In search of a budget-friendly and reliable solution for motorizing a small boat, many water-engineers are turning to engines originally designed for wheelchairs. electric-powered The wheelchairs are often more accessible than specialized boat counterparts with similar traction specifications. Buy a disabled motorYou need to understand the technical nuances of adaptation, the risks of operation in the aquatic environment and the real effectiveness of such units.
Using electronics and mechanics that are not designed for water requires a deep understanding of sealing and protection processes. In this article, we will discuss in detail which models are suitable for reworking, where to look for parts and whether it is worth the effort. battery-capacity And why a conventional motor-wheel can be a great alternative to a gasoline friend for quiet fishing.
The market offers many options, but not all of them are equally useful for a waterman. We will analyze the specifications, compare prices and consider the real-world experience. The standard voltage of such engines is often 24 or 36 volts.So this is a very specific way to build a traction battery, so let's dive into the world of electrifying your boat.
Why are motors from wheelchairs for boats considered
The main reason for this interest is the price-to-power ratio, and motors that are mounted on electric wheelchairs often have high torque at low speeds, which is ideal for moving a displacement vessel. electric It does not require a complex transmission and allows you to move silently without scaring the fish.
In addition, the modular design of many wheelchair drive systems makes it relatively easy to remove the engine itself, often made with a gearbox that is easy to adapt to the propeller. IP protection These nodes are usually designed for rain and splashing, but not for full immersion or work in salt water.
Another advantage is the availability of spare parts, and because wheelchairs are mass-produced, it is easier to find a controller or motor than a rare outboard motor, but there is a downside: the life of the boat hull in constant vibration and high humidity can be significantly lower than the manufacturer's stated wheelchair.
- 💰 Budget savings: The cost of a used motor from a wheelchair is often 3-4 times lower than the price of a new boat electric motor.
- 🔋 Energy efficiency: Modern DC (DC) or BLDC (BLDC) motors have high efficiency.
- 🛠 Simplicity of construction: A minimum of moving parts makes it easier to maintain and repair in the field.
Technical specifications and compatibility
When choosing an engine, you need to pay attention to its rated power and operating voltage. Most often there are models of 250, 350, 500 and 700 watts. power of 350-500 WIf you plan to transport goods or move against the current, it is worth looking for more powerful units.
The most important parameter is the type of engine, which uses a geared and brushless (BLDC) collector motor, the latter preferable for a boat, since they do not have brushes that can spark and require replacement. Brushless engine It is quieter, more durable and more efficient, although it requires a more complex controller.
Special attention should be paid to the cooling system. Wheelchair engines are usually cooled with air. When installed on a boat, you need to provide air to the engine body or organize water cooling, which is already a difficult engineering task. Overheating of the windings is the main reason for failure of such alterations.
For a boat, choose engines with a metal gearbox body - plastic can not withstand vibrations and impacts on water at speed.
Rotor compatibility is a separate topic. The shaft of the wheelchair engine is rarely suitable for a standard boat propeller, you either have to drill the shaft or make an adapter, and it is also important to consider the direction of rotation: many boat propellers have a specific sharpening of the blades for a certain rotation.
⚠️ Attention: Never use engines with open vents without additional protection, and even a small amount of water entering the windings will short circuit and fire.
Where to find and buy a used engine
Finding the right machine is a challenge, and the main search sites are bulletin boards and forums, and people often sell the whole thing because of a health change or a breakdown in the electronics, and the mechanical part might be ideal.
When buying from hand, be sure to check the engine under load. Visual inspection may not reveal wear of brushes or bearings. Ask the seller to demonstrate the operation of the motor by connecting it to the battery. Pay attention to extraneous noise and heating of the body.
Also worth considering is buying new Chinese-made engines, which are sold as wheelchair parts. ZY1020 These motors are inexpensive and have a warranty, unlike the used variants.
Secrets of searching on avito
Use the "e-wheelchair" search, "wheelchair engine," "wheelchair drive" search, and often the sellers don't specify power in the title, so you have to open every ad.
And remember, the medical equipment stores, they sometimes have decommissioned models or they can order the engine separately, and the price will be higher, but you get a device with a known history.
Comparison of popular engine models
The market is dominated by several main types of drives, which are most often in the hands of boaters, and to make it easier for you to navigate, we have compiled a comparison table of specifications of popular models.
| Model/Type | Power (W) | Voltage (B) | Type | Features |
|---|---|---|---|---|
| PG1020 | 250-350 | 24 | Collector's | Massive, reliable gearbox |
| ZY1020 | 350-500 | 24/36 | Collector's | Popular, lots of spare parts. |
| GBM (BLDC) | 400-800 | 24-48 | Brushless | High efficiency, requires a controller |
| Thomas | 300-600 | 24 | Collector's | German quality, dear. |
Model PG1020 It's a heavy, but very thrustful motor, great for heavy boats, but it can be a problem when it's mounted on a transom. GBM The interesting thing is that this is a ready-made motor-wheel, which can be used as is, adapting the mount.
When choosing between a collector motor and a brushless motor, weigh your skills. Collector motor is easier to operate (easy enough board), but requires maintenance. Fragmentless motor is difficult to adjust the parameters of the controller, but then does not require attention for years.
☑️ Checking the engine before buying
Features of installation and sealing
The most critical thing is the engine's adaptation to water. The standard body of the wheelchair is not waterproof. You'll need to make or buy a sealed box. Often, you use large diameter PVC pipe clippings or aluminum profiles.
The engine shaft must go out through the oment or cuff. Using a simple seal is not enough - when working, the shaft heats up and expands, which can violate the tightness. slurry-knot from automotive pumps or specialized marine components.
The engine's attachment to the lower unit leg must be rigid, the propeller's vibration is transmitted to the engine body and can break the mounts or damage the winding. Use vibratory gaskets, but make sure they do not disturb the alignment of the shafts.
⚠️ Attention: When sealed, condensation can form inside the box due to temperature changes. Be sure to provide a ventilation hole with a hydrophobic filter or use silica gel inside the case.
The engine uses a controller to control the revs, and it also needs to be sealed separately or placed in the dry handle of the boat, because the electronics are more afraid of moisture than the motor itself, and the wires must be in high-quality insulation, resistant to ultraviolet light and salt water.
Selection of the battery
The disabled engine is only half the equation. The other half is the power source. Standard car starter batteries (AKBs) are not suitable for long-term operation. You need to have a power source. traction Deep Cycle, which can give energy to small currents for a long time.
The most popular gel (GEL) and AGM batteries are safe, maintenance-free and well-charged, but their main enemy is a deep discharge below 10.5-11 volts. Lithium-iron-phosphate (LiFePO4) batteries are more expensive, but 2-3 times lighter and last 5-10 times longer.
When calculating capacity, use the formula: Current (A) × Time (h) = Capacity (Ah). For example, a 500 W 24 V motor consumes about 25 Amps. For 4 hours, you need 100 AH. But this is ideal. In practice, in order not to kill the battery, you need to increase the stock by 30-40%.
- 🔋 Lead acid: Cheap, heavy, afraid of deep discharge.
- ⚡ LiFePO4: Expensive, lightweight, long life, require BMS.
- 📉 Capacity: Always take with a margin, the real capacity falls in the cold.
Remember the charging system. The charger must match the type of battery you have, charging lithium with a lead charger can cause fire, and the gel can be boiled with the wrong voltage.
Frequently Asked Questions (FAQ)
How many kilometers will the boat travel on one charge with the engine from the wheelchair?
The distance depends on a variety of factors: boat weight, wind strength, current and engine mode. On average, a 500 W engine kit and a 100 Ah (24V) battery will allow you to travel about 15-20 km in quiet mode (3-4 km / h). At full power, the reserve is reduced to 8-10 km.
Can you use this engine in salt water?
You can use it, but the risk of corrosion increases many times over, aluminum shells and steel shafts rust very quickly, requires enhanced corrosion treatment, use of anodic protection and thorough freshwater washing after each fishing.
Do I need to register a boat with such a motor in the GIMS?
Under current Russian legislation, boats with an engine capacity of more than 8 kW (about 10.8 hp) are subject to registration. Wheelchair engines usually have a power of up to 1 kW, so registration and rights to them are not required if the total weight of the curbed vessel does not exceed 200 kg.
Which screw is better to choose for reworking?
For low DC engine speeds (usually 2,000-3000 rpm per shaft, but after the gearbox is smaller), larger pitch and diameter propellers are better suited. However, the exact selection is done experimentally. Start with a universal propeller with a diameter of 8-9 inches.