Metal flat-bottoms remain one of the most sought-after swimming aids among fishermen and hunters, and the model is Dive 21 This boat is a classic example of the trade-off between water stability and maneuverability, making it ideal for fishing in shallow waters and overgrown waters. Many users choose this dimensional range because it allows for comfortable accommodation by two, while still being transported on a passenger trailer or even on the roof of the car with proper training.
Unlike the larger ones, Dive 21 It is lighter in weight, which is critical for launching alone, but still has enough payload to carry a complete set of equipment. The body design is usually made of aluminum-magnesium alloy AMG or steel St3, which directly affects the durability and weight of the product. Understanding the real specifications of this model will help you make an informed decision about buying or building yourself, avoiding common mistakes of beginners.
Overall dimensions and weight parameters
The basis for understanding the operational qualities of any boat is its geometric data. Dive 21 Designed to provide maximum usable cockpit area with minimum hull length. Deck length is usually about 2.1 meters, which is reflected in the model name, but the full length with transom and forehead can vary depending on the manufacturer or drawing. The width in the midfield area is often 1.3-1.4 meters, which creates a very wide and stable platform on which it is difficult to lose balance even with sudden movements.
The height of the boat is a parameter that is often underestimated, but it determines the safety of being on the water in the wave. In this model, the board is raised by 35-40 cm, which is the optimal value for preventing a wave from being overwhelmed when two people are present. The weight of an empty boat depends on the thickness of the metal used: using a sheet of 2 mm, the weight will be about 35-40 kg, which allows you to carry it manually, but requires effort. If thicker metal is used to strengthen the bottom, the weight can grow to 50 kg, which already requires the presence of a wheeled trailer or the help of a partner.
- 📏 Length full: varies from 2100 to 2200 mm depending on the modification of the translance.
- 📏 The width is maximum: it is 1300-1400 mm, providing excellent stability.
- 📏 Height: 350-400 mm, which is enough for calm water and fine waves.
⚠️ Note: The actual weight of the boat may differ from the stated in the drawings by 10-15% due to the use of welds and the thickness of paint or anti-corrosion coating.
When choosing, it is important to take into account not only dry mass, but also displacement. The maximum load capacity of Nyrk 21 is about 250-300 kg.Exceeding this limit leads to a critical decrease in the height of the board above the water and loss of safety. For two adults of average build, the buoyancy margin remains acceptable, but placing three will already be extremely risky and uncomfortable.
Design features of the body and bottom
The main feature of the design is a flat bottom, which provides minimal draught, which allows you to approach close to the sloping shore, which is especially appreciated by anglers when catching fish or installing gear. However, the flat bottom has its disadvantages: at high speed, it creates a gleaming effect with a strong impact load on the spine of passengers when faced with a wave. speed-response This boat is limited and is not designed to navigate open reservoirs in windy weather.
The stern, which is the stern part where the motor is attached, is usually removable or reinforced. In factory designs, the angle of the kilvater (dadewood) is often fixed, but many owners prefer to make it adjustable to optimize the operation of the engine with different screws. The board can be straight or have a small blockage outwards, which adds additional volume and buoyancy. Welds that connect the sheets of the skin must be done qualitatively, since they are the ones who experience the greatest load when hitting the water surface.
The interior layout often includes harunduks or storage boxes built into the bow and aft, which are not only convenient for placing things, but also serve as additional elements of the rigidity of the hull. Bulkheads separating the compartments prevent the boat from completely flooding in the event of a hole in one of the compartments, although in the classic case of the boat, the shipyard is not only a small one of the two. Dive 21 Airtight compartments are rare, most often they are just open niches.
Capacity and load capacity in practice
The theoretical load capacity of 300 kg sounds impressive, but in practice, the distribution of this weight plays a key role. If you place all the cargo on one side, the boat can tip to dangerous levels. battery The fuel box was located along the diametric plane and closer to the boat's center of gravity, and passengers must also sit symmetrically so as not to disturb the trim.
For fishing together, there is enough space: two fishermen with gear, a cage and a small supply of food comfortably placed on banks. However, if you plan to spend the night with a tent or transport large cargo, it is better to consider larger models. banks (seats) are usually removable, which allows you to free up space for laying long objects, such as fishing rods or poles.
- 🎣 Comfortable loading: 2 people + engine 5 hp + 10 liters of fuel + tackle.
- 🎣 Limit load: 2 people + engine 9.9 hp + minimum stock of things (for calm water only).
- 🎣 Not recommended: accommodation of more than 2 people or loading over 300 kg.
⚠️ Warning: When installing a powerful motor (more than 6 hp) on a transom, be sure to use an anti-Trans plate or a lower unit extension to avoid cavitation and loss of traction.
Old, corrosion-thin metal may not be able to withstand the design load, so always check the case for hidden defects before the season. Water trapped in through splashes or rain also reduces the payload, so having a scoop or pump is a must.
Compatibility with outboard motors
Selection of engine Dive 21 The flat bottom does not allow high speeds without the risk of loss of control, so the best choice is motors with a power of 2 to 6 hp. Two-stroke motors are preferred because of the lower weight, which shifts the center of gravity back and facilitates the exit to planing. Four-stroke analogues will be heavier, which can lead to differentiation on the stern and reduce efficiency.
The height of the transom is usually S (381 mm), which is suitable for most short-dadewood engines. However, when fully loaded, the boat may squat and the standard height may not be enough, so having the ability to adjust the engine tilt or use slots will be a big plus. Electric motors are also a great option for quiet fishing, allowing you to move silently through the thickets of reeds without scaring the fish.
☑️ Check before installing the engine
Fuel consumption with a 5 hp engine is about 1.5-2 liters per hour on full gas, which allows you to make long trips on one tank, while the maximum speed rarely exceeds 20-25 km / h, which is enough to move between fishing points. Attempting to force the engine and squeeze more speed from the flat bottom will only lead to increased fuel consumption and shaking.
Manufacture materials and durability
The durability of the boat depends on the alloy chosen.AMG) It is practically corrosive, light and does not require painting, it is enough to keep them clean. However, aluminum is softer and when hit by a stone or a concrete pier, it can get a dent or even a crack, which is difficult to brew in the field without special equipment.
Steel boats (St3) is heavier and requires painting and maintenance, as rust is their main enemy, but steel is highly durable and resilient: it is more likely to bend than crack when impacted, and repair of the steel case is available even with simple electric welding. For many fishermen, it is the ability to quickly fix a hole in the garage or on the shore is a decisive factor in the choice of material.
| Characterization | Aluminum (AMG) | Steel (St3) |
|---|---|---|
| Body weight | Light (25–35 kg) | Severe (45–55 kg) |
| Corrosion resistance | High. | Low (requires protection) |
| Repairability | Difficult (need argon) | Simple (electric welding) |
| Term of service | 20+ years | 10-15 years (without care) |
The thickness of the metal also matters: it is recommended to use a sheet at least 2 mm thick for the bottom, and for the sides you can take 1.5-1.8 mm for weight loss.1 mm) is possible only for very small shuttle boats, and for full-fledged boats Dive It would be critically small and dangerous.
Transport and storage
One of the main advantages of the model is its compactness. With a length of just over two meters, the boat can be transported on the trunk of a light car, observing the rules of the road regarding overhangs. However, the weight of 40-50 kg makes it difficult for one person to climb the roof, so having strong guides or the help of a second person is necessary. A more convenient option is to use a light trailer where the boat can lie upside down or on the keel.
Storage of a metal boat requires certain conditions. Aluminum can be stored under a canopy or even under an awning outside, because the oxide film protects it from further destruction. Steel is better stored in a dry room or under a safe shelter, pretreating the places of chipped paint. In the winter, the boat is recommended to be turned upside down so that moisture and snow do not accumulate inside.
Secrets of Winter Metal Storage
Leave the boat outside for the winter, but be sure to turn it upside down and raise your nose and stern on the stands so that the bottom does not bend under its own weight and in the snow. Inside, put a bag of silica gel or quicklime to absorb moisture, this will prevent condensation and corrosion in the off-season.
For ease of movement along the shore, removable wheels are often installed or special carts are used, which eliminates the need to drag heavy metal with a drag, which is especially true when sandy or rocky terrain of the coastline. Remember to remove the wheels before descending to the water, so as not to damage the sides and create unnecessary resistance.
Comparison with analogues and modifications
There are many modifications and analogues on the market, such as Kazanka, Ob Or some other homemade thing, compared to Kazankoy-MDive 21 wins in width and stability, but loses in speed and seaworthiness due to the lack of a keel. Kazanka is more sharp-kneeded and better at cutting the wave, but it is already less stable in the parking lot, which is important for fishing.
Compared to similar-sized inflatable PVC boats, the metal-powered Leap loses in weight and storage compactness, but gains in reliability and impossibility of puncture. PVC boats are easier to drag into the trunk, but harder to tow over long distances without a special trailer, and more vulnerable to cuts on sharp objects in the water.
To improve driving performance on the Dive 21, you can install homemade zygomatic splash-offs or hydrofoil on the engine, which will slightly reduce yaw and improve the output for planing.
Modifications can be shaped differently in the nose: some versions have slightly raised nozzle, which improves the behavior on the wave a little. There are also tiller and remote versions, although for this length the tiller is the standard. The choice of a particular version depends on your personal preferences and operating conditions.
Frequently Asked Questions (FAQ)
Can I put a 10 hp engine on the Door 21?
Technically, it's possible, but it's not safe. Flat bottoms aren't designed for these speeds, the boat will become unstable in corners, and loading the transom can cause it to collapse. The maximum recommended power is 6 hp.
What is the optimal metal thickness for self-building?
For the bottom, it is better to take a sheet 2 mm thick (aluminum) or 1.5-2 mm (steel), the side can be made thinner - 1.5 mm to reduce the overall weight of the structure without losing strength.
Should I paint an aluminum boat?
Aluminum does not require painting to protect against corrosion, as it forms a protective oxide film, usually painted only for aesthetic purposes or for camouflage, using special soil paints for aluminum.
How many people can fit comfortably in a boat?
Comfortable, two people of average build, three of them will hardly fit, the boat will land heavily in the water, which will reduce safety and handling, especially if there is excitement.
Dive 21 is the ideal choice for quiet fishing on small rivers and lakes, where sustainability, reliability and the ability to approach the shore are important, rather than high speed.