There are many names in the history of domestic shipbuilding and boating technology that cause controversy among enthusiasts, but little can compare in the heat of discussion with the opposition of the legendary cruiser Varyag and small metal boats popularly known as the Korean. At first glance, such a comparison seems absurd: a heavy armored cruiser of the early twentieth century and a lightweight aluminum flat-bottom assembled from sheet rolled steel.
Both names became household names. Cruiser Varyag. It is a symbol of heroism, but also an example of a complex, not always successful engineering compromise design, where the desire for speed faced the shortcomings of metallurgy. The Korean Boat (often called so because of the origin of metal or assembly technology) is a symbol of practicality, affordability and survival in the harsh conditions of fishing. In this article, we will examine in detail what unites and what separates these two phenomena in the metal world.
Understanding the differences between these projects is important not only for historians but also for modern aqueous motorists, and the choice between buying a finished factory product or assembling a “constructor” made of aluminum is a perpetual dilemma. The key difference is the approach to the resource of the hull: if the Varyag suffered from metal fatigue at high speeds, the Koreans sin with low corrosion resistance of the alloy in the absence of proper processing. Let’s look at the technical nuances.
Historical context and origin of names
To understand the essence of things, you need to go to the origins. Cruiser Varyag. Built in the United States at Crump Shipyard in Philadelphia and launched in 1899, it was a cutting-edge boat commissioned by the Russian Imperial Navy, and it was designed to use steel of various grades, including armor, which was a technological challenge of the era.
By contrast, the term "Korean" in the marine engine industry came much later, in the second half of the twentieth century, under which the name hides homemade or small-scale boats assembled from sheet aluminum, often imported or mined on a residual basis. The Korean Boat It was a response to the shortage of high-quality watercraft in remote regions of Siberia and the Far East, where simple, maintainable and lightweight construction was required.
Interestingly, both names carry a geographical and political imprint: If the cruiser's name is related to the battle route and the death at the port of Chemulpo, the name of the boat is often associated with the trade of non-ferrous metals across the Far Eastern borders. Many fishermen still argue about the quality of the metal from which these pliers are welded.
Design features: Armor vs. Aluminium
The engineering solutions embedded in these projects are diametrically opposed: the cruiser Varyag was designed as a high-speed boat, so its hull had a complex hull. Body kit It included brangouts, stringers and beams designed to withstand enormous loads at full speed, but this is where the main problem lies: the lack of plasticity of steel led to cracks in the area of artillery attachments and boilers.
The Korean boat is a celebration of minimalism. flat-bottomed The basic material is an aluminum alloy (often Amg or its analogues), which makes it easy to cook the case even in the field, and the absence of a complex set is compensated by the thickness of the sheet and the geometry of the shape.
It's important to note the difference in the way we're tight, because the Varyag used complex bulkhead sealing systems that, alas, didn't always handle vibration, and the Korean type of boats, leakproofness is achieved by welding them all together. Welding This is a critical element in determining the survivability of the boat.
⚠️ Attention: When operating a boat, it is critical to check the condition of welds after each season, and aluminum is prone to microcracks in areas of thermal influence, which can lead to sudden water intake.
Technical specifications and comparison
To make an objective comparison between these two waters, we'll put their basic parameters into a single table, and the difference in scale is obvious, but it's the numbers that allow us to estimate the engineering scale of the projects.
| Parameter | Cruiser "Varyag" (1899) | The boat "Korean" (average) |
|---|---|---|
| Length | 132.2 meters | 3.5 - 5.0 meters |
| Case material | Steel (regular and armored) | Aluminum alloy |
| Speed (full) | 23-24 knots | 15-25 km/h (depends on the engine) |
| Crew | 572 persons | 2-4 people |
| Appointment | Ocean raider | Fishing, hunting, economic needs |
As you can see from the table, dimensions The cruiser needed a huge power plant of 12 boilers and two turbines to reach high speed, and the boat Koreans needed one outboard motor of 5-15 hp to move efficiently around the water area.
Why did the Varyag fail to develop full speed in combat?
Despite the 24 knots declared, the cruiser had barely produced 15-18 knots at the time of the battle at Chemulpo due to the poor quality of coal and the technical condition of the mechanisms.
Exploitation and survivability in real-world conditions
The survivability of the Varyag in the battle of Chemulpo became a legend, the boat withstood the hit of many shells, had holes below the waterline and fires, but continued to fire. gradation But metal fatigue and boiler problems played a role.
The Korean boat has a different form of survivability, a household one, and it's not as afraid of rocks, shoals and ice strikes as it is of them (plastic). Aluminum is shattered, but it rarely gets through, and you can repair it with argon or even a gas burner right on the shore.
But there's a downside: Aluminum alloys are susceptible to electrochemical corrosion, especially in salt water. If the Varyag rusted but lived for decades, the Korean without proper care (painting, anodic protection) can turn into a sieve in 5-7 years of active operation.
To extend the life of an aluminum alloy boat, use zinc treads mounted on a transom, which will create a galvanic pair and protect the hull from corrosion.
Assembly and maintenance: Instructions for the owner
If you decide that a boat like the Korean is your choice, or you want to understand the principles of metal hull care, you need a clear plan of action. Metal maintenance requires discipline, unlike composite materials.
The first thing to start with is defect Look carefully at all welds, especially in the nose and on the transom, look for oxidation marks, white spots or cracks, and any scratch on aluminum is a potential site of destruction.
Next comes the process of preparing for painting or corrosion-resistant coatings. The metal must be perfectly clean. Use grinding wheels and degreasing agents. Don't neglect primers that contain zinc.
☑️ Seasonal maintenance of metal boat
⚠️ Warning: Never use copper-containing antifouling paints for aluminum cases. Contact of copper and aluminum in seawater will cause instant and irreversible corrosion.
Modernization and tuning of projects
Korean boat owners often seek to improve their boats. The most popular type of tuning is installation. quilt Or reinforce the bottom with extra sheets, which increases the rideability of the wave and protects the thin bottom.
The installation of rundooks and decks is also popular, the "naked" hull is inconvenient for long transitions, creating sealed boxes in the nose allows you to keep equipment dry and adds to unsinkability. Floating - critical safety parameter.
As for the Varyag, it was being upgraded in service, but was limited by the shipyards of the time, and the replacement of boilers and artillery was planned but not completed before the war, and it is a lesson for all boat owners: modernization should be done in a timely manner.
Installation of sealed hazelnuts in the nose of the boat "Korean" not only organizes space, but also performs the function of emergency buoyancy, preventing flooding during overturning.
Comparison and selection for fishing
To sum up, it is not correct to compare a cruiser and a boat directly, but it is useful to understand the philosophy of shipbuilding. Cruiser Varyag. It is a monument of engineering, a victim of the political situation and technological constraints of the late nineteenth century, and a tragic but heroic destiny.
The Korean boat is a tool that is devoid of pathos, but full of utilitarian utility. For a fisherman or hunter who needs to deliver a trophy and himself home intact, a simple aluminum boat is often more reliable than a sophisticated plastic counterpart, the main thing is to monitor the state of the metal.
The choice between a historical reconstruction (if you're a fleet fan) and a practical homemade is obvious to the average user, but the memory of "Varyag" and "Korean"'s work has one thing in common: respect for water and metal, which helps a person conquer the elements.
Is it true that the boat "Korean" can be assembled independently?
Yes, it's absolutely real. The design of these boats is simple and doesn't require a complicated slip, but you need argon welding skills and an understanding of shipbuilding basics to ensure that the seams are properly geometryd and tight.
Which aluminum is best used for the body?
The optimal material is the alloy AMg5 (AMg5B), which has good weldability and corrosion resistance, and the use of pure aluminum or inappropriate alloys (for example, durals without protection) will lead to rapid corrosion.
Why did the cruiser Varyag sank while trying to climb?
When lifted in 1916 by the Japanese (renamed Soyu) and then handed over to England and then to Russia, the boat was badly worn out, and when towed to Vladivostok, it was caught in a storm, suffered holes, and was flooded by the crew in the Bunge Strait, as it could not go on its own course.
How long does an aluminum boat last if properly maintained?
With regular painting, canopy storage and no electrochemical corrosion, an aluminum alloy case can last 20 to 30 years or more. Metal does not rot like wood, nor does it age like plastic under ultraviolet light.