In the annals of the history of domestic engineering, there are many secret projects that are legendary, overgrown with incredible details. One of the most intriguing and little-known areas of the public is the development of underground vehicles that can move in the thickness of the ground, like submarines plow the depths of the sea. subboat MoleThe existence of the archaeological system is still a subject of fierce debate among historians and engineers.
Rumors of a machine capable of tunneling and transporting goods or people underground began circulating in the mid-twentieth century, and conspiracy theorists have linked the project to the name of famed designer Nikolai Polikarpov or even to later Cold War developments, suggesting that the Soviet Union had technology that was ahead of time. unique vehicle.
In this article, we will try to analyze the available information as objectively as possible, avoiding excessive hoaxes, but also without denying the possibility of the existence of advanced for its time developments. You will learn how such a device could be built, what principles of movement were used in it and why, even if the Mole project existed, it did not receive mass distribution. subterranean The mechanics of ground movements will be an exciting journey for anyone interested in the history of technology.
The origin of the legend of underground transport
The idea of a machine that could move underground is not new and dates back to early twentieth-century fantasies, but in the Soviet Union it received an unexpected technical embodiment in the form of specific engineering research. In the postwar period, when the arms race required the secret location of strategic facilities and rapid transfer of forces, the concept of a new model of the development of the new system was developed. subterranean The work was done in closed research institutes, according to fragmentary data, where engineers were looking for ways to overcome ground resistance without using traditional tunneling shields.
Of particular interest is the 1960s, when the press and technical documentation were mentioning the vehicle, codenamed the Mole, which was supposed to be able to reach speeds of up to 10-15 kilometers per hour underground, which is a fantastic indicator for hard rocks. Soviet engineers The Russian authorities considered the possibility of using such devices not only for military purposes, but also for laying pipelines in remote areas of Siberia and the Far North, where traditional methods were economically impractical.
But with the declassification of the archives, it became apparent that the term "underground boat" was often used as a metaphor or as a designation for deeply preserved projects that remained on paper. However, the existence of prototypes that could pass short stretches underground is difficult to deny, and these developments became the foundation for modern tunneling systems, although it was likely that the creation of a full-fledged vehicle for people was not achieved due to enormous technical difficulties.
Design features and principle of work
If you abstract from mysticism and consider the issue from the point of view of physics and mechanics, creating an apparatus that moves in the thickness of the soil requires solving the most difficult problems. subterranean boat mole It was not going to be mechanical cutting of rock, as in conventional tunnel tunnelers, but liquefying or sealing, and patents from the time described methods of thermal treatment of the slaughter or the use of high-power ultrasonic vibrations to reduce friction of the housing against the wall of the tunnel.
The body of the vehicle was made of heavy-duty alloys that could withstand the enormous pressure of surrounding soil, supposedly shaped like a torpedo or spindle, minimizing drag on the move, and contained crew compartments, power plant and life support systems that operate in autonomous mode. Navigation In such conditions, it is possible only with the help of inertial systems, since radio waves in the earth's thickness do not propagate.
The focus was on the rock removal system, which in the classical sense, the Mole was not supposed to leave a void that needed strengthening, or it was supposed to instantly reinforce the tunnel walls with a special fast-hardening compound, which would make the vehicle fully autonomous and allow it to move along a complex trajectory, bending underground obstacles, implementing such a system would require a huge amount of energy, which was one of the main ones. technical limitations project.
Technical details of the engine
Some sources have suggested using compact nuclear reactors or Stirling engines to provide power in autonomous mode, but high heat transfer made these options dangerous for crew in confined spaces.
Technical specifications of the hypothetical apparatus
Analysis of the remaining technical assignments and patent descriptions allows to reconstruct the approximate appearance of the machine, known as the "Special Design" submersibleAlthough the exact data is classified or lost, the historians agree that the machine must have had a number of unique parameters that are not available to conventional construction equipment at the time, a combination of high power, compactness and the ability to operate in extreme conditions.
The cooling system was the most important element, because when you move in the ground, you get a huge amount of heat. Without efficient heat removal, the machine would turn into a furnace in a matter of minutes. And the sealing system was critical, so that you couldn't get soil and water inside the housing at high pressure. Power plant It had to be not only powerful, but also safe, narrowing the range of options to high-density electrical systems or specific closed-loop internal combustion engines.
The following table shows the expected specifications of the device based on the analysis of the technical documentation of the period:
| Parameter | Meaning | Units of measurement |
|---|---|---|
| Diameter of the shell | 2.5 - 3.0 | square |
| Speed of movement | 15 | km/h |
| Depth of immersion | 500 | meters |
| Crew | 2 - 4 | human |
| Autonomy | 48 | hours |
It is worth noting that these values are theoretical and could vary depending on the type of soil and the specific modification of the machine. Realizing such specifications in metal would be an outstanding achievement of engineering, putting Soviet science a step above world analogues.
☑️ Criteria for the underground apparatus
Implementation problems and technical limitations
Despite the ambitious plans, the creation of a full-fledged subterranean It faced a number of fundamental problems that could not be overcome even with all the resources of the Soviet defense industry: the first and main obstacle was the resistance of the soil. Unlike water or air, the soil is a heterogeneous environment containing stones, voids, aquifers and rock inclusions. Any collision with a solid obstacle at high speed threatened disaster.
The second problem was navigation. You can't use GPS or radio underground, and the only way to navigate was with gyroscopes and inertial systems, which tend to accumulate error over time. The margin of error A few meters away could cause the machine to crash into the foundation of the building or surface in an unintended location, and real-time course correction was virtually impossible.
⚠️ Attention: Driving in the patchy ground without prior exploration was a direct threat to the crew's life, and a collision with a floater or gas pocket could have resulted in the hull instantly collapsed or the vehicle was taken off course.
The third factor was the economics of the project, and the cost of building and operating such a machine was astronomical, laying even a short section of the Mole tunnel would cost more than building a full-fledged metro line in the open way. sub-boat It was not appropriate, which predetermined the fate of the project.
When you look at old engineering projects, always consider the level of material science that was developed at the time, and many of the concepts were physically impossible because they didn't have the alloys that were strong enough.
Comparison with modern tunneling complexes
Now, looking back, the idea of the Mole didn't go away, but it was transformed into modern tunneling systems. Herrenknecht or RobbinsThey're successfully tunneling around the world, including complex projects like the St. Petersburg subway or the Channel Tunnel, but there's a big difference between them and the dream of an underground boat.
Modern TPKs are essentially factories that are not designed to travel long distances quickly with cargo or people inside, but rather to create a tunnel, not a vehicle, and they move slowly, centimeter by centimeter, carefully strengthening the walls. Underground boat It also implies a transport function, which requires completely different speeds and maneuverability.
However, the technology developed for the Mole has been used to make more efficient cutting heads and soil removal systems, and engineers have learned to better manage the pressure at the bottom, allowing for difficult sections to pass without subsidence, and we can say that the Mole died as a transport, but reborn as a construction technology, becoming an integral part of modern infrastructure.
Cultural footprint and influence on fiction
The inability to fully implement the project has given rise to a rich soil for the imagination of writers and filmmakers. subterranean It became a popular trope in Soviet and foreign fiction, and in books by authors such as Vladimir Obruchev (Sannikov Land, though it's more of a rig) or in later steampunk and dieselpunk works, these machines are described as formidable weapons or means of saving humanity.
In popular culture, the Mole is often endowed with mystical properties, becoming a symbol of the latent power and technological singularity of the past. Games, movies and comics operate the image of an armored capsule rushing through the bowels of the earth, leaving behind a flat tunnel, an image so firmly entrenched in the mind that many people sincerely believe in the existence of real prototypes hidden in bunkers.
Interestingly, in Russia, with its vast expanses and challenging climates, the subject of underground transport remains particularly relevant. The dream of moving underground, bypassing traffic jams and frosts, continues to inspire inventors. Perhaps someday, with the development of magnetic levitation technologies and new materials, the dream of personalization is a dream of a new kind of life. subterranean It will be a reality, but on new physical principles.
The Mole project has become a bridge between fantasy and reality, proving that even unrealized ideas drive progress by stimulating the development of related technologies.
Conclusion: Myths and Reality of Underground Travel
To summarize the study of the Mole underground boat phenomenon, it is safe to say that the line between a real engineering project and a beautiful legend is extremely thin here. On the one hand, there is documentary evidence of interest in the subject by military and scientists, patents and reports of experiments. On the other hand, there is no confirmed successful operation of such a device for transporting people over long distances.
The Mole is probably a series of bold but technically impossible experiments, but it is experiments like this that move science forward, forcing the search for new solutions and approaches. subterranean It is a reminder that human thought knows no bounds, even if technology is not yet keeping pace with our ambitions.
Ultimately, whether the Mole existed in metal or only in blueprints, the important thing is that this idea continues to live on, transforming into new projects and inspiring new generations of engineers, and maybe today, in some labs, prototypes are being created that will become a normal transport in decades, and then the tale of the Mole will become reality.
⚠️ Warning: Do not try to replicate experiments in the field of soil traversing at home, which requires industrial equipment and strict safety standards.
Link to the Transit project
There is a version that the development of the "Mole" was partially used in the project "Transit" - a system of high-speed underground transport, which was also not implemented in full due to the collapse of the USSR and the lack of funding.
Frequently Asked Questions (FAQ)
Did the Soviet underground boat really exist?
There is no documented existence of a fully operational underground boat, most likely a series of experimental installations and theoretical developments that did not go beyond the prototype stage or remained on paper.
Who is the author of the Mole Project?
The exact name of the author is difficult to say, because the work was carried out in closed research institutes by teams of engineers, often attributed to various design bureaus engaged in mining equipment and defense order in the 1960s and 70s.
Why was the project closed?
The main reasons were the high cost, technical difficulties with navigation and safety, as well as the economic inexpediency compared to traditional methods of tunnel construction.
Are the Mole Technologies currently in use?
Some principles, such as methods of soil liquefaction or the shape of cutting heads, are used in modern tunneling complexes, but in a highly modernized and automated form.
Can I buy a model or drawings of the Mole?
Officially, the blueprints can be archived or classified, and only amateur models or fantastic reconstructions that are not related to real technical documents can be found on sale.