The modern market of small boats offers many solutions for lovers of water walks, however, boat Stripe It's not just another modification of a classic PVC boat or a traditional metal boat, it's a full-fledged one. jetboatThe concept of propulsion of an inflatable vessel's hull by jet water has long been considered a part of experimental designs, but it was Strige who made this technology available and serial.
The main feature that highlights Stripe The competition is the complete absence of protruding underside parts. You won't find the usual propeller, the lower unit or the complex system of shafts that run through the hull. The entire propulsion system, including the internal combustion engine and the water jet pump, is located inside the cockpit or in a special rund, which dramatically changes the approach to safety and patability in shallow water. For anglers and hunters, whose routes often run through grassy ducts and rocky ridges, this becomes a decisive argument for buying.
It's important to understand that driving a boat like this requires a different kind of habituation than the classic "motor" driving style, and there's no screw-driven effect, and braking is done by the reversible steering of the jet drive. The uniqueness of the design of the swift is the integration of the water jet plant directly into the inflatable balloon or transom plate, which allows you to reach speeds of up to 40-50 km / h with minimal draft. In this review, we will analyze in detail the device, advantages and nuances of the operation of this unusual boat.
⚠️ Warning: Water jet boat operation requires strict adherence to water intake rules. Never start the engine out of the water or with the inlet of the water intake blocked even for a few seconds - this is guaranteed to overheat and deform the impeller impeller impeller.
Design features and device of jet drive
Basis of reliability boats Stripe Unlike outboard motors, where torque is transmitted through a long shaft to the propeller, it uses the principle of jet propulsion, which is sucked through a special hole in the bottom (water intake), passes through the pump and is ejected under pressure through the nozzle in the aft, which makes the boat virtually unsinkable in the classical sense, since the hull has no through holes below the waterline, except the water intake channel itself.
The heart of the system is often adapted engines from snowmobile or motorcycle equipment, such as: Rotax analogue Yamaha and SuzukiThey are very compact and powerful, and the water-gun propulsion system is attached to the transom or integrated into the inflatable cylinder with reinforced PVC fabric and special metal flanges. Tightness connection is provided by a multi-stage system of adhesive seams and additional mechanical fixers that exclude backlash at high speeds.
The steering system is particularly noteworthy: the steering is done by rotating the exit nozzle through which the water jet is ejected. The reverse uses a special deflector flap that lowers and redirects the jet forward, pushing the boat backwards, which allows you to maneuver in a limited space with an accuracy not available to propeller boats.
Technical nuances of the water intake
The design of the Strizh water intake has rounded edges and a protective grid that not only filters large debris, but also structures the flow of water, reducing cavitation at the pump entrance, which is critical to keeping the efficiency of the jet drive at low revs.
The materials used in manufacturing also play an important role. Cylinders are made from five-layer reinforced fabric. PVC density of at least 1100 g / sq.m., resistant to abrasion and exposure to fuel. NDMA (low pressure inflatable floor) or is equipped with rigid aluminum or composite inserts to improve hydrodynamics and the ability to install a water jet column without deflection.
Advantages of water jet traction over screw analogues
Why? boat Stripe The answer is a combination of safety and patency factors that are not available to traditional solutions. The first and foremost advantage is absolute safety for swimmers. The absence of a rotating screw under the bottom allows people or animals to swim up to shore without risk of injury.
The second key is cross-countryness, and the jet drive can operate at depths where a screw motor would have hit a rock long ago or wound grass. Stripe It can move confidently in water only 15 to 20 centimeters deep, allowing it to navigate shallow rivers, overgrown delta ducts, and coastal areas with abundant aquatic vegetation, and the grass that instantly wraps the screw simply oozes through the water jet pump without causing any loss of power.
- 🚀 High maneuverability: The possibility of turning almost in place and moving sideways when using lateral traction (on some modifications).
- 🛡️ Protection of the mechanism: All moving parts are hidden inside the pump housing, which excludes impacts on underwater obstacles and hooks by nets.
- 🌊 No cavitation on the propeller: Reduced noise and vibration levels compared to high-speed propeller motors, which is important for comfortable fishing.
It is also worth noting the durability of the engine. Since the water jet propulsion system creates a constant load and does not allow for sharp surges in speed, characteristic of "gassing" on the propeller, the power plant life paired with the power plant. A haircut. And the lack of a lower unit reduces water resistance, allowing high speeds even with medium-power engines, although the efficiency of a jet drive at low speeds is still inferior to the propeller.
Technical specifications and speed indicators
When choosing boats Stripe The actual speed of a vessel depends on many factors: engine power, loading, water surface condition and hydrodynamics of a particular hull. On average, boats of this type with an engine of 50-60 hp can reach speeds from 35 to 45 km / h. These are quite decent figures for an inflatable vessel, comparable to planing boats of the same class.
Fuel consumption is a separate topic to discuss. Water-gun systems tend to be more voracious at cruising speeds than screw-like counterparts of the same power, as some of the energy is lost to friction of water inside the channel and in the pump. However, when you consider the flow rate per passenger seat or tonnage, the efficiency is equalized. For engines of 500-600 cubic meters, the average flow rate is about 15-20 liters per 100 kilometers when driving half-power.
| Parameter | Meaning / Description | Note |
|---|---|---|
| Maximum speed | up to 50 km/h | Depends on modification and load |
| Minimum depth of travel | 15-20 cm | No risk of damage |
| Type of engine | two-stroke / four-stroke | Usually Rotax, Yamaha, Suzuki |
| Load capacity | 300 - 600 kg | Depending on the size of the boat |
| Material of cylinders | PVC 1100 g/sqm | Reinforced fabric |
It is important to bear in mind that plane-out Water jet boats are a little bit later than propeller boats, and this is due to the inertia of the water in the channel and the thrust, and to facilitate this process, it is often recommended to use high-torque engines at low revs or special hydrowings on stabilizers, if the transom design allows.
Operation and management of the boat Strizh
Management jetboat It's a very different kind of gas-reverse, and there's no neutral transmission in the classical sense, either moving forward (open valve) or slowing back (closed) and the steering wheel is only on the move: if you drop the gas, the boat loses control, because the flow of water that rotates the steering gear disappears, and this requires the driver to maintain thrust continuously even when maneuvering at the berth.
The engine start process also has its own peculiarities: before starting, you need to make sure that the water intake is completely submerged in water. Dry passage for the water pump is disastrous. After starting, you should let the engine warm up at idle speeds, controlling the presence of a jet of "control" water output, which indicates normal circulation in the cooling system.
☑️ Preparation for the waterway
Wave-driving boat Stripe It is predictable, but flat bottoms (which are common in many inflatable models) can cause hardness on the oncoming wave. Experienced drivers advise you to walk at an angle to the wave or slow down when you have a strong chop. Also, it is worth remembering that the jet drive is less effective in sharp rolls, when the water intake can capture air, which leads to a disruption of the flow and temporary loss of traction.
⚠️ Warning: When reversing, be extremely careful. A jet of water thrown forward can lift bottom sediments, debris or sand that will fly directly into the cockpit, splashing passengers and equipment.
Maintenance, repair and winter storage
Despite the seeming simplicity, jet-plant After each water drop, especially in salty or polluted water, the system must be washed with fresh water, a special connection is provided to which the hose is connected, and the flushing helps remove sand, silt and salt, preventing corrosion of the metal parts of the pump and engine.
Regular inspection is required for the condition of the impeller, even small chips on the blades can significantly reduce the efficiency of the jet drive and cause vibration. boat Stripe The engine is usually accessed through a removable seat or a special hatch in the cockpit, which facilitates the routine work on replacing candles, filters and oil.
Winter storage requires complete preservation. The engine must be preserved according to the manufacturer's instructions (usually oil treatment and fuel stabilization). The boat itself should be washed, dried and folded into a case, avoiding overburdens at the place of attachment of the water jet. PVC materials are afraid of ultraviolet light and extremely low temperatures when folded improperly, so it is recommended to fold the boat at plus temperature.
To extend the life of the jet drive, install a removable stainless steel filter on the inlet hole of the water intake, which will protect the impeller from large stones and branches that can damage the blades if accidentally touching the bottom.
Comparison with analogues and final conclusions
Comparative. boat With classic PVC boats under an outboard motor, we see a clear advantage in safety and terrain, but some loss in efficiency and top speed. However, for specific tasks — flying, fishing in shallow water, rescue operations or just a safe family vacation with children — there are almost no alternatives to water jet propulsion, competitors such as boats with Tohatsu or Yamaha propellers can not offer this level of propulsion protection.
When considering the cost of ownership, the initial investment in Stripe However, the lack of need to buy an expensive propeller engine (because cheaper snowmobile engines or converted motorcycles are used) and less resource expenditure for repairs after encounters with driftwood can compensate for the difference in price in the long run.
In conclusion, it may be said that boat Stripe It's a choice for those who value functionality and safety above record speeds, a tool that allows you to get where others are afraid or unable to go, and its unique combination of inflatable hull and jet propulsion makes it an indispensable tool in challenging waters.
The boat Strizh is the optimal solution for shallow waters and overgrown reservoirs, where safety and permeability are more important than maximum speed and fuel economy.
Frequently Asked Questions (FAQ)
Is it possible to go to the big water (reservoirs, sea) on the boat Strizh?
There are limitations to accessing large waters. The inflatable hull and water jet propulsion are not designed for open sea waves of more than 0.5-0.7 meters. On large reservoirs, you have to be prepared for the fact that with strong winds, handling can deteriorate and the range will be limited by fuel consumption. For calm large lakes and rivers, the boat is perfect.
What gasoline should I use for the engine on the boat?
The fuel type depends on the engine installed. For two-stroke snowmobile engines (e.g. Rotax), an AI-92 or AI-95 gasoline blend is used with a special oil for two-stroke engines in a ratio of 1:50 (or according to instructions). For four-stroke engines, pure AI-92/95 gasoline. Always use fresh fuel and quality oils.
What to do if the jet drive stopped pulling?
The decrease in traction is most often caused by the entry of a foreign object (rag, algae, fishing line) into the jet drive channel or on the shaft of the impeller. You need to turn off the engine, inspect the water intake and, if necessary, remove the protective grate or the housing for cleaning.
How hard is it to drive a boat without a screw?
It takes 15 minutes to an hour of active practice, and the rule is that the boat only listens to the steering wheel when there is traction, when idling, the steering wheel doesn't work, you have to smoothly close the reverse valve to stop, and when you turn, you have to add gas when you change the steering wheel, and after a short workout, it becomes reflex.