Shallow waters, grassy ducts and wetlands have traditionally been considered difficult to access by traditional outboard motors. However, the advent of compact and powerful aeroplanes has dramatically changed the way we navigate in such conditions, opening new horizons for fishermen, hunters and rescuers. Installing an air propeller on an inflatable boat allows us to overcome areas where the propeller would instantly fail or wind a beam of algae.
Unlike traditional outboard motors, the aeroplant has no submerged rotating parts, making it an ideal solution for highly sensitive ecosystems, with no vibration in the water and minimal propeller wave allowing fish to be kept safe and move around near the coastline, while modern models have enough traction to plane even when fully loaded.
Before deciding to upgrade your boat, you need to carefully study the design features of such engines. air propulsion unit It's a complex unit that requires the right approach to mounting and balancing, and planning errors can cause unstable running or even damage to the boat's cylinders, so it's important to understand the physical principles of air thrust.
Principal differences and advantages of air traction
The main difference between an airplane and a classic engine is the way it creates jet power. jet-engine It repels the air, creating a powerful jet behind the stern, which allows the boat to move even when there is no water under the bottom, for example, when going to a gentle shore or moving on ice and snow.
One of the key advantages is the ability to use petrol-engine The absence of a lower unit and gearbox in the water reduces the risk of collision with underwater obstacles, rocks or driftwood, which often happens in narrow rivers.
- 🚀 High cross-country: the possibility of movement on water overgrown with grass, and shallow water with a depth of only 10-15 cm.
- 🛡️ Safety: The lack of high-speed parts in the water eliminates the risk of injury to people or animals near the boat.
- 🔧 Repairability: The engine and propeller are publicly available, making it easier to maintain and replace components.
However, you need to take into account the features of operation. Air propeller It creates a significant level of noise, although modern silencers and protective casings can significantly reduce it, and the effectiveness of the control depends on the quality of the steering column and the availability of keel water skis, which helps to keep the course.
⚠️ WARNING: When operating an aeroplant at high speeds in narrow spaces (between trees or reeds), the airflow from the propeller can damage surrounding vegetation or raise a dust cloud if you are near the shore.
Use an aeroplant with a screw in the protective ring if you plan frequent shore exits - this will prevent blades from chipping when accidentally touching the ground.
Selection of type of screw and protective fence
The central element of any aeroplant is the propeller, which determines the specifications of thrust, speed and noise level. For PVC boats, the most common two- or three-blade propellers are made of wood, composite materials or aviation aluminum. The choice of material affects the weight of the entire unit and the inertia of rotation.
The protective ring (skin) has a dual function: it protects the blades from damage when in contact with obstacles and prevents injury to people near the engine running. The design of the casing should be as aerodynamic as possible to minimize power losses on the vortices of air.
When choosing, pay attention to the pitch of the screw, which should correspond to the engine power and the expected loads. Too large a step on a weak engine will lead to inefficient operation, and too small will not allow you to reach maximum speed.
- 🪵 Wooden screws: have good shock absorbance, are easy to repair, but are afraid of moisture and require regular varnishing.
- 🏗️ Composite screws: light, durable, not afraid of corrosion, but with a strong impact can split, not bend.
- ⚙️ Aluminum screws: the most durable and heavy, ideal for working in difficult conditions where there is a high risk of contact with solid objects.
Effect of screw diameter on traction
Increasing the diameter of the propeller while maintaining the pitch increases static thrust, which is useful for heavy boats, but can reduce top speed due to increased air resistance.
Even a minimal imbalance at high revs will cause a strong vibration that will quickly destroy the transom fastenings and cause discomfort to passengers.
Requirements for PVC boat and transpranza design
The aeroplant has a higher requirement for the strength of the craft, and unlike a light electric motor, a frame-and-tank gasoline unit can weigh between 30 and 80 kg or more. turret boats must be made of plywood thickness of at least 12-15 mm and have a reliable reinforced frame.
Many PVC boat manufacturers offer models labeled "motor" or specially adapted transes for aeroplanes. If your boat is not designed for such loads, you will need to install additional reinforcement or use a remote transom that is attached to the sides and bottom, spreading the weight.
| Parameter | Standard transom | Reinforced transnec (Aero) | Takeaway transom |
|---|---|---|---|
| Plywood thickness | 9-12 mm | 15-18 mm | 15-20 mm |
| Max, load. | 50 kg | 100 kg | 120 kg |
| Type of attachment | To the cylinders | To cylinders + stringers | To the sides + bottom |
| Application | Small motors | Medium-sized aeroplant | Heavy units |
Special attention should be paid to the geometry of the bottom. For confident planing with an air propeller, the presence of a pronounced keel Or installing additional inflatable keels, which is a way to keep the course stable, because the aeroplant doesn't have a lower unit fin.
⚠️ Warning: Never install a heavy aeroplant on a boat's transom designed only for electric motors or low-power "electrics"; this can cause the transompane to deform and lose the tightness of the seams at a critical moment.
Installation and balancing of equipment
The installation process begins with careful preparation of the landing site, you need to make sure that the transom is located strictly perpendicular to the diametrical plane of the boat, any distortion will lead to the side of the vessel and uneven wear of the structure.
The motor frame must be fastened through vibro-insulating gaskets made of rubber or a special polymer, which will reduce the transmission of vibration to cylinders, which is especially important for the comfort and durability of the PVC material.
The critical step is to balance the center of gravity, and the engine must be set so that the thrust vector passes through the center of mass of the loaded boat, and if the motor is too high, the boat's nose will start to pick up, and if it is low, the boat will dig water.
- 📏 Measure the distance from the transom to the center of gravity of the crewed boat to determine the optical mounting point.
- 🔩 Use the grovers and the thread fixator when tightening the bolts, as the vibration of the engine can weaken any connections.
- ⚖️ Conduct a test run on land (shortly) to check for no frame beats and mounts.
☑️ Check before the first launch
After the physical installation, you need to check the control system, gas reverse cables (if any) or just gas should walk freely, without jamming, and the steering column should ensure that the air jet is confidently rotated at an angle of at least 30-40 degrees in each direction.
Operational features and management
Control of the boat with aeroplant has its own specifics, different from the driving of a classic motor boat. There is no effect of "resistance" of the screw against the water when cornering, so the turning radius can be larger, and the reaction to the steering wheel - more smooth and inertial.
When driving against wind or strong side waves, the boat can demolish, because the sailing structure is high. Experienced operators recommend using the technique of "re-chanting", slightly tilting the hull in the direction of turning for a sharper entrance into the turn.
An important aspect is the control of the engine temperature, which is often installed openly, and if you work at low speeds in hot weather, you can overheat, so you need to monitor the readings of the sensors or use thermometer stickers on the cylinder head.
The maximum efficiency of the aeroplant is achieved when entering the planing mode, when the bottom of the boat is in minimal contact with water, reducing resistance.The main skill for controlling the airship is a sense of inertia: you need to turn the steering wheel in advance, anticipating the reaction of the vessel, and not when you need a maneuver.
Aircraft engines, especially two-stroke or older four-stroke models, can be quite voracious, plan your route with a range in mind, and always have a fuel reserve in a separate, securely secured tank.
Maintenance and safety
Regular maintenance of the aeroplant extends its life and guarantees safety on the water. After each release, especially on overgrown or muddy areas, you need to clean the screw and protective net from dirt, down and algae.
The engine requires standard maintenance: replacement of candles, checking the air filter and the state of the fuel system. Since the engine operates in dusty conditions (especially when going ashore), the air filter should be checked and cleaned more often than a conventional outboard motor.
- 🧼 Wash the engine with fresh water after operating in salt water to prevent corrosion of metal parts.
- 🔍 Regularly inspect the condition of the screw blades for cracks and chips.
- ⛽ Use a fuel stabilizer if the boat is idle for more than a month to avoid clogging the carburetor.
The safety of the crew is the number one priority: all passengers should wear life jackets, and when driving, avoid sudden movements that can lead to a rollover, since the center of gravity of the aeroplant is often located high.
⚠️ Attention: It is strictly forbidden to touch a rotating propeller even after the engine stops until it stops completely. The inertia of a light aircraft propeller is high, and it can remain dangerous for several seconds after jamming.
Frequently Asked Questions (FAQ)
Can I install an aeroplant on a conventional PVC rowing boat?
Theoretically, you can, but you need to make a special remote transom, which will be attached to the stringers and sides, because the regular transmuter of the rowing boat will not withstand the weight and vibration of the engine, and you will also need to refine the bottom to improve driving performance.
What is the maximum speed achieved with the aeroplane?
Speed depends on engine power, boat contours and loads. On average, single and double boats with a 15-30 hp engine reach speeds from 40 to 70 km / h. Heavy models with powerful engines can reach 90 km / h.
How noisy is the aeroplane compared to a conventional engine?
The aeroplant is generally noisier because of the lack of water that extinguishes the sound of the exhaust and rotating screws, but the use of modern silencers, resonators and casings reduces noise levels to acceptable values comparable to powerful chainsaws in the distance.
Do I need to register a boat with an aeroplant in GIMS?
Registration is required if the engine power exceeds 8 kW (about 10.88 hp) or if the mass of the equipped vessel with the engine exceeds 200 kg. In other cases, registration is not required, but the right to operate a small vessel may be required.