Chapter 1853： "High speed" diesel engine "speed boat"

The so-called motor sailing is to add mechanical power to the sailing boat so that it can not be restricted by wind and wind direction. Generally speaking, the sea is windy and the demand for mechanical power is not so strong. However, in inland navigation, because the inland wind is small, the demand for power other than wind is great.

Before, Marin and Da Vinci discussed this problem, and described the general principle of the motor sailing, and then ignored it. Later, Marin also directed Da Vinci to build a single-cylinder watt steam engine and a single-cylinder diesel engine.

However, these two kinds of machinery are on board, and the problem is great. The first is the Watt steam engine, because this is the first generation version, the speed is extremely slow, and the efficiency is also very low. Leonardo da Vinci put it on the boat for the test, and the result was only three or four knots, which was not as fast as the sailing boat.

The most terrible thing is that this first-generation version of the steam engine is very bulky and requires a lot of space. For example, when a 200-ton ship is equipped with a Watt steam engine, not only the speed increase is limited. Moreover, the Watt steam engine and boiler and the coal storage room occupy a third of the space of the entire ship, which is very cost-effective. Even, because the steam engine and boiler are relatively bulky, it also drags the sails to drive the ship's speed.

All in all, this first-generation version of the steam engine, which can be used to pump water, is used to drive ships and even trains, and requires great improvements to be practical. This is also true during the Industrial Revolution. Watt produced the Watt steam engine in 1785, but it was applied to steamships. It was not until 1803 that Fulton's "Claremont" had a good start.

But the speed of the "Claremont" is also very low, only 9 kilometers per hour, which is the speed of 4.85 knots. Then, after decades of improvement, it was not until the mid-19th century that the steamer-equipped sailboat gradually replaced the pure sailboat.

Da Vinci's side, although there are Marin's instructions. But Marlin is also at the level of a half-hanger. He only learned the principle of the Watt steam engine in his middle school, and he did not understand the principle of the two-cylinder steam engine on the train or even the three-cylinder steam engine on the ship. Otherwise, he could have put Beihai into the steam age in one step.

However, due to the memory of the broken walking tractor at home when he was a child, Marin also let Da Vinci and the craftsmen restore a 12-horsepower single-cylinder diesel engine.

But the problem with this single-cylinder diesel engine is greater because more parts are required and the speed is faster, and the manufacturing requirements of this diesel engine are also extremely high. To build diesel engines using the standard of making stupid and thick steam engines ... So, the batch of 12-horsepower single-cylinder diesel engines had a lot of problems at the beginning, and they lay on the ground ... Sometimes, the time to repair diesel engines was normal than that of diesel engines. More time running ...

Then, Marin, regardless of mechanical things, was busy with his own things ...

But Da Vinci did not give up. He divided his dozens of mechanical college students into two groups according to their personal preferences. One group specializes in the improvement of single-cylinder steam engines, and the other group is personally led by him, specializing in 12 horsepower singles. The perfection of cylinder diesel engine ...

In addition, Da Vinci also remembered the description of Marin and the "inland speedboat" he said, that is, the single-cylinder diesel engine was hung at the stern of an inland river boat as a hanger to drive the boat to run on the river.

Therefore, in the following days, Da Vinci personally led the team to perfect the 12-horsepower single-cylinder diesel engine, which greatly reduced the problems. At the same time, it is also studying how to turn a single-cylinder diesel engine into a marine hook.

During, Leonardo also asked Marin about the propeller problem, and Marin didn't care. He followed him by drawing a propeller pattern according to the blade style of the electric fan and asked him to find someone to process it. Of course, this pattern is not nonsense. Because, the fan blades of this electric fan used in Marin's previous life are said to be manufactured in the style of a submarine propeller. At the time, this was not yet used as a publicity stunt. Marin then remembered the style of the electric fan, and then gradually forgot. But after crossing, his memory became stronger, and many forgetful memories were "sorted out" by him again.

While drawing the propeller pattern to Da Vinci, Marin also accidentally drew a schematic diagram of a speedboat driven by on-hook for later generations.

Marin didn't care about it, it was an inspiration to Da Vinci. Da Vinci is very attentive to this matter. While optimizing the single-cylinder diesel engine, he is also experimenting with installing the single-cylinder diesel engine as an on-hook on an inland boat.

After some improvements, Da Vinci discovered that because the speed is faster and the power is stronger, the wear of the diesel engine is far higher than that of the steam engine. Therefore, while standardizing the manufacturing process, designing a space for adding oil in the parts that are easy to wear on the diesel engine can reduce wear as much as possible.

Then, Da Vinci again called the students of the chemistry department to help him extract a high temperature resistant mineral lubricating oil from a pile of asphalt after refining gasoline and diesel oil for the lubrication of diesel engines.

There is also a problem of overheating. The speed of the diesel engine is very fast, which can turn hundreds of revolutions per minute. Even with the use of lubricating oil, friction generates heat, and compression-burning diesel produces very high temperatures, requiring a practical cooling method.

However, this is nothing. Because, Marin pointed out their diesel engine structure, there is a water cooling box, which can cool the fuselage more fully. Moreover, the cooling of the fuselage should not be taken too seriously. It must ensure that the body has a certain temperature, otherwise it will be difficult to achieve the conditions of diesel combustion ...

After a long-term optimization and transformation ~ www.novelhall.com ~ The horsepower single-cylinder diesel engine can finally run for a long time without problems. At this time, Da Vinci began to try to install the single-cylinder diesel engine that had been very few problems on the inland river boat, and made out the "speedboat" that Marin called ...

It is not difficult to load the diesel engine on the ship, and Da Vinci quickly makes people better. But, as Marin said, it is more difficult to change the direction by turning the diesel engine with the propeller system in one hand. Because, later generations of speedboats generally use light diesel engines, rather than bulky diesel engines.

Da Vinci tried many times and found that a diesel engine weighing a few hundred pounds was really difficult to turn easily. Even if it turns, it takes a lot of force ...

In desperation, Da Vinci later changed the method, which is 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, just hold the long pole to adjust the direction of the rudder blade ...

After many experiments, Da Vinci finally came up with the so-called "speedboat" described by Marin. This "speedboat" is indeed very fast, at least, in the eyes of people of this era. Because, instead of relying on other power, he relied solely on the power of a single-cylinder diesel engine, and actually ran out of the 7-section "high speed" ...

But when Da Vinci proudly showed Marin the "high-speed" diesel engine "speedboat", Marin's expression was very strange ... Nima, dare to call high speed in 7th?

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