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≦≧≦≧≦≧≦≧≦≧≦≧"Twin starts, go forward with a bubble of *book*" said Mustafa from the conning tower

The TR1700 submarine is equipped with four MTU diesel engines with a total power of 6,720 horsepower, which are used to drive four generators, and then electrically drive a propeller at the tail, which is also a unique power combination of the submarine

The general warship is directly driven by the engine tail of the propeller, such a mechanical efficiency is the highest, however, the submarine is not suitable to do this, because, except for the situation on the sea surface and the depth of the snorkel, the rest of the time, the submarine needs to sail underwater, for ordinary diesel-electric submarines, underwater navigation can only rely on the battery pack at the lower part of the hull to provide electricity, the more the number of batteries, the larger the capacity, the greater the underwater self-sustaining force, and TR1700 more than two thousand tons of displacement, There is enough space for eight batteries of 120 cells each, so it is the most self-sustaining underwater and therefore the most sustainable, but even then, it can only last a few days at low underwater sailing, and if you go at 25 knots, it will only take an hour to use up all the power

Therefore, the nuclear submarine is the king, relying on unlimited endurance, you can stay underwater for a long time, and the time you can hold on depends entirely on the endurance of the crew itself

And diesel-electric submarines, not far behind, have invented a variety of AIP submarines to help ordinary submarines achieve large underwater navigation times

Therefore, ordinary diesel-electric submarines, in order to achieve the purpose of sharing, use diesel engines to drive generators, and then use the electricity of generators to drive the motor at the tail and, this also has a use, that is, when the water surface or the depth of the snorkel, while using the electricity generated by the diesel engine to sail while using excess electricity to charge the battery

Because at the time of departure, the power of the battery was full, because on the water, the efficiency of the propeller was not high, and the maximum voyage was only 15 knots, and because there were too many ships in the port, so Mustafa only ordered to start two diesel engines, which were enough to drive the submarine on the current voyage

With Mustafa's order, the crew of the turbine crew began to start two diesel engines

The starting mode of large diesel engine and car is different, the car is driven by the battery motor motor to drive the engine to a certain rotation after starting, and even if the large motor is made, there is no strong power to drive, therefore, the large diesel engine is started by compressed air bubble * book * (

As the crew passes through a set of complex pipeline valve system, the compressed air is fed into different cylinders according to the movement sequence of the pistons, pushing the piston to move, the huge crankshaft turns faster and faster and finally meets the rotation requirements, and then the fuel injector begins to inject fuel, and the sound of the diesel engine burning in the cylinder is heard in a smooth and orderly manner, and it is finally started

As an advanced diesel-electric submarine born from the 209 submarine, in the design, noise reduction is a key point, these four diesel generator sets are all configured on the double-layer bomb xing cushion and fully enclosed management, so that the noise from the diesel engine can not be transmitted, even if it is Mustafa on the control tower, can only hear the noise of the diesel engine

The large five-bladed propeller at the tail began to rotate, and the surrounding sea water was stirred and converted into thrust on the propeller, and the hull of more than 2,000 tons began to slowly move forward, this kind of propeller was also repeatedly designed, and the rotation was only 200 revolutions per minute, which can effectively reduce noise

"Left Rudder Three" watched out of the berth, and the captain gave the order again

The faster the boat, the more efficient the rudder will be, and at this time the submarine is only a few knots, so the hull is only slowly turning, driven by the current of the tail rudder

In the east, a round of red ri has risen, the light of gold sè is sprinkled on the blue sè sea, and everywhere you can see ships constantly busy, departing or arriving, all heading for their destination

And on the other hand, the largest tonnage ship of the Iraqi Navy at present, has begun to sail to its destination, the motherland, we are back

In order to avoid collisions with other ships, Mustafa set up a lookout post on the control tower, and he breathed in the fresh air again, and followed the ladder to the inside of the control tower

Then he heard a sonorous voice, and although he did not understand the words, he could also hear the dissatisfaction in his tone, because the other party spoke German

Leo, forty-one years old this year, a German consultant hired by Iraq with high salaries, Leo graduated with honors from the submarine academy, served on several submarines, and eventually reached the position of captain and his father, who was once a captain of German submarines in World War II, fought in the famous wolf pack tactics in the Atlantic Ocean for more than a year, and finally escaped the blows of the Allies and returned safely to Germany, Leo was nurtured by his father, and had a deep understanding of the cāo of submarines and tactics, after retiring from the command post, When he came to teach at the submarine academy, the Iraqi side spent a lot of money and effort to finally hire him to be the adviser to the submarine

Luca, the German adviser to the other submarine, was sent from the shipyard and was well aware of all the technical aspects of the entire submarine

After listening to Leo's speech, an interpreter next to him began to translate Leo's words into Arabic: "Advisor Leo said that our submarine is about to enter the sea and sail for more than 20 days, this is the sailing plan you have formulated?" I'm ashamed of you for having been sailing on the surface of the sea and avoiding the main shipping lanes, and as soon as you go out to sea, you should hide yourself underwater."

Due to the high degree of automation of the submarine, the required personnel is greatly reduced, so it is no longer necessary to be like other old submarines, because of the lack of space, the beds are designed to be very tight, three people sleep in one bed, and the work is in three shifts, in this way, there are always people sleeping on the bed, so this kind of bed is called a hot bunk, and now this submarine of more than 2,000 tons is designed with a total of more than 40 beds, in addition to the crew of the formation, you can also carry an additional squad

Now, in addition to the Iraqi submariners, there are also German advisers and an interpreter for the German advisers

After listening to the translated words, Mustafa frowned, this German adviser has always been very rigorous and serious, in the previous training at sea, it was all strict requirements, and it seems that this time is no exception

However, in the past, it was only a full-ship cāo training near the harbor, but now, the submarine is required to make a long voyage back to Iraq, and in order to avoid accidents on the way, the commander of the navy, Nasser, personally ordered to ensure safety

You must know that although the submarine has the great advantage of concealment, as a submariner, the danger is also very huge, the ship on the sea, once there is an accident, there can be rescue by other ships, and the submarine, once cāo makes a mistake, then, it is very likely, will become a living coffin for the whole crew of the boat

So, for the safety of the voyage, before setting out, they made a plan to sail from the sea, and, because in the vast sea, even if the submarine was sailing on the surface, it was not easy to be visually detected by a steamer from a distance, in order to avoid a collision, they deliberately avoided the busy international route, as a result, the German advisers were greatly annoyed

Seeing the captain come down, Leo continued: "Captain Mustafa, this submarine under our feet is used for war, this long-distance sea voyage is a rare opportunity for drills, if it is like this, it is a big waste to return to Iraq from the sea, we are driving a submarine, not a freighter."

Being said like this by a foreigner, everyone's faces can't be hung up, as Iraqi naval fighters, as fighters of the great Qusay, they are definitely not afraid of death, but, the point is that the order of the naval command is like this

Now that they have left the port and want to contact the headquarters, the communication tool used by the submarine is the long-wave radio, which has a narrow bandwidth, a small amount of information, and a long time, so a large number of communication satellites are used in later generations

All eyes were on the captain

Mustafa also hesitated in his heart, this time is indeed a good opportunity, and when the submarines return to Iraq, many times, they are afraid that they will be brought to the submarine base in the Persian Gulf, in the back garden of the Persian Gulf, there will be very few opportunities to sail on the ocean This is a rare opportunity for military training, and it is also an assessment of the training of submariners during this period of time

"Send a telegram to the command, we will carry out adaptation training in the process of returning home, and we will definitely stay safe during the training," the captain ordered

Maybe it can't be received at the base, but the deputy captain was about to say it, but suddenly it dawned on him that the captain's idea was really good

After making contact with another submarine, the two submarines finally unified their actions, revised their previous plan, and will conduct a series of acclimatization training in the process of returning home, including simple diving, afloat, including silent navigation underwater, including using some passing ships in the channel as imaginary enemies, and practicing torpedo attack tactics

Leaving the busy port, Mustafa gave the first operational order: "All personnel in position, close all hatches, and prepare for the dive" (to be continued)

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