The Russian small aluminum fleet is represented by many models, but Scaffle 350 It's not just another Kazanka or Ob, but a project that has been proving viable for decades because of its simplicity and accessibility, and owners value this boat for being self-made by drawing and low cost of ownership.
But despite the age of the structure, interest in it is not fading, and many fishermen and hunters are looking for information on how to improve the performance or adapt the classic body to modern engines. Stingray 350From factory specifications to the nuances of independent construction.
In this article, we will not use template phrases, but will look at real technical solutions. modernization It really changes the behavior of the boat on the water.
Technical specifications and construction of the body
Basis of reliability Stingray 350 The classic length is 3,500 mm, the width of the mid-spangout is 1380 mm, and the height of the board is 450 mm. These dimensions allow you to carry up to three people with a load, although formally the carrying capacity is often limited to 250-300 kg.
The bottom of the boat is keeled with a pronounced zygomatic bend, and it's not just a decorative element, but an important detail that ensures course stability. The angle of keeliness on the transom is usually about 8-10 degrees, which allows you to confidently pass the wave compared to flat-bottomed counterparts.
⚠️ Attention: When building yourself, strictly monitor the thickness of the metal. Using sheets thinner than 2 mm for the bottom will lead to rapid deformation and a decrease in the life of the case.
The weight of an empty boat varies from 60 to 70 kg depending on the equipment and thickness of the rolled car, and it often requires additional effort or winch to transport on the roof of a passenger car, as the car is not very comfortable. aluminum-alloy It is light, but in such dimensions it becomes weighty.
The design of the transom is traditionally reinforced with linings, which allows you to install outboard motors with a capacity of up to 10-12 hp However, with. without serious alteration of the aft part.
Driving and handling
On the water. Scaffle 350 It behaves predictably, but adjusted for the classical scheme. The boat does not plan at low power, and planing occurs at a speed of about 18-20 km / h. To enter the mode, you need a motor with a power of at least 5-6 hp with a correctly selected propeller group.
Low speed control is excellent because of the keeled bottom, which holds its course well, but when you go against the wave at high speeds, you can hit the water, known as goat, if the center of gravity is shifted too far back. ballast The nose is often needed.
- 🚤 Gleaning occurs stably when loading 1-2 people and a motor from 6 hp.
- 🌊 The exchange rate stability is high, but constant monitoring of the passenger's position is required.
- ⚓ The precipitation is minimal, which allows you to approach the gently sloping banks without the risk of damaging the body.
Many owners complain of yawing in the side wind, which is a feature of a narrow body, and this solves the problem by installing additional zygomatic linings or increasing the area of the lower unit engine.
Modernization and tuning of the Scata 350
The classic design is not perfect, and enthusiasts have been making design changes for decades. hydrocompensator (hydrowing) on the motor, which allows you to go out earlier on planing and save fuel.
The second phase of the upgrade is the redesign of the cockpit, and the standard cans are often replaced with soft seats with handdukes, and the transom is reinforced under more powerful engines. control-console It's a windshield that changes ergonomics.
Should I put the engine 15 hp on the ray 350?
The 15 hp engine is only possible after the transom is strengthened and the center of gravity is moved, and without further refinement, it will cause the nose to bury in the wave and reduce safety, and the optimal balance is 8-10 hp.
An important element of tuning is the installation of inflatable tubes on the sides. stingray It's a semi-inflatable vessel, which increases stability and protects the sides from impacts on the dock or ice, but it increases sailing and weight.
☑️ Scat's modernization plan 350
Independent construction: drawings and materials
For those who decide to build a boat DIY, the key is the choice of material. AMG5M or AMG6M The steel is 2 mm thick for the side and 3 mm thick for the bottom, and the use of steel is strongly discouraged due to corrosion and weight.
Drawings Stingray 350 They are available online, but they need to be adapted to the existing sheet material to minimize waste, and they are made with an electro-cloak with a file on metal or a Bulgarian, but the latter requires caution not to overheat the edges.
| Body element | Recommended thickness (mm) | Alloy mark | Note |
|---|---|---|---|
| Dough | 3.0 | AMG5M | Maximum load zone |
| board | 2.0 | AMG5M | Core set |
| Tranza | 4.0 - 5.0 | AMG6M | Reinforced package |
| Deck/Banks | 2.0 | AMG5M | With anti-slip coating |
Welding should be done by argono-arc method (TIG) using a filler material of the same brand. The quality of the seams is a critical safety factor. After welding, compressed air and soap solution must be pressed.
When welding aluminum, use graphite or ceramic linings under the seam - this will provide the perfect procoil on the back side without the need to clean the seam root.
Maintenance and storage of the boat
Aluminum doesn't rust like steel, but it's susceptible to electrochemical corrosion, especially in salt water. Scaffle 350 It is advisable to rinse with fresh water, washing off salt and pollution.
Winter storage is best arranged in an inverted position under a canopy or indoors. Direct sunlight is not terrible for metal, but can damage painting and wooden elements (banks, transom pad) if not treated properly.
- 🔧 Regularly check the condition of welds for cracks, especially in the area of fastening of the transom.
- 🎨 Once every 2-3 years, update the paint coating to preserve the aesthetic appearance.
- ⚓ Check the bottom for dents after pulling ashore.
Pay special attention to the contact points of dissimilar metals. If you have installed steel cleavers or fasteners, isolate them from the aluminum casing to avoid galvanic pairing.
Comparison with analogues: Scat or Kazanka?
The eternal beginner question: what to choose? Kazanka (especially the 2M, 5M) is often spacious and has more developed contours, but it is heavier. Scaffle 350 It is advantageous in compactness and the possibility of transportation on a trailer or even on the trunk of a powerful car.
Kazan 2M requires a 12 hp motor for comfortable planing of two, whereas Skat can confidently go on the "five" with one person. stingray It is a more economical option for solo fishermen.
⚠️ Attention: Don't compare the load capacity of these boats directly. The 350 is more of a single boat with the ability to take a passenger, whereas Kazanka was originally designed as a family boat.
If your budget is limited and welding skills allow, building the Skata will cost 2-3 times less than buying a used Kazanka in good condition, but the time spent on building it is also a resource to consider.
The choice between Skat and Kazanka depends on the use scenario: for frequent trips of one fisherman with a small engine, Skat 350 is more economical and maneuverable.
Frequently Asked Questions (FAQ)
What is the maximum weight of the motor to be put on the ray 350?
The standard is designed for 10-12 hp (about 35-40 kg). Installation of a more powerful engine (15 hp and above) requires serious strengthening of the transom, changing the weighting and possibly installing hydroelectric structures, as the stern will begin to burrow.
Do I need to register Skat 350 in GIMS?
According to the current legislation of the Russian Federation, boats weighing less than 200 kg and with an engine power of less than 8 kW (10.88 hp) are not subject to registration. The ray 350 usually weighs about 70 kg, so with an engine up to 10 hp registration is not required.
Can you use the 350th ray in winter for winter fishing?
Yes, aluminum boats are often used as a platform for winter fishing on ice, but remember that the metal becomes more brittle in the cold, and hitting ice or rocks can lead to cracks, and the metal cools down quickly, so you need mats.
Where to find the actual drawings for construction?
Original Soviet-era drawings can be found in technical literature or in specialized powerboating forums, and it is important to look for versions with dimensional chains retested by modern builders.