The scene of this magic change "big flying" "galloping" on the water left an indelible impression on everyone present, which was extremely shocking. But after calming down, I was thinking about a question - what is the use of this kind of magic change?

You said that if you take it to combat the handle, it's useless just to be fast. After all, ships aren't meant to collide with people. Even if you catch up, you have to rely on firepower to solve the opponent. And the warships of the Beihai State have a speed that is not lower than that of other countries' warships, and they can catch up on their own. Using a diesel engine doesn't seem to be very cost-effective......

If it is used as a speedboat to convey information...... No matter how fast the ship is, no carrier pigeon can fly fast...... If it is an ultra-long distance across the Atlantic, a place where it is difficult for carrier pigeons to reach, you can also use this kind of big flight, that is, it is too fuel-guzzling!

According to estimates, the 12-horsepower single-cylinder diesel engine in Marin consumes two to three liters of diesel per hour, and if the four engines are juxtaposed, it consumes 12 liters of diesel per hour. If you run for 10 hours a day, a big fly will cost more than 100 liters of diesel......

But for the current Marin, diesel is in short supply, and the current reserve is only 10 barrels of diesel, which is about 1590 liters, which cannot withstand the consumption of several "big flying".

If it's just a message, Marin might as well get a clipper out of it. That way, at least it doesn't consume fuel. If you want to really use a diesel engine, you can't do it unless you have a significant effect. For example, for naval warfare......

"Okay, let's play big this time and put the diesel engine directly on the battleship!" Marin fooled Leonardo da Vinci and his disciples to go mad.

The crowd came to the hidden William Military Port and attacked the warships anchored in the harbor......

First of all, the rudder blade placed in the middle of the stern must be refitted. Because, according to the standards of Dafei, the rudder blade is easy to conflict with the parallel propellers in the middle. Therefore, the rudder blades can only be placed on both sides.

Fortunately, this problem is not big, as long as there is a steering wheel system, and a labor-saving lever system combining fixed pulley and movable pulley is installed, the rudder blade can be placed on both sides of the stern. Then, the captain stood in the middle of the stern and pulled the steering wheel.

Then it was time to install diesel engines, 250-class armed merchant ships, seven or eight meters wide, and Marin placed eight 12-horsepower single-cylinder diesel engines according to the space of one meter.

The next step is testing......

Unlike the tests of river boats, after all, it is a large ship with a displacement of 250 tons. Eight 12-horsepower diesel engines have a total horsepower of only 98 horsepower, and in later generations, people's fishing boats start with 150 horsepower......

As a result, when the sails were not raised, eight 12-horsepower diesel engine-powered 250-class armed merchant ships could sail at a speed of only 8 knots.

However, with the sail hoisted, the two power bonuses can run at a high speed of more than 13 knots downwind......

If there is a headwind or no wind...... Speed of 8 knots is king!

And after the transformation of a 500-ton warship, this effect is even worse. After all, the tonnage has doubled, but the power has not changed......

In fact, 12 single-cylinder diesel engines can be placed on a 500-ton battleship. However, Leonardo da Vinci and his mechanical students only had a total of 10 useful ones, and two of them were damaged, so they can only be tested with 8 at present.

96 horsepower to drive a 500-ton ship, naturally very difficult. In the absence of wind, the speed of the 500-ton warship is only more than 4 knots...... This help is not as good as others paddling with oarsmen...... Even if 12 single-cylinder diesel engines are filled, Marin estimates that the windless speed is more than 5 knots, which is of little significance. No way, the ship is too big, and the diesel engine power is too small......

Marin wanted to improve the power of diesel engines, but unfortunately, he had never learned mechanics in his previous life. Being able to know the principle of the internal combustion engine is taught in middle school textbooks. I can know that the single-cylinder diesel engine is built, and I remember it with my father's walk-behind tractor at home. As for the design principle of diesel engine, how to improve the power ...... Sorry, we're not professionals......

As for the science boss Leonardo da Vinci, he still learned the power calculation formulas such as the kinetic energy equation from Marin, and he is counting on him to improve it...... If Leonardo da Vinci had been 20 years younger, he might still be able to count on ......

But anyway, the standardized 12-horsepower single-cylinder diesel is right there. As the mechanical department trains mechanics one after another, there will always be excellent mechanics who can improve the diesel engine.

Marlin knows that if the diesel engine wants to achieve high power, it must use multiple cylinders. However, he didn't even know much about the principle of multi-cylinder steam engines, let alone diesel engines? Therefore, he could only write this sentence on the textbook of Leonardo da Vinci's Department of Mechanics -

"According to the sage St. Einstein's speculation, if the cylinder is added, it is estimated that the power and performance of the steam engine and diesel engine can be improved!"

As for the rest, Marin can only hope that another genius like Leonardo da Vinci will appear among the mechanical students, who can design a high-power multi-cylinder diesel engine.

For this, Marlin offered a high reward - whoever can make a multi-cylinder steam engine or diesel engine will be rewarded with 10,000 gold coins, a non-hereditary knighthood!

This is quite a reward, and a great god like Newton is only a knight until he dies, or because he became the governor of the Royal Bank of England. Others, who are not from aristocratic backgrounds, have almost no shortcuts except for going to the battlefield to make military achievements.

Therefore, Marin's reward is actually beyond the standard, and it is also very attractive.

But Marin knew that the reward was nothing compared to the benefits. You must know that once the steam engine realizes the linkage of two cylinders, it can be applied to the train, so that the train can run at a speed of twenty or thirty kilometers or even 40 kilometers per hour. When applied to ships, it can also make ships run at speeds of more than a dozen knots.

If the diesel engine can achieve multi-cylinder linkage, it will be even more remarkable. Its extremely fast speed will make people enter the era of internal combustion engines, and the speed will be greatly improved. Most importantly, it can make the emergence of diesel-powered cars and change the way people travel.

Marin began to regret that he didn't take the mechanical department in his last life, and he knew that he was going to cross, so he studied a double degree in history and mechanics......

Back then, when he took the college entrance examination, he was three plus two, and he could choose any two subjects other than the number of languages. For example, candidates can choose a bizarre combination of physics + history......

Later, I probably felt that although this model was humane, it was not convenient to manage teaching, so I changed it later......

You must know that at that time, students who took courses across the liberal arts and sciences, if they chose physics + history, they might take classes in science classes in the morning and go to liberal arts classes to study history in the afternoon, which is a bit like a university model, which makes the school management extremely difficult. But how can a student beat the school? Therefore, it is normal for this humanized course selection model to be cut later......

……

In fact, it is great that Marlin was able to bring the simplest single-cylinder diesel engine to this era. Because, this simply disrupts the development of the normal tech tree in the world.

You know, even if it's a walk-behind tractor, it's a very good existence. Not to mention the efficiency of ploughing, even if you run on the road, you can run at a speed of more than ten or twenty kilometers per hour, and you don't need to rest to finish the horses. Moreover, the cargo capacity is much larger than that of a horse-drawn carriage.

In addition, the head of the single-cylinder diesel engine is also a universal product, which can drive the rice mill to grind rice, drive the steel grinding surface, and drive the water pump to pump water for irrigation......

Well, with the addition of specially designed suspension equipment, it can also act as a harvester, which is much faster than a human being......

The only problem is that the technology for oil extraction is backward and there is no way to get enough oil......

……

Therefore, after thinking about it again, Marin did not feel the need to install a diesel engine on a 500-ton battleship. Because, these battleships, as long as the speed is not slower than the enemy ships, it is enough. In terms of strong firepower and resistance to beating, who can compare to the Galen battleship that was ahead of the era of the Beihai Kingdom for dozens or hundreds of years?

However, it is feasible for the 250-class armed merchant ships to be equipped with diesel engines. Because, the speed of 8 knots without wind is also very fast in this era.

Although it is not useful to be fast under normal circumstances, it is valuable if you learn the tactics of Bidus's fighting......

If eight single-cylinder diesel engines were added to the stern of a sailing galleys designed in the North Sea, how high would the speed of such a sailing ship be after the war? Even in a windless area, it can reach a speed of 8 knots, which is faster than the Calais ship. If the paddler cooperates with a few more strokes...... That speed is estimated to reach 10 knots.

When the time comes, in terms of maneuverability, who can compare to the 250 change sailing boat? Coupled with the Libusk Cannon in front of the galleys, Bidus's tactics can be used to the extreme......

"Well, it's decided, select a few 250-class armed merchant ships, refit them, and install 8 single-cylinder diesel engines. Since the French ship is called the Calais, it should be called the Dover ship......" Marin decided.

Dover is the English port directly opposite the port of Calais, two ports that together hold the narrow Calais Strait (known to the British as the Strait of Dover).

Since he had to be on England's side after all, Marin naturally considered the problem from England's point of view. Moreover, such boats were also designed for Calais ships.

In the future, regardless of whether the Calais ship could hit the English ships, the Dover ship with eight single-cylinder diesel engines added by Marin would not be able to escape as soon as the Calais ship called France was put in custody......