritual energy of knights, knights always stood on the top of all aspects in Taixia Country, even those fields which were not related to battle such as music, art, painting, etc. However, these knights didn't become famous because of this.
It was not strange for a knight to show a very high achievement in the field of machinery manufacturing. If a knight was really interested in this field and could persist for 100 years, he or she would become a top expert. However, nobody at present could guess Zhang Tie's real age.
Of course, Zhang Tie's invention was too amazing for them at present.
"We're stupid. Hermit, please solve the mystery of this machine for us …" Sun Qiming bowed deeply towards Zhang Tie.
"Fine, I'll tell you what's so special about this machine!" Zhang Tie said as he turned solemn and started to explain it to them by pointing at the drawing.
This dual-drive engine was very important for Zhang Tie. As these people at present were selected by Zhang Tie to make this machine, if they couldn't figure out the design thinking and some key technical principles of this machine, they might have some problems in the future. Therefore, it was necessary for Zhang Tie to explain it to them so that they could figure it out.
"Just now, somebody said that this machine is both an internal combustion engine and an external combustion engine. They are quite right. This machine is indeed both an internal combustion engine and an external combustion engine because this machine boasts the design essence of both the external combustion engine and the internal combustion engine!" Zhang Tie said as he pointed at the cylinder on the drawing, "The essence of this design lies in the cylinder of this machine …"
"Before the Catastrophe, the traditional internal combustion engine would generate a lot of heat when it was burning. As a result, the entire engine would be in a very high temperature. When the temperature of the engine was too high, the operation of the engine would be affected. Therefore, the engines before the Catastrophe had to be equipped with various water-cooling systems or air-cooling systems to cool down the engine. After being ignited and running for a few minutes, the water temperature in the water tank would rise rapidly and even boil. It was normal for people before the Catastrophe!"
"According to some documents I've read about engines before the catastrophe, during a certain period of time before the catastrophe, drivers of low-powered tractors with only the horsepower of a technician would always carry three items with them. The first item was the crank of the engine, which was used to start the tractor. The second item was a large water tank, which was used to replenish the water cooling system of the tractor at any time, in case the engine was not cooled down in time. The third item was eggs. When the drivers were hungry, they would throw the eggs into the water cooling system, and they would be cooked in an instant. The water cooling system was like boiling water at any time …"
"As for people in this age, when steam and heat energy have become our main power sources, it's a joke and a great waste to specially equip the engine with a cooling system. Take the common gasoline engine before the Catastrophe as an example, the output power of most of the gasoline engines only accounted for 20% to 30% of the total heat of the combustion of the fuel. Diesel engines could reach 30% to 45%. A common gasoline engine's heat dissipated and discharged in the form of residual heat accounted for 70% to 80% of the total heat of the combustion of the cylinder. Additionally, 70% to 80% of the total heat of the combustion was wasted. What a joke! Most of the internal combustion engines before the Catastrophe had the defect of wasting the heat of the combustion of the fuel at the beginning of their design. Traditional internal combustion engines couldn't make the best use of the energy of the combustion of the fuel …"
"The dual-drive engine that I've invented could make up for this shortcoming of traditional internal combustion engines as much as possible. Meanwhile, it combines the water-cooling system of traditional internal combustion engines with the steam power system that we're using now. The key point of this combination is the cylinder of traditional internal combustion engines …"
"… When the fuel mixed with air and burned in the cylinder, the reciprocating pistons in the cylinder would start to move and push the crank connecting rod to make a stroke. From this perspective, it's an internal combustion engine. Additionally, look, the cylinder of this engine is different than that of common reciprocating piston engines before the Catastrophe. The driving force caused by the expansion of the fuel in the cylinder would be transferred to the pistons in the cylinder and push the crank connecting rod to make a mechanical movement. By contrast, when the fuel is burned in the cylinder, it would bring more heat to heat the water cooling layer outside the cylinder wall through the cylinder wall. From the latter point of view, the combustion of the cylinder becomes the driving force of the external combustion engine …"
"The core of this dual-drive engine is the cylinder. Compared to the cylinder of traditional internal combustion engines, it has some remarkable differences in four aspects, namely, the layout of the cylinder; the selection of the material of the cylinder body; the cooling system of the cylinder; the design of the hollow layer outside the cylinder wall …"
The moment Zhang Tie started to talk about it, he had been immersed in his role very professionally. In a split second, the audience even forgot that Zhang Tie was an earth knight as they started to listen to Zhang Tie's introduction attentively. Gradually, they were all attracted by Zhang Tie's introduction.
…
"… being different than the material of the cylinder body of common internal combustion engines, the material of the cylinder body of this engine has to have a very high thermal conductivity in order to smoothly transfer heat energy from the combustion chamber to the water-cooling layer on its side. Therefore, according to the Fourier Metal Thermal Conductivity Law, the best material of the cylinder body is super-dense double-hard LV 3 aluminum alloy. This aluminum alloy should undergo a four-phase hot-dip coating on the water-cooling layer. This process is consistent with the hot-dip coating process of the water-cooling layer of internal combustion engines used by many premium sedans of Faerie Dragon …"
"As the exhaust pipe of internal combustion engines would also carry away a lot of heat, the layout of the exhaust pipe of this engine is a bit special. It adopts the design idea of circular and embedded. In this way, after the engine is started, the high-heat exhaust gas in the exhaust pipe could heat the steam in the steam power system for the second time …"
"Therefore, the combustion of the fuel in the cylinder of this engine means that the piston inside the cylinder and the steam power outside the cylinder are working at the same time. Its working efficiency is unrivaled. Its cylinder displacement is 18.5 liters. In general, its cylinder power density is … and its cylinder compression ratio is …"
"Through the enhancement of two-stage turbocharger, the output power of the internal combustion engine alone could reach 940 horsepower. The steam power driven by the external combustion engine alone could reach 610 horsepower. The two different output powers could be used separately. One could be used as the driving system; the other could be connected to the steam weapon module. Additionally, a differential transmission gearbox could be used to unify the two powers into the same output direction so as to maximize the output in different situations and time periods. If it's not connected to the steam weapon module, the weight of the entire engine could be controlled within 800 kg due to the surpassing metal smelting and processing level before the Catastrophe …"
As this engine embodied a dream of Zhang Tie, Zhang Tie explained it very meticulously.
When he was explaining this engine, Zhang Tie's heart had long flown to the Selnes Theater of Operations which was covered with smoke and blood …
The former Selnes Theater of Operations left Zhang Tie too many memories and too much blood.
This engine was specially designed by Zhang Tie for the first propeller plane in Black Iron Age...
When he explained the design principle of this engine, Zhang Tie had a hypothesis — — if there was such an engine in Selnes Theater of Operations and propeller airplanes driven by such an engine, what would be the result of the Selnes Theater of Operations? Would the airship troop in Selnes Theater of Operations have a better result?
Undoubtedly, if there was such an engine at that time and airplanes could be manufactured with such an engine, the result of the entire Selnes Theater of Operations would definitely be rewritten. Demons might still break through the human defense line in Selnes Theater of Operations; however, they would have to pay a much higher price. Humans might still complete a strategic retreat from Selnes Theater of Operations; however, a lot of blood, sacrifices and tragedies that should not have happened could be avoided.
Zhang Tie had won the honor of Selnes Eagle in Selnes Theater of Operations. It was the truest portrayal of the miserable situation of the allied human forces, especially the human airship troop in Selnes Theater of Operations; instead of being an honor, Zhang Tie had won the honor of Selnes Eagle.
Zhang Tie killed some wing demons in the air and shocked the command of the allied human forces in a subcontinent. As a result, he gained a great reputation and honor in the allied human forces in the frontline. This was a bit ironic and helpless.
The reason for this was that in Selnes Theater of Operations, demons had almost tortured human airships and air troops in Selnes Theater of Operations, not to mention the combat between human knights and human airships in the air. In many cases, when human airship troops and those brave glider pilots encountered wing demons, they would face a one-sided massacre …
In Selnes Theater of Operations, if glider pilots were selected as the bravest and most respected soldier with the largest casualty rate, nobody would deny it.
As the only air cavalry across Selnes Theater of Operations, Zhang Tie was very clear that the sky within millions of square miles in Selnes Theater of Operations was covered with the blood of numerous human glider pilots.
The battle in Selnes Theater of Operations was a sad song played by human glider pilots and airship fighters at the cost of numerous lives and blood in Waii Sub-continent...
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