Always the simplest and most convenient solutions are very popular. Especially when it comes to heating facilities. So, the rocket stove is ideal for use in a private home, as the craftsmen themselves will be able to design it without emptying their wallet too much. Moreover, the principle of the rocket stove makes it possible to adapt to any design of the house. The same principle was used in Korea and China to heat their homes in winter. The advantage is that firewood with this type of heating is spent much less than in a traditional Russian stove.

The operation of this furnace is based on two basic principles:

1. Direct combustion - the free flow of fuel gases through the furnace channels without being stimulated by the draft created by the chimney.
2. Post-combustion of flue gases emitted during the combustion of wood (pyrolysis)

A rocket furnace can be fired with recycled materials, tree trimmings, and almost all potentially burning ones, since at the exit from the furnace, due to the high combustion temperatures, almost only carbon dioxide and water vapor are released in the furnace itself. The long chimney ensures complete cooling, so that water can escape. With the correct design of this furnace, the fuel should burn only in the lower part, gradually settling.

Simultaneous use rocket oven for cooking and for heating the room makes it versatile.

This unusual type of heating systems is not familiar to ordinary developers. Many professional stove-makers have also never encountered such designs. This is not surprising, since the idea of ​​a rocket stove came to us from America relatively recently, and today enthusiasts are trying to bring it to the mass consciousness of citizens.

Due to the simplicity and low cost of construction, thermal comfort and high efficiency rocket stoves deserve a separate article, which we decided to devote to them.

How does a rocket oven work?

Despite the loud space name, this heating structure has nothing to do with rocket systems. The only external effect that gives some resemblance is a jet of flame that breaks out of a vertical pipe near the camping version of the rocket stove.

The work of this hearth is based on two basic principles:

1. Direct combustion - the free flow of fuel gases through the furnace channels without being stimulated by the draft created by the chimney.
2. Post-combustion of flue gases released during the combustion of wood (pyrolysis).

The simplest jet furnace works on the principle of direct combustion. To achieve thermal decomposition of wood (pyrolysis), its design does not allow. To do this, it is necessary to perform a powerful heat-accumulating coating of the outer casing and high-quality thermal insulation of the inner pipe.

Despite this, portable rocket stoves perform their functions well. They don't require a lot of power. The generated heat is enough for cooking and heating in the tent.

Rocket furnace designs

To begin acquaintance with any design should be with its simplest options. Therefore, we present a diagram of the operation of a mobile rocket stove (Fig. 1). It clearly shows that the firebox and the combustion chamber are combined in one segment. steel pipe, bent up.

For laying firewood, a plate is welded in the lower part of the pipe, under which there is an air hole. Ash, which plays the role of a heat insulator, helps to enhance heat transfer in the cooking zone. It is poured into the lower part of the outer casing.

The secondary chamber (casing) can be made of metal barrel, bucket or old gas cylinder.

In addition to metal, the simplest rocket furnace can be built from several dozen bricks even without the use of mortar. A firebox and a vertical chamber are laid out of them. Dishes are placed on its walls so that there is a gap under the bottom for the exit of flue gases (Fig. 2).

A prerequisite for the good operation of such a design is a “warm pipe”, as the stove-makers say. In practice, this means that before laying firewood, the rocket stove must be warmed up for several minutes, burning wood chips and paper in it. After the pipe is warmed up, the firewood is stacked in the firebox and set on fire, a powerful upward flow of hot gases appears in the furnace channel.

Bookmark fuel in simple designs rocket furnaces horizontal. This is not very convenient, because it forces you to periodically push the firewood into the firebox as it burns out. Therefore, in stationary systems, a vertical bookmark is used, and air is supplied from below through a special blower (Fig. 3).

Burning out, the firewood itself falls into the oven, saving the owner from manual feeding.

Main dimensions

A visual representation of the configuration of a stationary rocket furnace long burning gives drawing #1.

Anyone who wants to build a stationary rocket furnace, without being distracted by simplified modifications, must know its basic dimensions. All dimensions of this design are tied to the diameter (D) of the cap (drum) covering the vertical part of the flame tube (riser). The second dimension required for calculations is the cross-sectional area (S) of the cap.

Based on the two indicated values, the remaining dimensions of the furnace structure are calculated:

1. The cap height H is between 1.5 and 2D.
2. The height of its clay coating is 2/3H.
3. Coating thickness - 1/3D.
4. The cross-sectional area of ​​the flame tube is 5-6% of the cap area (S).
5. The size of the gap between the cap cover and the upper edge of the flame tube should not be less than 7 cm.
6. The length of the horizontal section of the flame tube must be equal to the height of the vertical one. Their cross-sectional areas are the same.
7. The blower area should be 50% of the cross-sectional area of ​​the flame tube. To ensure a stable operation of the furnace, experts recommend making a flame channel from a rectangular metal pipe with an aspect ratio of 1:2. She is laid flat.
8. The volume of the ash pan at the exit from the furnace into the external horizontal smoke channel must be at least 5% of the volume of the cap (drum).
9. The external chimney must have a cross-sectional area between 1.5 and 2S.
10. The thickness of the adobe insulation pad, which is made under the external chimney, is chosen in the range from 50 to 70 mm.
11. The thickness of the adobe coating of the bench is chosen equal to 0.25D (for a drum with a diameter of 600 mm) and 0.5D for a cap with a diameter of 300 mm.
12. External chimney must be at least 4 meters high.
13. The length of the flue in the bed depends on the diameter of the cap. If it is made from a 200-liter barrel (diameter 60 cm), then you can make a bed up to 6 meters long. If the cap is made of a gas cylinder (diameter 30 cm), then the bench should not be longer than 4 meters.

When building a stationary rocket furnace, you need to pay Special attention the quality of the lining of the vertical section of the flame tube (riser). To do this, you can use refractory bricks of the ShL brand (light fireclay) or washed river sand. To protect the lining from flue gases, it is made in a metal shell, using old buckets or a galvanized sheet for this.

Sand filling is done in layers. Each layer is compacted and lightly sprayed with water. After making 5-6 layers, they are given a week to dry. It is easier to make thermal protection from fireclay, but the space between the outer shell and the brick will also have to be covered with sand so that there are no empty cavities (Fig. 4).

Figure No. 4 scheme of the lining of the flame channels of rocket furnaces

After the backfill has dried, the upper edge of the lining is coated with clay and only after that the installation is continued. jet furnace-rockets.

Advantages and disadvantages of rocket stoves

An important advantage of a properly constructed structure is omnivorousness. Such an oven can be heated by any type solid fuel and wood waste. Moreover, the moisture content of wood does not play a special role here. If someone claims that such a stove can only work on well-dried wood, then this means that gross mistakes were made during its construction.

The heat output of the rocket furnace, which is based on a barrel drum, is very impressive and reaches 18 kW. A gas cylinder stove is capable of developing a thermal power of up to 10 kW. This is quite enough for heating a room with an area of ​​16-20 m2. We also note that the adjustment of the power of rocket furnaces is carried out only by changing the volume of loaded fuel. It is impossible to change the heat transfer by supplying air. The blower adjustment is used only to enter the furnace into operating mode.

Since the amount of heat generated by the rocket oven is very large, it is not a sin to use it for household needs such as heating food (on the drum lid). But it is impossible to use such a hearth to heat water used in a radiator heating system. Any introduction of coils and registers into the furnace design adversely affects its operation, worsening or stopping the pyrolysis process.

Useful advice: before you start building a stationary jet furnace, make a simplified camp structure from metal or clay. So you will work out the basic assembly techniques and get useful experience.

The disadvantages of rocket stoves include the impossibility of their use in baths and garages. Their design is designed for energy storage and long-term heating. Therefore, it cannot give a lot of heat in a short period of time, as is necessary in the steam room. For garages that store fuels and lubricants, an open flame oven is also not the best option.

We assemble a rocket stove with our own hands

The easiest way is to assemble a camping-garden version of a jet stove. To do this, you do not have to purchase masonry materials and prepare adobe for coating.

A few metal buckets, a stainless steel pipe for the flame channel and small gravel for backfilling - that's all you need in order to make a do-it-yourself rocket furnace.

First step- cutting holes in the lower bucket with scissors for metal to pass the flame tube. It must be done at such a height that there is room under the pipe for crushed stone backfill.

Second step- installation in the lower bucket of a flame tube, consisting of two elbows: a short boot and a long one for the outlet of gases.

Third step- cutting a hole in the bottom of the upper bucket, which is put on the lower one. The head of the frying pipe is inserted into it so that its cut is 3-4 cm above the bottom.

Fourth- backfilling with small gravel in the lower bucket at half its height. It is needed for heat accumulation and thermal insulation of the flame channel.

Last step- production of a stand for dishes. It can be welded from round reinforcement with a diameter of 8-10 mm.

A more complex, but at the same time durable, powerful and aesthetic version of the rocket stove requires the use of a gas cylinder and a thick rectangular steel pipe.

The assembly scheme does not change. The exhaust gas here is organized on the side, and not at the top. For cooking, the upper part with a valve is cut off from the cylinder and a flat round plate 4-5 mm thick is welded in its place.

In order for the jet furnace to work efficiently, the following rules must be observed during the installation of the structure:

1. The chimney must be at least twice as long as the horizontal or sloped section.
2. The fuel compartment must be the same length as horizontal section. Usually the firebox is installed at an angle of 45 °, although there are designs with an angle of 90 °. But they are less convenient in terms of fuel loading.
3. The cross section of the chimney should not be smaller than the fuel compartment itself.

Device

Robinson factory camping stoves are made from profile pipe with a section of 150 × 100 mm. Homemade designs are made the same size. In this case, the bunker is made of a profile pipe, and the chimney is made of a round one. In order for there to be normal draft, the chimney pipe must have a diameter not less than the cross section of the firebox.

For such a fuel compartment, a chimney no longer than 90 cm is allowed. But such dimensions make the unit inconvenient for transportation, so it is better to limit yourself to a minimum of 60 cm.

For the legs, a steel bar is taken. They are threaded, making the supports easy to install and remove. However, after repeated use of the jet oven, it is pretty smoky, so the process of screwing the legs is not very pleasant. However, other options are also common, where a steel sheet is used to make the stand or non-removable legs are installed. But this makes the design more dimensional and inconvenient during transportation.

Robinson factory ovens there is no air supply to the combustion zone, and they do not have an adjustable cover that changes the air supply. This point can be corrected in homemade ovens. A plate is welded inside the fuel hopper, at the bottom of which there is a grate. Fuel is placed on the flat element. Air enters the combustion zone through the grate, and a damper can be installed at the top of the firebox, with which the air supply will be regulated. It is made somewhat smaller than the firebox and should not completely block the hole, otherwise the air will stop flowing into the compartment and the fire will die out.

This design of the reactive furnace provides a number of advantages:

• a small amount of solid fuel allows for a short time bring water to a boil, heat food or cook simple dishes;
• Robinson is not afraid of the wind, because the fire does not die out;
• the jet furnace is easy to install;
• the device does not smoke or smoke;
• factory models are made of high-quality metal and covered with heat-resistant paint that can withstand high temperatures;
• fuel does not burn out too quickly;
• the device allows you to dry firewood;
• the design is stable and easy to use;
• the rocket oven heats up pretty quickly;
• the maximum surface temperature reaches 900 °C;
• thick steel (3.5 mm) ensures the durability of the device.

The price of the factory model is approximately 5 thousand rubles. But you can save money by making such a unit with your own hands. This task is feasible if you have certain skills.

Making a Robinson oven

The simple design of the device allows you to make a rocket stove at home. The whole procedure will take only a few hours. Materials for work are easy to find, besides, they need a little. The hand-made unit has a compact size and is easy to use.

The camping rocket stove is equipped with an important detail that greatly facilitates the maintenance of the unit. This metal plate with grating located at the bottom of the firebox. As a rule, it is made retractable, which allows you to remove the grate, lay firewood on it and install it back. A similar plate also serves as a stand for long chips. In addition, with the grate removed, it is easier to clean the fuel compartment.

To make a jet furnace with your own hands, you must use the following materials :

• two square pipes 150 × 150 × 3 mm: one is 45 cm long, the second is 30 cm;
• 4 steel strips 300×50×3 mm;
• 2 steel strips 140×50×3 mm;
• metal grate 300 × 140 mm (it can be made from a rod of the same material with a diameter of 3-5 mm and a length of 2.5 m).

The manufacturing technology of the Robinson camp stove includes the following operations:

Do-it-yourself Robinson factory model

Making a rocket furnace similar to the one produced in factories is not a difficult task. There are not so many structural elements in this model:

As for the dish rack, its configuration is not of fundamental importance for the operation of the device. Therefore, this element can be done in a different way. At the same time, it is important to observe the rule according to which the stand should not block the chimney opening, so as not to disturb the draft.

In the model under consideration, 3 rings are cut in half and welded to a metal rod.

A similar design is more complicated than the previous one in that the duct is rectangular in cross section, and the chimney is round. Therefore, it is important to correctly perform operations to connect two parts into one device. Generally production technology is as follows:

1. It all starts with the manufacture of a plate with a grate that will divide the bunker into two parts. To do this, pieces of reinforcement are welded to a flat element in increments of 10 mm.
2. The resulting part must be welded to the rear and side walls of the hopper. The distance from the bottom edge to the grating plate should be 30-35 mm. The part must be attached with welding machine parallel to the bottom edge.
3. Then you need to carefully weld the joints of the walls together.
4. The bottom is attached to the resulting structure, and nuts are attached to it.
5. The top plate is welded to the back and side walls.
6. A cut is marked on the pipe at an angle of 30 °. The unnecessary part is cut off.
7. The end, which has acquired the shape of an oval, must be attached to the upper section of the bunker. In this case, the pipe is placed in the lowest part of the upper plate and equidistant from the side walls. This element is circled with a marker, a hole is cut out according to the markup. To do this, you can use a welding machine or a device for cutting metal.
8. Then a pipe must be attached to the resulting hole. A stand is installed on top of it, and the legs are screwed into the nuts. Now the rocket oven can be tested. After that, it is covered with heat-resistant paint.

Production of a modernized Robinson furnace

The model described in the previous section can be improved with a door that is installed on the fuel tank. But if you make a hinged sash, it will simply lean up, which will not allow you to adjust the traction. Such a part can only be in the “closed” or “open” position. It will be much more efficient to use a damper that moves vertically or horizontally. To install it, small corners of 10 × 10 mm or 15 × 15 mm must be welded on the bunker.

In addition, the following options for upgrading the furnace are noted:

• the fuel bunker can be made of thicker steel, for example 5 mm;
• replace the round chimney with a square one;
• use a different design for the stand: as an option, take corners, balls or other elements that are at hand;
• change the stand for a camping stove-rocket, for which a metal plate and a piece of reinforcement for making a leg can be used.

To make an upgraded oven, you will need the following materials:

1. Square pipe with a section of 160 × 160 mm and a length of 400 mm. A firebox will be made from it.
2. Square pipe with a section of 120 × 120 mm and a length of 600 mm. It is needed to make a chimney.
3. A five-millimeter sheet of steel and a piece of reinforcement with a diameter of 7-8 mm. Of these, an element will be made that separates the fuel compartment and the blower channel. The size of the part should be 300 × 155 mm.
4. Steel sheet 350×180 mm. Such material is necessary for the manufacture of the oven stand.
5. Steel sheet 160×100 mm in size.

The production technology of this model of a camping stove does not fundamentally differ from the creation of similar structures:

1. A metal plate with a grate must be welded to the walls of the bunker.
2. Then attached rear part containers, and on top - a chimney.
3. When the whole structure is ready, a metal stand is welded to it from below, and an additional support is made from a piece of reinforcement. For it, you can also use the part of the vertical pipe that remains after cutting.
4. Pieces of corners are welded on top of the vertical pipe, which will form a stand for dishes. Its height should be 40-50 mm.
5. The opening in the fuel tank must be closed with a hinged door or a damper inserted into the corners.
6. The finished product can be tested. If everything went well, the welds are cleaned, and the jet furnace is covered with heat-resistant paint. This will not only give the product a more attractive appearance, but also protect the metal from corrosion.

Outcome

It can be concluded that any of the proposed models is quite easy to make at home. To find necessary materials won't be difficult. The work itself is not very difficult for someone who has used a welding machine more than once and has some experience working with metal. It will take only a few hours to make a rocket furnace. And the resulting product will be useful item for lovers of outdoor activities outside the city.

In addition, such a rocket stove will allow you to heat a small summer cottage and will be a good alternative to a full-fledged heating system. The principle of operation of the Robinson jet furnace allows significant savings on fuel.

Dear visitors of the site "", today we will consider detailed instructions on self assembly do-it-yourself camping rocket stove without welding. The jet stove appeared relatively recently and was invented abroad, but in a short period of time it gained people's love and respect in our country, especially among tourists, fishermen and hunters, and of course this stove is distinguished by its economy in the consumption of firewood and the return on output maximum number heat due to jet thrust created by the furnace design itself. With its help, you can cook food in a short time, boil a kettle, which is very important in a hike.

The design of the jet furnace is very simple - it is a vertically located pipe (it is also a body and a chimney) and a firebox adjacent at an angle, divided inside by a plate into two parts (the top for loading firewood, the bottom for air access to the combustion source) thus a jet draft is formed, from here and big name « «.

The presented furnace is made with the expectation of compactness, since every gram of cargo and space in a backpack is very important on a hike. For its manufacture, a used helium cylinder was taken (a fire extinguisher can be used), its upper part was sawn off, and a technological hole for installing a firebox was cut on the side, the design is completely collapsible and all parts are in the stowed position inside the case. We remind you that during its manufacture a welding machine is not needed, which simplifies the creation process to the maximum.

Let's look at all the stages of assembling a jet furnace.

materials

1. helium tank or used fire extinguisher
2. square tube
3. metal perforated plate
4. bolts and nuts
5. metal sheet 1-2 mm

Instruments

1. Bulgarian (UShM)
2. drill
3. pliers
4. heat resistant paint can

Step-by-step instructions for creating a camping jet rocket furnace.

To begin with, let's look at the drawing of the domestic Robinson stove, which is also an excellent design, but welded, and the one below is much more versatile and is rightfully considered a camp stove.

First of all, you need to find a used helium cylinder or an old fire extinguisher, bleed off the remaining contents, unscrew the valve and rinse with water, then cut off the upper part, and also make a technological hole in the lower part for installing a square pipe firebox.




We make a grate from a perforated plate.
Support legs for firebox.
We collect all the details into a single whole.

A pointed metal pin is screwed in the lower part, it is necessary so that when the furnace is installed in the working position, it stands firmly on the ground, and this stake is buried in the ground. In the stowed position, it twists. We cut out a comforter from sheet metal 1-2 mm.




By the way, the pin is in the stowed position.
Also, in addition to the components from the stove, you can put a small supply of dry firewood in the cylinder, which can be very helpful in wet and rainy weather. Just imagine .. you went camping and you were caught in heavy rain, everything around you got wet, damp and disgusting, and you calmly take out your camping stove-rocket and make a fire, cook food, boil a kettle and everything is fine with you 😉
Additionally, a cable was pulled to fix the firebox.
Here is such a wonderful oven turned out, its advantage is that it is economical, compact, collapsible.

This design made without the use of welding, which greatly simplifies the assembly process for those people who do not have a welding machine or do not know how to use welding. We hope our material was useful to you. You can also watch a video of the oven in action. Enjoy watching!

The rocket furnace according to its design is divided into two main types: portable and stationary. A portable model is used in hiking, relaxing in nature. Its industrial model called "Robinson" is widespread. It gets its name because it looks like a rocket. The similarity of the image is added by the fact that a flame bursts out of a short chimney during combustion, with an unlimited supply of air, a rumble is emitted. It is used for cooking, heating the kettle in field conditions.

Consider the principle of operation, based on the above model.

Description of work

1. For the construction, steel with a thickness of 2-3 mm is used.
2. It has the shape of a matchbox, without a box. A lid and a bottom are welded to its side. On the other side there will be a firebox into which firewood is directly loaded.
3. At the top, closer to the bottom, a pipe is welded to the box at an angle of 45 degrees. A structure is welded on top to act as a stand for dishes and a flame divider.
4. So that the flame does not burn through the bottom of the dishes during cooking. For manufacturing, you will need a piece of pipe, which is cut into three rings, each ring is cut in half, for a total of six half rings, we weld them with a uniform indent in the center, the product is welded to the top of the chimney.
5. Legs are welded to the bottom of the box, ensuring the stability of the structure.

The finished sample with dimensions is shown below in the illustration and diagram.

Principle of operation

• The considered option is good in that it is not required to build a structure over a fire for hanging a cauldron or a teapot.
• Cooking kulesh or fish soup will be more comfortable, as in cooker at home. The installation should be oriented towards the wind, it should blow into the furnace.
• Firewood burns out quickly, the heat generated is enough for cooking, but most of it disappears.
• In the stationary model, these shortcomings are eliminated by improving the basic design. Namely, the furnace is equipped with a door, a blower is arranged under it, which limits the air supply, thereby slowing down the process of burning firewood.
• Air is also supplied to the area above the combustion, where the gases go, but do not burn there, this makes it possible to start the pyrolysis process, thereby ensuring the burning of the pyrolysis gases.
• Also, the fuel combustion chamber should be wrapped in a casing, which increases thermal insulation. A manufactured thermal insulator is put on it, this additionally retains heat inside, shown below.

materials

The Rocket Furnace will require the following consumables to be crafted: two gas bottles and everything in the table below.

Getting Started

We cut off a piece of 20 cm from the profile, cut the rest into three parts.

From a piece, 315 mm in size, a “bed” base is made, from the second, 300 mm in size - a place for loading firewood and weld it at an angle. To do this, we do a saw cut on an oblique.

We cut the third blank, 280 mm in size, across, we get two channels, the one with a width of 35 mm is welded from the bottom, thereby making a blower.

On the upper surface of the base, we cut out a rectangular hole for the entire width, long for a bunker with a blower, on it, from the side of the joint, we make a cutout for it. The distance from the beginning to the workpiece is 100 mm.

Safety measures should be observed when cutting, first it must be filled with water, this will etch the remaining gas condensate.

Blower manufacturing process

From the bottom of the base, opposite the hole, we weld five rods, 16 cm long, from reinforcement. We make slots between the welded grates. Next, we weld another part of the channel (the remainder from the third workpiece) below the grate. We weld on back wall, on which, for the convenience of further installation, bevel cases, its plug. After the “working” blank has been welded to the base, the bottom should be welded with a plug.

Next, we proceed to the manufacture of the casing, which will act as a conductor. The space between them will be filled with mineral filler perlite. At the bottom of it, we make a cutout for the “sunbed”, the width is 120, and the height of the cutout will be 160 mm, i.e. from below we weld a strip using a cut piece 40 mm long.

This insulates the bottom at the junction with perlite. We hide it in the casing, weld a round cover on its bottom.

Desired volume of perlite

For the upcoming purchase, you should find out experimentally, for this you should fill this space with water. It turns out the desired volume. Perlite is sold in garden stores, its measure is liters. A channel is welded to the bunker, traction will be provided through it and the loading bunker will be mounted on the base. Inside the "working" we organize the air supply. To do this, we crash there through the casing and weld the workpiece to the place of the slot, in the form of a ring. With a piece of profile pipe we make a branch for the air duct. It has a door for adjustment.

Doors are made and attached to the furnace with a blower and to the loading chamber with a draft chamber. The doors on the boot should be used regularly, but on the firebox - only when igniting or when choosing ash, so it’s better to construct them as shown below, it will be more practical.

Perlite is filled in and the hole is welded from above with an annular plug. In this case, 5 and a half liters of insulation were used.

Measurements are made and a hole is cut out in order to put on the lower section of the insulation. Since an air leak was attached to the side of the stove, the cutout does not come out in the correct rectangular shape.

We also manufacture two balloon rings.

Rings are worn at the junction between, one outside, the other inside.

Between them, a packing is laid, which is a non-combustible sealing cord, 150 mm long and 10 mm thick. These manipulations will allow you to securely fix the upper section of the cap, putting it in the grooves of the so-called “saddle”, while it remains removable in order to ensure the possibility of cleaning from waste in the future.

rocket stove video

For ease of installation of the lower part of the oven can be turned over. We center it by welding spacers between the cap and the casing. After that, we weld the insert over the "bed" to the place of the cutout. We weld rings, the width of which is 30 mm with a release to the top of 20 mm, one inside the lower cap, the other from the outside.

We calculate the distance between the top of the "working" pipe and the upper surface of the cap. The cross-sectional area must be less than the lateral area of ​​the imaginary cylinder. In this case, its diameter is 120 mm. The cross-sectional area is 11304 mm². The experimentally calculated figure of the desired distance is 50 mm.

Summary: the top will heat up, and the heat will diverge over the entire surface area - this will be a stove with excellent efficiency, since the heat will remain in the device, and will not fly out into the chimney.

The cap is fastened as follows: corners with 10 holes are welded along the contour from below and from above and twisted with bolts 8x8 cm long in four places.

The last stage is the output of the chimney at the bottom. To do this, cut a hole under it.

The stationary rocket furnace in this article was considered using the example of video material, which can be viewed by clicking on the links below.