How to make a boat motor from a trimmer or a screwdriver with your own hands. Creating a homemade electric motor for a boat

trimer electric motor

Perfect for this purpose and trimer. The process of creating a motor when using this device will be significantly lightened. The only thing that the master will need to do is shorten the length of the device and attach a screw to it. There is no need to mount the gearbox.

There is also no need to modify the control and the system responsible for powering the motor. The only difficulty that may be encountered on the way is the problem of attaching the device to the boat. Especially for inflatables. But it is also resolvable.

As an electric motor, you can use units that operate windscreen washers, or a simple electric motor. IN last case power supply may be difficult, since standard motors operate on an alternating voltage of two hundred and twenty volts. The problem is solved by installing an inverter.

Thus, the owner of the boat can create an electric motor for the boat with his own hands. You don't need any special skills for this. Should only be purchased necessary materials and prepare some tools. It is recommended to use a drill with a power of more than one hundred and fifty watts as a motor. This indicator will allow you to move on a boat as if standing water, as well as along the river.
In addition to a drill, you can use a trimmer or a conventional electric motor. Another option is an electric motor based on a screwdriver. Such a device is cheaper to maintain, however, there may be problems with the speed of movement of the floating craft.

Probably everyone who lives in countryside or comes there to rest for the summer, has a boat or dreams of one. This is understandable, because spending time on the water is the most desirable and most wonderful vacation.

Boating is a great sport as it strengthens the muscles in your arms and back. Another thing is that, sitting on the oars, it is difficult to pay attention to all the beauties of nature, especially if the rower is inexperienced. Yes, and it is unlikely that you will be able to catch a fish - only if you anchor.

Not to mention the fact that the elderly or those who have health problems will get tired very quickly and will not be able to swim far.

But this does not mean that you need to refuse to walk along the river or always take a partner with you to facilitate movement. You can install an electric motor for the boat and then all you have to do is control your boat on turns.

Here, many may object that not everyone can afford the purchase of an electric motor. Even the Poltava electric motor (far from being the most powerful and sophisticated) is quite expensive.

But who said that you definitely need to buy it? It is quite possible to make an electric motor for a boat yourself, it is not so difficult. The main thing is to be able to use welding, to have free time, a little patience and all the necessary details.

6. Bearings.

7. Metal rods and plates.

Of course, the design obtained from these parts will differ significantly from the model described above. An electric motor for a boat of this type will not be able to move too fast, and the time that it can run at full power is not too long. But such an engine creates almost no noise and is completely safe for the environment.

The need to convert an ordinary boat into a motor boat can arise for various reasons. But here's how to do it if the budget is limited and there is not enough money to buy a ready-made motor. There are many options to help make a fully working outboard motor out of improvised materials available in every home.

Motor made using a trimmer

Before you start making a homemade motor for a boat, you need to decide on the choice of base from which the engine and other important parts for assembly will be taken. In this case, a trimmer will be used. In addition to this option, there are many more that use everything, even an ordinary screwdriver.

However, the lawnmower wins in many ways, and the design of its engine is closest to the design of a purchased outboard motor. This is proved by the drawings that many masters compared before making a choice what to take as a basis. homemade engine for the boat. And so let's consider:

• An engine that will save a huge amount of fuel (since the lawnmower is often used). What's more, it can be four-stroke, just like on conventional powerboats. However, this is very rare and is mostly two-stroke.
• All manual gasoline mowers use a plastic and translucent tank, which allows you to constantly monitor the amount of fuel in it
• The internal part of the structure predisposes to the fact that it can be easily converted to a boat motor without much straining

The main difficulty in modifying the trimmer is that the mower engine will not always be able to overpower the movement on the water. This is primarily due to different technology operation of each engine.

On a gasoline mower, it has a large number of revolutions due to low torque. For boating, the exact opposite is needed. However, this is easily fixed. But this requires tools (everyone has them) and drawings.

The main list of tools needed for work:

• The trimmer itself is the basis of the future boat motor. Since most often a homemade motor is made for rubber boat, having a small weight and size, the trimmer power can be small - about 0.8 kW. Even such a small power can provide an average human speed of 5-7 km per hour. However, if the motor is made for a heavier and more massive boat, you should choose mowers with higher power.
• The material that is ideal for making a screw (this can be done at home), most often it is duralumin with a thickness of about 2 mm
• A vise or any other tool that allows you to secure objects (in this case, the motor on the boat)
• Metal welding machine (any, but semi-automatic is better)

Manufacturing process

Creating an engine for a boat based on the above materials can take place in different ways. Either all the main components that must be present are bought, or they are made on their own (does not cause difficulty) using improvised materials

Calculations must be made, according to which it is then necessary to draw up a drawing of the screw. It is done on the basis of many parameters, the main ones are the size and weight of the boat.

It is easier and better to make a motor if you choose a lawn mower model that has a straight shaft. Otherwise, it will take a lot of effort and expense to convert a curved bar into a straight one.

If the screw is made by hand on the basis of calculations and drawings, then the edges must be sharpened well (almost at an acute angle). The propeller blades are usually made bent by about 10 mm. Since the material for manufacturing is still the same duralumin, in the case of poor screw performance, you can safely bend it, since the material is very elastic.

The screw is mounted in place of the trimmer head, which is removed when disassembling the mower. Be sure to use a nozzle in the form of a ring, since it is possible that the blades at high speeds can damage or even tear the material of the boat (if it is rubber). Adapters that allow you to connect the main motor shaft to the propeller can be purchased online. They are very cheap.

A rope starter can also be used from a lawn mower. However, if they are uncomfortable to start, you can use a speed bike from an old bike. After the entire assembly, it is enough to fix the resulting structure on the boat itself with a clamp.

Quick assembly of a boat motor using a chainsaw

Using a chainsaw engine to make a boat motor is very effective solution. First, at the stage of its disassembly, you need to pull out the tire and the pump that supplies oil to the chain, the lever that allows you to adjust the speed and the gas tank (not suitable due to the design of the motor).

Using textolite material, it is necessary to make an attachment point for the main part of the engine, in which the starter and the entire clutch mechanism will be located, to another part of the engine (this design will make the engine work most efficiently).

In the lowest part of the entire structure, it is necessary to insert a steel sleeve by pressing, which will be attached to the deadwood. Deadwood will be made from an inflatable paddle (cheap), which is made from duralumin. The clutch responsible for the clutch must be connected through a special shaft to the gearbox.

The gearbox can be made from component parts grinder. It is filled with oil used to lubricate the car's transmission. The structure is still fastened with a clamp or vice. The steering wheel that performs maneuvers can be made from a duralumin pipe (the rest of the oar).

For the gas handle, as in the case of a trimmer, a speed bike from a bicycle can act. The screw, as the main part of the motor, can be made in the same way as in the case of a trimmer, using duralumin. In this case, the calculations carried out to determine the size of the screw remain the same.

At one time, when King Hammurami was still living, he argued that the time spent on fishing was not included in the total time of life. This is also confirmed by many citizens who like to spend part of their free time fishing.

As a rule, most anglers own a boat. Many boats, especially modern ones, are equipped with gasoline engines. Yes, and a boat without a motor, especially if you have to fish in the water big lake becomes a burden that requires huge costs, forces and energy to move. And here you definitely need a motor: gasoline or electric - it doesn’t matter.

But still, Special attention should be given to the electric motor, because:

• electric ones do not require either oil or gasoline for their work, which means that there are no exhaust gases, which does not harm nature;
• electric motors are smaller, lighter and do not take up much space. This is especially true if you have to fish far, and every kilogram excess weight always felt;
• they are much more profitable than gasoline counterparts in economic terms;
• modern designs are assembled on modern parts designed according to modern technologies, so when minimum weight have maximum power.

But these statements take place if the owner of the boat already has an electric motor and has experienced such benefits to the fullest. But what to do if it is not there? So, you need to do it yourself.

Many enterprising boat owners use a drill or screwdriver that runs on batteries, since the industrial design of an electric motor is based on the same principle. Basic layout similar unit almost the same for all models and looks like this:

• the battery is the power source;
• the electric motor acts as a boat engine;
• a propeller with a gearbox is a working tool that ensures the movement of the boat through the water;
• control unit - consists of a handle for turning the direction of movement and changing the speed of rotation of the electric motor.

Almost all elements can be found in an electric drill or screwdriver. In this case, one should take into account the fact that industrial devices are hermetically sealed, which allows the main components to be in the water.

If you use an electric drill, it is desirable that it is located away from the water. This is the only problem, quite serious, that requires technical solution. The slightest ingress of water on the control unit can disable it, which will lead to a stop of the boat.

The advantages of such a model

If you take an electric drill, you should always remember that its main value is the engine and the speed control unit (button). Choosing a drill or screwdriver comes with some advantages over buying an industrial outboard motor:

• for the price, this acquisition will cost much less than buying a factory sample;
• according to the legislation, it is necessary to adhere to the requirements related to the power of engines used in various water bodies;
• the electric drill is powered by a battery or other power sources with suitable parameters;
• the electric drill is easy to repair, due to the availability of a sufficient number of spare parts on the market.

When choosing a drill, one should take into account the fact that it is mainly designed to work in a cyclic mode. If the drill is installed on a boat, then you need to rely more on a continuous cycle of work. This means that a power reserve is needed, otherwise the drill will overheat.

In such cases, you should opt for a power of 150 W or more. The power reserve will allow you to work with a propeller with a diameter of 130-150 mm. In addition, it must be taken into account that total weight boats will fit 300 kg, no more. We can assume that this is the maximum weight.

You should immediately pay attention to the fact that drills and screwdrivers are produced for different operating voltages, such as 12 V, 14.5 V, 16 V, 18 V and 24 volts. Batteries are also produced for the same voltage. And yet, the capacity of standard batteries that serve the operation of an electric drill or screwdriver in classic working conditions is not enough to provide the necessary movement of the boat on the water. In this regard, it is better to pay attention to a car battery, which has a much larger capacity. And since the car battery produces 12 V under load, then the drill should be selected with an operating voltage of 12 V.

Naturally, you can make a battery of batteries from a set of manufactured batteries for power tools for any voltage, but this can be much more expensive.

Necessary tools and materials

For such a device, you will need the following parts:

• electric drill for the motor;
• clamps for fastening the motor (drill). Both ready-made factory and handicraft are suitable;
• the gearbox from the grinder is suitable if the motor is installed on the transom of the boat;
• round tubes with a diameter of 20 mm and profiled tubes 20x20 mm. A rod and a mount for the motor (drill) will be made of them;
• a round metal rod from which the motor shaft will be made, as well as sheet metal for propeller.

To work, you may need the following tools:

• metal scissors;
• welding machine, although you can do without it;
• electric drill and a set of drills;
• grinder with cutting and grinding wheels;
• if the design provides for a tree, then nails or self-tapping screws (as well as a tree).

The presence of a lifting mechanism drastically simplifies the operation and maintenance of the entire system, especially since there are cases when it is urgent to raise the propeller. As a rule, such a mechanism controls the position of the electric motor in all planes (vertical and horizontal).

As an option, the following design of such a mechanism can be proposed: a motor is attached to the transom of the boat with the help of clamps, which are rigidly fixed to the plate. The clamps are equipped with rings through which the tube is threaded, and the motor shaft is threaded through the axis welded in the center of the tube. It turns out a very simple swivel, which can provide normal motor control.

As far as we know, the drill is designed for drilling holes and has a high final speed, which is not acceptable for running a propeller that operates at slower speeds. Therefore, in order to reduce the speed transmitted to the screw, the installation of a gearbox is required. Sometimes they need 2 pieces, depending on the design solutions. The upper gearbox should reduce the speed of the drill from 1500 to 200-300 rpm, which will ensure the normal running of the boat.

The lower gearbox is used for horizontal installation propeller. When using a gearbox from a grinder, it is simply clamped in the drill chuck.

The manufacture of a propeller propeller begins with marking it on a segment steel sheet. As mentioned above, its diameter should be no more than 130-150 mm. You can take a square of metal, 200x200 mm in size and 2.5-3.0 mm thick. It is better if it is stainless steel, although it is much more difficult to process. In extreme cases, you can use the impeller from the air exhaust fan or vehicle cooling system. At the same time, it should be borne in mind that the impeller profile is designed to work with air mass. In this regard, you will have to deal with its manufacture yourself.

A hole for the landing screw is drilled in the center of the square. Slots are made along the diagonals so that the sheet remains intact up to 25-30 mm in the center. After that, proceed to the formation of the shape of the blades. They usually have a rounded appearance. In this case, it is necessary to ensure that the blades have the same size, otherwise there will be vibrations. After that, the blades are slightly turned to a certain angle. In this case, the direction of rotation of the blade must be taken into account.

Since the manufacture takes place at home and, as they say, not to break off in the water, tests should be carried out. For this, any container of water that will fit the propeller will do. Naturally, the larger the capacity, the better. As a last resort, if possible, it is recommended to go out into nature, to a river or pond and try it out in action without installing it on a boat.

When the engine is running, a directional jet of water should be observed and felt. In addition, serious vibrations should not be felt. If the propeller does not work at full power, you can modify it by increasing the angle of inclination of the blades.

The motor control system is being finalized depending on the wishes of the boat owner. The main thing is that it is convenient to manage. It is better to take out the engine speed control button in a convenient place.

The following components should be included in the calculations:

• weight of the boat in full gear;
• power consumption of the electric motor;
• current and operating voltage.

During the assembly process, you should take an electrical measuring device and make sure that the engine power and load power match. The motor power must cover the load power. It is desirable that the engine power overlap the load power by at least 20%.

If the power of the engine matches the power consumed by the electric drill: if the power consumed, calculated by the formula P \u003d 12V x Ipot, corresponds to the declared power of the engine (electric drill), then we can say that everything is done correctly and the electric drill can be used as a motor for a boat. At the same time, one should not forget about 20% of the power reserve. It will be required in case of emergencies.

In the process of setting up, it is better to experiment with the impeller in order to find the correct configuration of the blades. As a rule, their shape significantly affects the economics of the engine.

Using the washer motor

Some owners who decide to make an electric motor for a boat on their own use various 12V motors that are used on board the car.

These motors are great for this kind of function, if only because they are designed to run on car battery. Despite this, they require some refinement.

Boat owners are constantly experimenting and finding amazing solutions. Makes them do it too great cost industrial samples. As a result, the idea of ​​installing a lawn mower engine on a boat was born. These are engines with a power of about 6 hp, which are designed for continuous operation under load in various conditions. Such an engine can be adapted to a boat if you use various spare parts designed to repair Soviet outboard motors.

Motor from the chainsaw "Ural -2"

Some craftsmen easily adapted motors from Soviet chainsaws as motors for boats. At one time, a huge number of chainsaws were produced, the quality of which must be discussed separately. Despite this, installed on boats, some motors serve to this day. The main thing is to calculate everything correctly.

Application of electric motor

This is very interest Ask. The use of conventional AC motors has been talked about for a long time. Such motors do not have a brush mechanism, so they are very easy to operate and operate.

But there are some factors that have to be taken into account. The first factor is the presence of an alternating voltage of 220 V. Alternatively, it is possible to install an inverter that can convert a direct voltage of 12 V to an alternating voltage of 220 V.

The second component is safety, because the voltage of 220 V is very dangerous for a person, especially on the water. This requires special measures. But if there is water all around, it is difficult even to imagine what exactly these measures should consist of.

There is practically ready-made version- this is the use of a motor from a trimmer or from a lawn mower. Almost everything is ready here, it remains only to decide on the length of the device and install the propeller. There is no need for an upper gearbox and no need to modify the control system and the engine power system.

The main task is to properly fix such a device on the boat. This is especially true in the presence of an inflatable boat.

Conclusion

The manufacture of such structures is available only to those boat owners who are in constant creative search. On the other hand, most of the boats are owned by anglers who are constantly experimenting. Therefore, it will not be difficult for them to carry out their ideas.

It is natural that self-manufacturing various designs are engaged creative people or people who are not allowed family budget buy a boat and a motor for it. Therefore, some anglers still use oars and do not regret it. They are only satisfied with the fact that they have a boat, as there is another category of anglers who do not have such a boat. They are happy to fish from the shore and envy those fishermen who have a boat, although without a motor.