"Isn't there a heroic peasant worker who can stop this damned flat turtle?" Maxim was about to go crazy, there were already four Peasants' and Workers' Party officers rushing up with explosive bags to be beaten into a sieve by the damn "Winged Tiger", and the last one was his countryman, a veteran who had been in the army for more than ten years, and one of his most powerful company commanders, relying on his keen intuition, dodged many strafing bullets and a tank shell, and successfully drilled into the shooting blind spot in front of the tank, immediately brake sharply, and then start reversing quickly. Pen & Fun & Pavilion www.biquge.info saw the tank of the Chinese devil in front of him who was rapidly retreating, and the company commander was about to cry, is it easy for me to enter the dead end? I have the same heart to the end, isn't this the rhythm of playing to death when you retreat.

However, his embarrassment was quickly solved by an ironclad transport vehicle, which fired from the vehicle's machine gun and sent the Russian company commander flying sideways, and he threw out two anti-tank kits tied together a second before he was hit. However, after a roar, the disgraced Wing Tiger Tank shook its huge head, and continued to crush the remnants of the Russian army like no one.

"It's not scientific! Hell, are Chinese tanks really lumpy pieces of iron? , our shells are simply ineffective against them. A Russian tank company commander on the northern front also felt the same way: "Try again with a tungsten core armor-piercing shell." Hit the punctual point, hit his hull, don't hit the * turret, that's a turtle shell. ”

"Knock-boom" another armor-piercing shell hit the Wing Tiger tank, which was concentrating on destroying the KV2 tank of the Russian army on the right flank, and the tungsten core armor-piercing shell hitting the skirt was bounced off again, only this time the monster woke up, and the turret of the Wing Tiger tank rotated rapidly, and almost at the moment of stopping, a shell suddenly came out of the shell. The rapidly growing projectile in the observation window of this Russian tank company commander pierced through the poor homogeneous armor plate of T34 like a sharp stinger, and a scorching jet instantly turned T34 into an old furnace.

Whether it is a 37 anti-aircraft gun or a 76 mm tank gun, against the "Winged Tiger" tank with 450 mm homogeneous steel plates on the front and both sides of the armor protection, this level of attack is even very slight, and the tankers inside quickly chose a tail stabilized shell shell, and the KV1 tank 900 meters away on the opposite side is still nervously shaking the turret everywhere looking for the culprit who destroyed his compatriots. This heavy Russian tank with 35-110mm armor, after the start of the Russian-German war, the KV-1 tank began to fight the German army, and by June 1941 the Kirov plant had produced 636 units. At that time, the anti-tank guns and tank guns mainly used by the German army could not destroy the front armor of the 90 mm thick turret (the thickness was increased to 120 mm in the later period), and the German army had a strong deterrent effect (one blocked an infantry division for 3 days), so other derivative vehicles such as KV-1S and Su-152 were developed; In contrast, heavy multi-turret tanks such as the SMK and T-35 were often stopped due to malfunctions, which were seen as a major problem that hindered road traffic, and even more failures than were destroyed by the Germans.

"Target, fire" The commander's command has just been exited, and in the gunner's scope, the stupid KV1 is still there waiting to be beaten like a stupid roe deer, and the pedal on the sole of his feet does not hesitate to step down, and a slender tail like a needle is stable and detached from the shell, less than two seconds later, a small hole was pierced in the body of the KV1, but the next thing is that the high-temperature jet ignited the diesel fuel and ammunition, and the seemingly stocky KV1 turned into a raging bonfire, The other T34s scattered like frightened rabbits.

The power of the armor-piercing projectile depends on the kinetic energy (velocity, mass) of the projectile when the shell hits the target and the physical properties of the projectile material itself. In order to make the armor-piercing projectile still have a large velocity when hitting the target, the armor-piercing projectile must be designed in a shape that is conducive to reducing drag.

According to basic physics, the thinner the projectile, the less drag. But considering that the caliber of the gun is certain, scientists came up with a lightweight butt to sandwich the armor-piercing projectile body in the middle, the caliber of the butt is the same as the caliber of the cannon, the armor-piercing projectile is made into an elongated rod shape, and after the discharge of the cartridge buttle automatically falls off due to the effect of resistance, and the projectile body continues to fly along the barrel, which is the origin of the term "shelling". In order to ensure the stability and accuracy of the slender missile body during flight, when manufacturing the armor-piercing projectile, four tail fins are installed in the tail and arranged in a cross shape, so it is called "tail stability".

Since kinetic energy is determined by velocity and mass, in the case of a certain velocity, increasing the mass of the projectile body is another way to increase kinetic energy, so armor-piercing bullets are generally made of metal with higher density, harder and high temperature resistance. This also ensures that the body of the projectile is not easy to bend when it collides with the armor being hit, and the heat generated by the collision does not reduce the strength of the projectile. The materials used by the armored forces of the Wehrmacht are tungsten carbide and depleted uranium, among them, depleted uranium is denser and self-sharpening (it remains sharp during impact), which is a more ideal material, but because depleted uranium has radiation, and the current tanks of other countries do not have the protection against tungsten core tail stable detached bombs, so there are only a very small number of stocks of depleted uranium shells.

The armor-piercing projectile is a pure kinetic energy projectile, which completely relies on its own kinetic energy to hit the tank armor, and the impact of the high-speed armor-piercing projectile on the tank greatly exceeds the bearing limit of the armor and can be forcibly penetrated. In the process of passing through the armor, the high-speed core of the armor-piercing projectile will rub violently with the armor, causing part of the armor to melt and fly into the tank with the armor-piercing projectile, causing damage to personnel and equipment.

After years of development, the armored equipment research department of the Wehrmacht has evolved from the early sub-caliber deshelling armor-piercing projectile to today's tail stabilized armor-piercing projectile, its core shape is similar to a long arrow, the body is slender, the diameter is 20-30mm (the early model can reach 40mm), the length-diameter ratio is more than 20:1, and the tail of the core has a tail, which can maintain stability and shooting accuracy in flight. The shape of this similar long arrow can not only reduce the flight resistance and maintain the speed, but also have a small surface and a large impact force when colliding with armor, which can effectively increase the depth of armor penetration. Because the diameter of the tail stabilized de-penetrating projectile is much smaller than the caliber of the gun, it is necessary to put a belt on the core before it can be fired by the gun, and the function of the belt is to seal the breech and increase the force area of the projectile, so that the projectile can obtain a high muzzle velocity. The muzzle velocity of the Wehrmacht's tail has reached about 1,700 m/s, which is equivalent to 5 times the speed of sound, and the outer edge of the projectile belt is wrapped with a thin layer of copper hoop, and the copper hoop will rub against the barrel in the process of the projectile flying out of the barrel, and after the projectile flies out of the barrel, the belt is split and fallen off by the action of air resistance, and the remaining arrow-shaped core continues to fly at high speed.

Since it relies entirely on kinetic energy to destroy armor, the kinetic energy of the core and the hardness of the material become the most important performance indicators. In order to penetrate the armor of the tank, the hardness of the projectile must be high enough, so that it can have an advantage in the process of "hard hitting", and kinetic energy is also extremely important for tail stability and detachment, the greater the kinetic energy, the greater the armor-piercing power.

The factors that affect the kinetic energy of the bullet core are the diameter, mass, and velocity of the bullet core. The smaller the diameter of the core, the smaller the resistance of the core in flight, the easier it is to maintain speed, and because of the small surface and great power during impact, of course, the diameter of the core cannot be too small. The weight of the core is also an important consideration when designing: if the core is too heavy, it will increase the weight of the projectile (including the core and belt), which will reduce the muzzle velocity. The core is too light, although it can obtain a higher muzzle velocity, but its kinetic energy is smaller, it is more susceptible to air resistance in flight, the speed decreases faster at long distances, and the velocity is not good. Lower mass + lower velocity = lower kinetic energy, so the mass of the core is also an important factor affecting the power, and the use of higher density materials has become the best choice. The density of tungsten alloy metal is about 19 grams per cubic centimeter, which is 2.5 times the density of steel; At the same time, the hardness of tungsten alloy is extremely high, so it is very suitable for tail stability and decoupling bullet core.

The shell fired by the smoothbore gun cannot rotate because the gun body has no rifling, and the nutation effect of the shell itself has a great impact on the accuracy, so the tail of the tungsten alloy tail stabilized shelling armor-piercing projectile equipped with the smoothbore gun is to make the shell have a rotation ability after being disarmed, and improve the flight stability.

The 7th Army in the center quickly broke through several lines of defense of the Red Russian army under the rolling attack of three armored groups, and finally an armored reconnaissance detachment of the 3rd Red Division unexpectedly joined up with a mobile reconnaissance team of the 2nd SS Panzer Group of the German Army Group Center at Yershov, west of the Urals, on September 23, the 24th year of the first century. The two armies in iron-gray military uniforms met on the steppes on the right bank of the Don River, and also sounded the death knell for the Red Russia, a polar bear that had dried up its blood, and the Red Russia no longer had the ability to turn the tables.

On 25 September, the Don Front began to break north on its own, hoping to retreat north before the Sino-German encirclement was formed, so as to concentrate its forces in the defense of Moscow. On 27 September, the Red Russians recaptured Saratov and continued their offensive, opening a wide passage through the German lines. Then the bulk of the Don Front arrived in Ukyanovsk in late September and was sure to take part in the defense of Moscow. Red Russia took the initiative to abandon a large area of fertile land in the south, and arranged 7 lines of defense around Moscow with the spirit of 100 million broken jade, and only used the blood of soldiers to pave a road to victory.