During the Cold War, the Soviet Union developed a mysterious** underground "land submarine" designed to launch attacks on key military installations in New York, USA. During the long arms race, the United States and the Soviet Union developed advanced weapons, such as strategic bombers, ballistic missiles, nuclear submarines, and aircraft carriers. Since the USSR lagged behind the United States in the field of aviation and aircraft carriers, it switched to the development of the underground sphere. The Soviet Union not only built a number of striking strategic nuclear submarines, but although these ** are difficult to detect by enemy radars and sonars, they cannot be completely concealed. Therefore, the Soviet Union envisioned that if it could build a "submarine" that could sneak under land, it would be incomparable.
This idea was actually proposed as early as the First World War, but it was not realized due to technical and other constraints, and even the later design drawings were passed on to Germany, which at that time also abandoned research and development due to lack of resources and other reasons. It was not until the end of World War II that the Soviet Union's R&D technology matured and the "Mole" program was restarted, intending to use this "land submarine" to secretly infiltrate New York, the United States, and detonate a nuclear bomb. As a result, the United States will suffer an unprecedented blow. This underground "land submarine" may make you think that it only appears in science fiction movies, but it did exist during the Cold War.
Such "land submarines" built in the USSR had a length of about 25 to 35 meters and a diameter of about 3 to 4 meters, and could carry a total of 18 people and 1 ton of ammunition. Inside the submarine is a huge conical large drilling rig, which allows such a "land submarine" to travel at a maximum speed of 15 kilometers per hour. The rig is made of high-strength synthetic steel, which allows it to travel unhindered even in extremely hard granite formations. What's more, this "land submarine" uses nuclear propulsion, which means that it can achieve unlimited endurance with only one nuclear fuel refueling. And the personnel inside the submarine can drill out of an open space somewhere when they need to replenish their daily necessities.
If such "land submarines" were mass-produced and put into use by the Soviet army, it would deter any country that dared to provoke the Soviet Union. Compared to airborne and special forces penetration, "land submarines" have a higher probability of concealment and a successful sneak attack. If this kind of thing crept out of the ground and you didn't know it, people in any country would shudder. This **skill is extremely good**, and even now it is a heavyweight secret**. I dare to assert that this is by far one of the most incredible submarines you've ever seen.
In order to compete with the United States, the Soviet Union developed this devilish **, intending to use it to destroy important US military bases, and even carry explosives or nuclear bombs to the United States or nearby areas to detonate, create a tsunami or **, and cause irreparable damage to the United States. Despite the fact that this "land submarine" went from drawings to reality, it is a pity that it was not really put into use by the army. When the USSR conducted the second test, this "land submarine" suddenly went underground **, which led to the death of all 18 people inside.
Soviet experts found that this "land submarine" is not as invincible as imagined, due to the complex geological structure of the earth, probably because the drill bit collides with the rock for a long time, it is easy to produce high temperatures, sparks, etc., coupled with operational errors are easy to cause**, once it happens**, the possibility of survival of the insiders is zero. As a result, the project was put on hold and there has been no sign of restarting. However, it has to be said that this project provided valuable inspiration for the development of shield machines later, which led to today's extensive transportation routes. What do you think about this?Welcome to leave a message in the comment area, your support is the motivation for me to keep updating. Okay, that's all for today's show, I'm a science snooper, and we'll see you in the next episode!