My German Empire

After Dietaya lost, the Allies quickly discovered that he made a big mistake in the tank landing: At the time, in order to let the tank and infantry attacked the beach head, the Allies' tank landing ship must try to close the beach and let the vehicle out of the cabin . However, such a drainage of 200 tons, including 9 tanks internally will have a live target for enemy gunfires.

In such a close distance, even if the light artillery can easily crack down on the landing ship. And once the ship is only damaged, it means that all tanks in the ship cannot be done on time, and the white loses a lot of combat power. This issue can be solved by placing the tanks in a small landing boat, but the Allies don't have so many landing boats for call. The best way is that the landing ship can open the tank in the case of keeping a distance from the beach, let them land on the water.

However, the light-type water and land, the two-purpose tank defense ability is too bad, and it is impossible to resist the attack of the anti-tank. The medium-sized tanks that have a good defense are too heavy -, if the British equipment of the British Equipment is all all-round. There are about 30 tons, and the domestic Churchier tank is more than 38 tons, once in water, it will be asked as a scales.

So Hobart turned its attention to the "Double Promotion" equipment (ie DUPLEX DRIVE, abbreviated as DD) developed by the inventor Nicholas Sterfusler.

Strusler (1891-1966) was born in Hungary. A variety of folding floating devices have been designed before I get the British nationality in 1933. The design purpose of the DD device is to provide floating ability to include large vehicles, including tanks. It is mainly constructed to be strictly mounted on the folding canvas waterproof screen around the upper body of the tank, and the waterproof curtain can provide buoyancy for the tank. Sealed waterproof protection, at which time the tank does not sink or in the water under the waterline. In addition, the DD device also provides a propeller propulsion device that is directly driven by a tank engine that allows tanks to travel in the water.

In June 41, the British army conducted a test in the Brent Reservoir, a demise of a county of DD equipment, and the results were successful, and DD equipment was also finalized in June 1942. At first, the British army chose the Fan Lun Thai Infantry Tank of the Fight for DD Equipment as the main carrier of DD equipment, a total of 650 Vanrentai III (installed 2 pounds) and VIII (installed 6-scale fire gun) were transformed into a Vanrentai DD tank . But Hobart believes that this old tank has been out of time, decided to use a newer American Serm Series tank as a new DD equipment carrier.

In the first Sherman tank, the first Shelman tank is modified, and the foldable canvula is installed, the inner lining ring rubber air hose skeleton is installed on a boat platform soldered around the tank. The working mode is to inflate through the trachea to the rubber skeleton. As the gas is filled into the rubber skeleton, the plastic wrap is high, and the bracket locks the tarpaulin. The operation is completed by the tank car group, only 15 minutes on the tank landing ship deck. The tank is ready to go to the tank. The expanded taro provides nearly 1 meter dryboard space, and the whole car is powered by the two small propelles installed on the rear of the body. The direction is controlled by swinging the propeller, and the additional direction is attached to the turret. Herridge implementation.

The tank is slower in the water, depending on the situation. Level 5 is much better than the risk, but this limitation does not pay attention to it, and therefore, there is often a catastrophic accident. When the water depth to 1.5 m vs. can be collapsed, it will be the moment of "DD Sherman" tanks, and its main gun can be fired.

The "DD Sherman" tank did not navigate the machine gun, but its artillery provided a strong and direct fire support for the British soldiers who landed, especially in Normandy landing in June 22, 1944, the effect was obvious. Once the water, the propeller in the back of the body can be collapsed, leaving the beach it is a standard main battle tank.

Germany, World War II, also studied amphibious tanks.

I don't know which talents of the German Army. After seeing the Navy's submarine, the cerebral cave is open, and it is intertwined to let the tank swim through the English Channel. To be honest, this idea is like someone tells you that tomorrow the sun will not be credible from south. However, the high-rise and mustache of the mainland army may be dizzy, which has really approved this plan. And Germany engineers, not only in accordance with the requirements of the military, but also really succeeded.

They plans to transform three tanks, or 4 tanks, so that they can act underwater. Finally, Germany's engineers chose four tanks, because it was the largest tank in Germany, the strongest tank, and the protection of the protection is best. Engineers chose the D-Types and E-types of the four tanks as the foundation of the R & D, which is nothing more than their maximum model.

They are modified to the four tanks, and the main guns of the tank are seal, plus the protective cover, and other places and machine gun shooting ports that may have leakage, and the waterproof material is sealed. The hatch, turret, armored parts of each part of the body are equipped with rubber gasket and put the top cover. In addition to the ordinary four-tank, the difference is not very large in addition to the support rack of the fixed ventilation and pipelines.

However, the original four tank is different, it has a lot of ventilation and underwater navigation compass. The ventilation is contained in the ventilator, the exhaust pipe is equipped with a unidirectional exhaust device, and the air is introduced into the cabin when the tank dive. The ventilation device is composed of a floating label for a 18-meter ventilator and its front end. The suction port and radio antenna are installed on the buoy of the ventilator, and the air entering the tank cabin is entered from the buoy. When the diving tank advances in the water, its float floats on the water and supplies air in the car through the floating mouth.

After a large transformation, this submersible tank has been able to reach the largest depth of 15-18 meters under water. It is also possible to travel along the bottom of the underwater. In this point, it seems that this tank has a combat power, as long as you gather a few armor groups, these diving tanks can capture the UK.

It's just that ideals are full, and realistic is very bone.

First, this unlucky vent tube is completely on the water surface, if the buoy is in water, then the water will flow into the tank along the ventilation, and the people in the car will be drowning. Secondly, this tank can be up to 30 minutes underwater, more than, the carbon monoxide concentration in the car will be too high, there is a possibility of causing a member of the car group. If the specified value is exceeded, then a large amount of carbon monoxide has a danger of explosion.

In addition, this diving tank, although the theoretical dive depth is 18 meters, but it must be a smooth surface, if the wind is too large, it is estimated that the tank is easily covered by water. When using, the diving tank must be transported by a barge to the cutting sea. After the water is not far from the target coast, the water must be a gentle sand, otherwise the tank will be anchored directly. In addition, it is very limited in the field of view. If you encounter an obstacle, it is estimated that it is difficult to surround the past. If it is not resistant to the barrier, or anchor, then it will stop in the same place, and finally become a real dive tank, which will never come.

In addition, even if it is really on the shore, there is no way to fill it immediately. Since the tank is required to lathery, when the tank is constructed, the Germans use a large number of sealing materials for waterproof. As a result, weapons on the tank cannot be used immediately after landing. Because of some important components, such as artillery, machine guns and travelers are filled with a large number of sealing rubber and foam.

The tanks must also be removed, because these hoses of the 18-meter hoses prevent the normal advancement of the tank, and the rear exhaust emissions also need to be re-installed. Therefore, after the car group needs to remove these diving equipment, the tank can play a true combat effectiveness. When you are all busy, the enemy is not good. So this weapon is not very good. It can be said that it is a bit of a blush.