Purchase or self-manufacture boat-trailer And that's only half the story, because the comfort and safety of loading depends on the lifting mechanism installed. The hand winch is, of course, time-tested and inexpensive, but imagine this: you're alone in a pond, there's a strong wind, and a heavy boat with an outboard motor needs to be tightened onto the kilblocks. winch It is not just a luxury, but a necessity that preserves your strength and nerves.
The current market offers many solutions, from compact models for light PVC boats to powerful systems for heavy metal boats. Choosing the right equipment requires considering many factors: the weight of the vessel, the angle of the pad and the capacity of the tractor battery. Planning errors can lead to a breakdown of the mechanism or, worse, to an emergency on the slope near the water.
In this article, we will discuss in detail all aspects related to the electrification of your trailer. tractionWe will also look at the nuances of installation that are often overlooked by beginners, but which are critical to the durability of equipment.
Calculation of traction force and power selection
The first thing that any trailer upgrade project starts with is determining the power required. Many people mistakenly believe that the winch should just pull the weight of the boat, but the physics of the process dictates more complex conditions. The load on the mechanism depends on the friction coefficient, the elevation angle and the condition of the lossent surface. For light inflatable boats, 500-700 kg is enough, whereas for heavy aluminum hulls with powerful engines, this parameter can reach 2000 kg or more.
The key parameter here is tractionHowever, it is worth remembering that the maximum load is only relevant for the first row of turns on the drum. As you wind the rope, the radius of rotation increases, and the real thrust drops by about 10-15% with each subsequent layer. So always choose a device with a power reserve of about 20-30% of the mass of your vessel in running order.
⚠️ Attention: Never use a winch with a force equal to the weight of the boat as the only stopper element. After tightening, be sure to lock the vessel with belts, as the mechanism may have a backlash or not ensure the tightness of the braking system.
There are two main types of gearboxes used in winch-shoreWorms and planetary gearboxes are highly efficient and self-braking, making them ideal for holding loads without constant tension. Planetary gearboxes are smaller and faster, but require an additional mechanical brake to prevent the drum from unwinding under load.
Design features and types of cables
Once you have determined the power, you have to choose the type of traction element that will directly contact the boat, which has traditionally been steel cables, but in recent years, synthetic materials have been taking over the market. Synthetic cable High molecular weight polyethylene (Dyneema) is safer, lighter and corrosive, which is critical for use in salt water.
Steel cable, in turn, has high temperature resistance and resistance to abrasion against stones or concrete. However, it requires regular lubrication and inspection for "shagginess." When the steel cable breaks, tremendous kinetic energy is released that can cause serious injury to the operator, while synthetics fall to the ground when they break.
An important element of the design is the free-route mechanism, which allows you to quickly unwind the cable without running the engine. quick releaseThis is activated by turning the handle or switching mode, which speeds up the preparation process for launching the boat, which is especially valuable during peak hours on popular water bodies.
When using a synthetic cable, be sure to install a heavy tarpaulin cover or load at the end. In the event of a cable rupture, this will prevent it from rebounding and possible injury to people nearby.
Technology of installation of winch on trailer
Installing an electric winch requires careful preparation of the seat. Most modern trailers have a universal platform, but sometimes you have to make an additional bracket from a profile pipe. The main rule of installation is that the axis of the drum should be strictly perpendicular to the longitudinal axis of the trailer, and the cable itself should descend on the drum smoothly, without distortion.
The fastening is carried out using high-strength bolts of class 8.8 or 10.9. The use of conventional hardware is unacceptable, since vibration when driving on the highway can weaken the connection. Grover washers are necessarily installed under the nuts or a thread fixator is used. Before the final puff, check whether the winch body touches the elements of the frame when working.
Pay special attention to the installation lock It has to be positioned at the same height as the drum so that the rope is wound evenly across the width, so that if the lock is too high or low, the turns will begin to layer on each other, which will lead to jamming and damage to the braid.
☑️ Control of winch installation
Connection scheme and power supply
Electric winch is one of the most energy-intensive consumers on a trailer. Standard car wiring, going to the dimensions, will not withstand such currents. To connect, you need to lay a separate line from the tractor battery, using wires with a cross section of at least 16 mm2, and for powerful models – 25 mm2 or more. The use of thin wires will lead to a voltage drop and overheating of the insulation.
A powerful fuse or circuit breaker is required to be fitted to the circuit break, which is designed to accommodate the current consumed by the winch in the running mode. This is usually 150-300 Amps. The fuse should be placed as close as possible to the battery to protect the entire circuit area. The best control is to use a remote control with a cable of sufficient length (5-7 meters) so that the operator can control the loading process while in the safe zone.
Some owners install an additional trailer deep-dischargeThis solution is justified if you often use a winch with the car engine shut down. The car's starting battery is not designed to give long-term high currents and can quickly fail. The additional battery is connected via a diode insulator or interchange relay, which allows both batteries to be charged from the generator while driving.
Connection diagram:[Battery] --> [Fuse 200A] --> [Relay/Contactor] --> [Swan]
|
[Body mass/frame mass]
⚠️ Attention: All the connections in the power circuit must be protected from moisture, use adhesive shrink tubes and special sealed connectors, and getting water on the contacts under high current will cause instantaneous oxidation and heating.
Comparison of specifications of popular models
To make the choice easier, let's compare the technical parameters of a few typical marketers, and the table shows the data for the mid-range models that are suitable for most amateur boats.
| Parameter | Model A (Budget) | Model B (Medium) | Model C (Premium) |
|---|---|---|---|
| Traction force | 1350 kg | 2000 kg | 2700 kg |
| Engine power | 1.2 kW | 1.8 kW | 2.5 kW |
| Type of gearbox | Worm | planetary | Planetary 3 stupa. |
| Speed (no load) | 3.5 m/min | 12 m/min | 15 m/min |
| IP protection | IP44 | IP67 | IP68 |
As you can see from the comparison, the difference in speed can be tenfold. Planetary gearboxes They allow for a high sampling rate, which saves time, but worm mechanisms are often more reliable in long-term load conditions and less demanding to maintain.
When choosing, you should also pay attention to the protection class. IPFor a boat trailer, IP54 is the minimum permissible, but it is better to look for models with an IP67 or IP68 index, which guarantee complete leakproofness even during short-term immersion during the boat descent.
The secret of the durability of the motor
Many users are unaware that the electric motors of winches are cooled by air that they suck through the vents themselves. If you work in dirt or dust, periodically blow the case with compressed air to prevent windings from overheating.
Operation and maintenance
The long life of the equipment depends not only on the quality of the installation, but also on the proper maintenance. After each trip, especially on salt water, the mechanism must be rinsed with fresh water. The salt aggressively affects the metal and electrical contacts, quickly disabling them. Don't be lazy to wipe the case and cable with dry rags.
Check the condition of the fasteners regularly. Vibration is the main enemy of all mechanical connections. Once a season, it is recommended to remove the protective casings and check the condition of the electric motor brushes (if they are serviceable) and the level of lubrication in the gearbox.
Watch the rope. If it's not wound well, the coils can slip through and get damaged when moving through irregularities. hook fixed in a special nest on the trailer's breather, and the cable itself is pulled.
Regular fresh water washing and checking the rope tension prolong the life of the electric winch by 2-3 times, preventing corrosion and mechanical damage.
Don't forget to be safe. Never stand in the wing of a strained cable, if it breaks or if it jumps off the hook, the trajectory will be in that direction, and keep children and animals away from the working mechanism.
Can I use a car battery for a winch without an additional one?
Yes, if the car's engine is running, the generator can compensate for the current consumed by the winch, but if the engine is turned off, the starter battery can run to a critical level in several cycles, after which it will be impossible to start the car.
Which cable is better: steel or synthetic for fishing?
For fishing and resting on the water, a synthetic cable is definitely better: it does not rust, does not rust hands and clothes, is safe when a cliff is broken and does not drown in water, which makes it easier to find it in the event of falling overboard.
Do I need to lubricate the synthetic cable?
You can't lubricate it with oil or solidol, because you stick sand and dirt, which will work like an abrasive. To care for synthetics, there are special sprays that clean out dirt and create a water-repellent layer, or just wash it with water with soft soap.
Why does the winch warm up when working?
The winch motors are designed for short-term operation (usually 1-2 minutes of continuous operation). If you run for long periods of time in 100% load mode, they inevitably heat up. Let the mechanism cool down, taking breaks, especially in hot weather.