Chapter 670

"Chief, they started to turn, and our landing points are too scattered. Today's sea breeze is too strong..."

The observer hand passed on the latest news again, and Kalu's face became darker.

The big eyes beside karu said in a low voice: "karu, the trajectory of our shells has changed too much, which should be related to the increasing wind at sea today. In the past, when our artillery regiment was training, we also encountered such a situation, so I think if we shoot closer to the enemy ships, the effect would be better. "

Dayan is the head of the artillery regiment of the fourth division of the storm bear army, and shuigouzi, the head of the coastal artillery regiment, is the right arm of Dahe. Naval gunners and artillery growers are all elite selected from the fourth division artillery regiment and coastal defense artillery regiment, so Dayan is very familiar with naval gunners, gunners and even observers.

Big eye's words, the stone bear naturally also hears in the ear, he tiny can't check of nod.

Compared with the artillery of the army, although these recruits of the navy have no problem in shooting, naval warfare and land warfare are very different things, so their experience is far from satisfactory.

Kalu's face moved, and he bowed his head for a moment. Then he nodded thoughtfully. He grabbed his head and turned to the signalman beside him and said, "inform other ships to stop shooting. We need to shorten the distance between us and the enemy ships before shooting. Well, shorten the distance to seven kilometers, test two rounds, if the effect is not good, continue to shorten the distance. We must make use of this rare actual combat to find out the best shooting distance of the main gun. "

The signalman immediately carried out Kalu's order, and soon the original roar of artillery disappeared.

When the 105mm shipborne main gun fired, the sound was very loud. Although it could not be transmitted to the shore more than 50 kilometers away, the sailors of noel fleet could hear it clearly at a distance of more than 10 kilometers.

The sound of dozens of main guns salvo is not much worse than thunder

Now the thunder stopped suddenly, and Noel, who had completed the U-turn, couldn't help smiling.

Although he did not know where the strange ships on the opposite side belonged, there was no doubt that they were hostile to their own fleet.

In such a long distance, Noel thinks he can't resist the enemy, but if he wants to escape here, Noel still has eight points.

Noel's great confidence is mainly due to the speed of the two warships, because the installation of the copper bottom of the two warships was completed last year, and their speed has increased a lot.

The so-called copper bottom is to cover the bottom of a warship with a layer of copper.

For warships in the sailing age, the biggest threat is not the enemy's shells, but the shellfish attached to the bottom of the ship. This kind of marine creature, commonly known as "boat worm", is good at making holes in wood, which can make the bottom of the boat full of holes and lead to serious damage. In addition, the bottom of a warship that has been going to sea for a long time will be attached with aquatic plants. The longer the warship is, the slower its speed will be.

Therefore, since the history of navigation, human beings have been seeking various countermeasures to inhibit the growth of ship insects and aquatic plants, but due to the limitations of science and technology, the effect is not ideal. Warships of all countries can only return to the port regularly to clean the bottom of the ship, which not only consumes manpower, but also often delays the aircraft.

Around 1750, the British began to use copper to cover the bottom of ships to prevent the adhesion of insects and aquatic plants.

In 1761, the British Royal Navy cruiser "alarm bell" laid copper sheet on the whole bottom of the ship, and then cruised out to sea. After two years, it came back for inspection and found that the protection effect was excellent, and no foreign matter was found on the bottom of the ship.

However, new problems appeared very quickly. The copper coating on the bottom of the ship began to peel off after a few years. The reason was that the iron nail fixing the copper coating gradually corroded due to electrolysis and finally broke.

Later, after many years of experiments, scientists finally found a solution. In 1786, the Royal Navy began to use copper zinc alloy nails instead of iron nails to fix the copper skin on the bottom of the ship, which solved this problem.

Especially with the outbreak of the war of independence, France, Spain and the Netherlands declared war on Britain one after another. The Royal Navy is faced with severe challenges. The fleet is going to sea more and more frequently and for a longer time. It is an extravagant hope to clean the bottom of the ship regularly. So the British Admiralty decided to cover the bottoms of all warships with copper. By 1781, all the main ships, cruisers and auxiliary ships of the Royal Navy had been equipped with copper bottoms, becoming the first "copper bottomed" fleet in the world.

The warships with copper bottoms not only reduced the trouble of cleaning the bottom, but also brought an unexpected benefit to the British, that is, the speed of warships with copper bottoms has been greatly improved.

In the era of sailing, in order to achieve higher speed, warship builders will try their best to improve the hull line. France is leading the trend in this respect, and a large number of designers proficient in the so-called "hydrodynamic principle" have emerged.

French warships are famous for their graceful and smooth lines, but their speed advantage is not obvious compared with British warships. The French naval generals could not understand it, and they could only blame the poor construction quality of their warships. This is actually a misunderstanding of the scientific community in the 18th century.

In the sailing age, the speed was usually less than ten knots. At this speed, the maximum resistance of warships came from the friction between the hull surface and the water, not from the lines. Because of the smooth bottom surface, the resistance of the bronze bottom warship is far less than that of the ordinary warship, so when the Royal Navy warship is equipped with copper bottom, the speed is often inexplicably fast.

This accident was quite confusing to the experts of the Navy Department, and the generals who only cared about the actual combat performance were naturally overjoyed.

Later, the French and Spaniards also got the news of "copper bottom". Although they could not figure out why warships with copper bottom could get higher speed, it did not prevent them from learning from the British and providing copper bottom for their warships.

It was only last year that Noel's Atlantic horn had just completed the preparation of copper bottoms, while the seahorse, another class III windsurfing battleship in the sub fleet, also had copper bottoms.

As for the three armed merchant ships, it was naturally impossible to provide copper bottoms. But it has nothing to do with Noel, who is now ready to give up the three Spanish armed merchant ships.

There are many factors to make such a decision. The most important one is that Noel thinks he must escape from the sky and send back the news of the emergence of such strange ships in the new continent of North America and the kind of artillery that can hit more than 10 kilometers. That's what Noel thinks is the most important thing.

It's a pity that Noel, who is trying to escape, suddenly finds that even though his two ships have soared to nearly 11 knots, those strange ships behind are still rapidly narrowing the distance.

Even half an hour didn't work, and the sea sounded like thunder again