The Rise of the European Emperor
Chapter 1853
The so-called motor sailboat is to add mechanical power to the sailboat so that it can not be limited by the wind force and direction. Generally speaking, the sea is windy and the demand for mechanical power is not so strong. However, in inland waterway shipping, because the inland wind is small, the demand for power other than wind power is great.
Before, Marin also discussed this kind of problem with Da Vinci, and described the general principle of the motor sailing boat, and then ignored it. Later, Marin also instructed Da Vinci to come up with a single-cylinder Watt steam engine and a single-cylinder diesel engine.
However, these two kinds of machines have big problems on board. The first is the Watt steam engine. Because this thing is the first version, the speed is extremely slow and the efficiency is very low. Da Vinci put it on a boat for experimentation, but it only ran at a speed of three or four knots, which was not as fast as a sailboat.
The most terrible thing is that this original version of the Watt steam engine is very bulky and requires a lot of space. For example, after installing a watt steam engine on a 200-ton ship, not only the speed increase is limited. Moreover, the Watt steam engine, boiler, and coal storage room actually took up one-third of the entire ship's space, which was very uneconomical. Even, because steam engines and boilers are relatively bulky, they also dragged down the speed of ships driven by sails.
All in all, this first-generation steam engine can be used to pump water, drive ships, and even trains. It needs great improvement to be practical. This is also true during the Industrial Revolution. Watt invented the Watt steam engine in 1785, but it was not a good start until Fulton's "Claremont" in 1803 when it was applied to ships.
But the speed of the "Claremont" is also very low, only 9 kilometers per hour, which is 4.85 knots. Then, after several decades of improvements, until the middle of the 19th century, motor sailboats with steam engines gradually replaced pure sailboats.
On Da Vinci's side, although there is Marin's guidance. But Marin is also half-baked. He only learned the principle of Watt's steam engine in middle school, and he didn't understand the principle of the double-cylinder steam engine on the train or even the three-cylinder steam engine on the ship. Otherwise, he would have been able to bring Beihai into the age of steam in one step.
However, based on the memory of the broken walking tractor at home when he was a child, Marin also asked Da Vinci and the craftsmen to restore a 12-horsepower single-cylinder diesel engine.
But this single-cylinder diesel engine is more problematic, because it needs more parts and faster speeds, and this diesel engine is also extremely demanding to manufacture. Diesel engines are manufactured using the standard of making stupid, black and thick steam engines... So, the first batch of 12-horsepower single-cylinder diesel engines had a lot of problems, and they would lie down at every turn... Sometimes, the repair time of diesel engines is longer than that of diesel engines. Runs a lot of time...
Then, Marin didn't care about the mechanical things, and went about his own things...
But Leonardo Da Vinci did not give up. He divided dozens of mechanical college students under him into two groups according to their personal preferences. One group specialized in the improvement of single-cylinder steam engines, and the other group was led by him to specialize in 12-horsepower single-cylinder steam engines. The perfection of cylinder diesel engine...
In addition, Da Vinci also remembered the description of the "inland river speedboat" that Marin and he had said, that is, the single-cylinder diesel engine was hung on the stern of the inland river boat as a hanger to drive the boat to gallop on the river.
Therefore, in the days that followed, Da Vinci personally led the team to perfect the 12-horsepower single-cylinder diesel engine, greatly reducing its faults. At the same time, it is also studying how to turn a single-cylinder diesel engine into a marine engine.
During the period, Da Vinci also asked Marin about the propeller, but Marin didn't care, and drew a propeller pattern for him according to the blade pattern of the electric fan.
Let him find someone to process it by himself. Of course, this pattern is not nonsense. Because, the fan blades of the electric fan that Marin used in his previous life are said to be made in the style of a submarine propeller. At the time, it wasn't considered a publicity stunt. Marin then remembered the style of that electric fan, but gradually forgot it. But after traveling, his memory became stronger, and he "sorted out" many forgotten memories.
While drawing the propeller pattern to Da Vinci, Marin also drew him a schematic diagram of a speedboat driven by a hanger in later generations.
Marin didn't care about this, and it was an inspiration to Da Vinci. Da Vinci was very concerned about this matter. While optimizing the single-cylinder diesel engine, he was also experimenting with installing the single-cylinder diesel engine as an on-board engine on inland boats.
After some improvements, Da Vinci found that - because of the faster speed and stronger power, the wear of the diesel engine far exceeded that of the steam engine. Therefore, while standardizing the manufacturing process, design a space for adding oil in the parts of the diesel engine that are prone to wear, so as to reduce wear as much as possible.
Then, Da Vinci recruited students from the Department of Chemistry to help him extract high-temperature-resistant mineral lubricating oil from a pile of asphalt that had been refined from gasoline and diesel, which was used for the lubrication of diesel engines.
There is also the problem of overheating. The diesel engine rotates very fast, and can rotate hundreds of revolutions per minute. Even with lubricating oil, the heat generated by friction, combined with the compression and combustion of diesel fuel, produces very high temperatures that require practical means of cooling.
However, this is nothing. Because, Marin pointed out that their diesel engine structure has a water-cooled box, which can fully cool the fuselage. Moreover, the cooling of the fuselage should not be too important. It is necessary to ensure that the fuselage has a certain temperature, otherwise it will be difficult to meet the conditions for diesel combustion...
After long-term optimization and transformation, the 12-horsepower single-cylinder diesel engine can finally run for a long time without problems. At this time, Leonardo da Vinci began to try to install the single-cylinder diesel engine with few problems on the inland boat, and made what Marin called "speedboat"...
It was not difficult to install the diesel engine on board, and Da Vinci quickly got it done. However, as Marin said, it is more difficult to hold the diesel engine with one hand and turn it together with the propeller system to change the direction. Because, later generations of speedboats generally use light diesel engines instead of bulky diesel engines.
Da Vinci tried many times and found that the diesel engine weighing hundreds of pounds was really difficult to turn easily. Even turning it takes a lot of force...
In desperation, Da Vinci later changed his method, which was to fix the diesel engine and propeller. As for the steering problem, he also set up two linked rudder blades on both sides of the stern, connected together with a long rod. When you need to change the direction, you can directly adjust the direction of the rudder blade with the long stick...
After many experiments, Da Vinci finally came up with the so-called "speedboat" described by Marin. This "speedboat" is indeed fast, at least, in the eyes of people of this era. Because, relying solely on the power of a single-cylinder diesel engine without any other power, he actually ran a "high speed" of 7 knots...
But when Da Vinci triumphantly showed the "high-speed" diesel engine "speedboat" to Marin, Marin's expression was very strange... Nima, dare to call it high speed at 7 knots?
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