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Owners radio controlled cars or aircraft with a motor, sooner or later they face the problem of buying spare parts. Such a serious technique needs timely care. It happens that it is necessary to change the engine or a separate spare part to it. But finding it is not always easy, and the price often "bites". We will help you resolve this issue. Our experts are ready not only to pick up the necessary goods, but also to carry out repair.
The catalog contains motors and spare parts for them. Here you can find a 3D model of an internal combustion engine:
- for a car,
- helicopter,
- aircraft.
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Eight reasons to order an internal combustion engine from us
- Attractive value.
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- Fast service at all stages.
If you need to buy a model of an internal combustion engine, get acquainted with the assortment of the Vremya Mashin catalog. The site will definitely have what you are looking for! Choose the right product and make your purchase online.
Micromotor MARZ-2.5D designed for installation on self-propelled models of aircraft, gliders, cars, snowmobiles, etc.
MARZ-2.5D is a single-cylinder two-stroke engine internal combustion.
The air-fuel mixture ignites in the engine cylinder without foreign source ignition, from the occurrence of high temperature during its compression. The energy of the burning fuel in the cylinder with the help of a crank mechanism is converted into kinetic energy on its shaft.
TECHNICAL DATA
- Cylinder diameter - 15.5 mm.
- Piston stroke - 13 mm.
- The volume of the cylinder is 2.48 cm 3 .
- Micromotor power
not less than - 0.25 kW.
- Speed with propeller 200 X 100 not less than 15,500 rpm.
- The composition of the fuel used (by volume): 50% ether (technical), 30 - kerosene, 10 - mineral oil MS-20; 10% castor oil.
- Cooling of the micromotor - air.
- The micromotor is lubricated by the oil contained in the fuel.
- Dimensions: height - 71 mm; length - 98 mm; width - 39 mm.
- The weight of the micromotor is not more than 155 g.
- Motor resource not less than 6 hours.
- Compression ratio - 10 ... 16.
- Purge - six-channel.
- The direction of rotation on the screw side is counterclockwise.
ENGINE OPERATION
When turning crankshaft 6 (Fig. 1) counterclockwise and the movement of the piston 1 in the cylinder from the bottom dead center (BDC) to the top dead center(TDC) in the crankcase 8 the engine is underpressure. Due to the opening of channel 11 by the spool from the carburetor, air will pass through the latter, which causes a rarefaction in its diffuser and the flow of fuel into it. Fuel flowing through an adjustable jet 2 and mixing with air, forms an air-fuel mixture, which enters the engine crankcase (mixture suction).
At this time, the air-fuel mixture that entered the cylinder through the purge windows (during the purge period) will be compressed. At a piston position close to TDC, as a result high heat the air-fuel mixture will ignite, and the piston will go down due to the increased pressure of the burnt gases in the cylinder, rotating with the help of a connecting rod crankshaft engine, making a working stroke.
At further movement piston to BDC, it will open the purge windows in the cylinder walls with the upper edge of the bottom, and the combustion products will escape into the atmosphere through them (the release of combustion products). While moving towards NMT the piston will open six scavenging channels in the wall of the cylinder skirt. Prepared and compressed
Fig.1 MARZ-2.5
Fig.2 Gas distribution diagram
melting working mixture from the engine crankcase, washing the piston bottom and cylinder walls like a fountain, it will enter the cylinder (cylinder purge). At return movement piston to TDC, it will block both channels through which fuel-air mixture enters the cylinder, and the channels for the release of combustion products. Compression will start fuel mixture. Thus, the cycle in the engine will repeat as above.
On fig. 2 shows the gas distribution diagram of the MARZ-2.5D engine, which shows the processes occurring in the engine cylinder depending on the angle of rotation of the crankshaft (piston position).
STARTING AND ADJUSTING THE ENGINE
- From a new engine, remove conservation grease by washing in gasoline or kerosene. Then through the exhaust windows and futorka 13 (see Fig. 1) pour 8 ... 10 drops of castor oil and turn the crankshaft 2 ... 3 times 6 for uniform distribution of lubricant in the cylinder and under the spool, which is important when starting the engine for the first time.
- Filter the engine fuel thoroughly.
- Fix the engine on a firmly reinforced board (installation), put it on the engine crankshaft air propeller, bring to the jet 2 carburetor hose from the fuel tank and securely fasten it to the carburetor fitting. The fuel level in the fuel tank before starting should be at the level of the jet opening or slightly above it.
- Turn the needle all the way 23 carburetor jet and unscrew it three full turns.
- Set the counter piston to the position corresponding to the position of the piston at TDC, and then unscrew the screw 3 counter piston by 1.5 ... 2 turns.
- Close the inlet of the futorka with your finger 13 and turn the propeller 2 ... 3 times to suck fuel into the crankcase. Open the intake port and again turn the engine crankshaft 2 ... 3 turns.
- By sharp finger blows on the propeller blade and at the same time selecting the most favorable compression ratio air-fuel mixture by turning the adjusting screw of the counter-piston, turn the engine crankshaft counterclockwise (when looking at the screw, see Fig. 1). After a few flashes, the engine should start.
Warning. During engine operation, you must not be in the plane of rotation of the screw.
With the engine running, adjust maximum speed counter piston screw and carburetor needle.
Notes: a) If the engine does not start after several flashes (which indicates high or low compression in the cylinder), you should adjust the counter piston screw or adjust the fuel supply.
b) If, with increasing compression, the running engine decreases speed, then the adjusting screw of the counter-piston should be unscrewed or the fuel supply should be reduced.
- Let the engine run at medium speed for 20 minutes to run in its rubbing parts and gain skills in adjusting it.
- Remove the engine from the board (installation) and wipe it dry, and it is necessary to ensure that dirt and other foreign particles do not get into the holes of the exhaust windows of the cylinder and into the carburetor channel.
After that, the engine is ready for installation on the model. Start the engine on the model as described above.
More details about the MARZ-2.5D micromotor can be found in the PDF manual and on the DWG drawing
In contact with
Since oil products are constantly rising in price (after all, oil tends to run out), the desire to save on fuel is quite understandable, and mini engine could be a good solution.
How economical is a mini internal combustion engine?
As you know, internal combustion engines are divided into gasoline and diesel, and both the first and the second are undergoing significant changes today. The reason for the modernization of both the mechanisms themselves and the fuel is the significantly worsened ecology, the state of which is also affected by the emissions of equipment running on liquid fuel. So, for example, eco-gasoline appeared, diluted with alcohol in a ratio of 8:2 to 2:8, that is, alcohol in such fuel can contain from 20 to 80 percent. But that's where the upgrade ends. decreasing trend gasoline engines practically not observed in volume. The smallest examples are installed in model aircraft, the larger ones are used on lawn mowers, outboard motors, snowmobiles, scooters and other similar vehicles.
As for today, a lot has really been done to make this engine truly microscopic. The concern is currently Toyota created the smallest minicars Corolla II, Corsa and Tercel, they are equipped with diesel engines 1N And 1NT only 1.5 liters. One problem is that the service life of such mechanisms is extremely low, and the reason for this is the very fast depletion of the resource. cylinder-piston group. There are also very tiny diesel internal combustion engines, with a volume of only 0.21 liters. They are installed on compact motor vehicles and building mechanisms, but you can’t expect great power, the maximum that they give out is 3.25 hp. However, the fuel consumption of such models is small, as evidenced by the volume fuel tank- 2.5 liters.
How efficient is the smallest internal combustion engine?
A conventional internal combustion engine, which is based on the reciprocating movement of the piston, loses performance as the displacement decreases. It's all about a significant loss of efficiency when converting this very movement of the CPG into rotational, which is so necessary for the wheels. However, even before the Second World War, self-taught mechanic Felix Heinrich Wankel created the first working example of a rotary-piston internal combustion engine, in which all components only rotate. Logically, this design, which is very reminiscent of an electric motor, reduces the number of parts by 40% compared to standard motors.
Even though before today not all problems solved this mechanism, service life, efficiency and environmental friendliness meet the established world standards. Productivity exceeds all conceivable limits. Rotary-piston internal combustion engine with a working volume of 1.3 liters allows you to develop a power of 220 Horse power . The installation of a turbocharger increases this figure to 350 hp, which is very significant. Well, the most small engine internal combustion from the "Wankel" series, known under the brand name OSMG 1400, has a volume of only 0.005 liters, but at the same time it produces a power of 1.27 hp. at own weight 335 grams.
Main advantage rotary piston engines- no noise accompanying the operation of mechanisms, due to the low mass of operating units and the exact balance of the shaft.
The smallest diesel engine as a source of energy
If we talk about a full-fledged one, then today the brainchild of engineer Jesus Wilder has the smallest size. This is a 12-cylinder V-type engine, fully consistent with the internal combustion engine Ferrar i and Lamborghini. However, in reality, the mechanism is a useless trinket, since it does not run on liquid fuel, but on compressed air, and with a working volume of 12 cubic centimeters has a very low efficiency.
Another thing is the smallest diesel engine, developed by British scientists. True, it does not require diesel fuel as a fuel, but a special mixture of methanol and hydrogen that spontaneously ignites with increasing pressure. With the clock movement of the piston in the combustion chamber, the volume of which does not exceed one cubic millimeter, a flash occurs that sets the mechanism in motion. Curiously, microscopic dimensions were achieved by installing flat parts, in particular, the same pistons are ultra-thin plates. Already today, in an internal combustion engine with dimensions of 5x15x3 millimeters, a tiny shaft rotates at a speed of 50,000 rpm, as a result of which it produces a power of about 11.2 watts.
So far, scientists are facing a number of problems that need to be solved before producing diesel mini-engines on mass production. In particular, these are colossal heat losses due to the extremely thin walls of the combustion chamber and the fragility of materials when exposed to high temperatures. However, when tiny internal combustion engines do roll off the line, just a few grams of fuel will be enough to make a mechanism with an efficiency of 10% work 20 times longer and more efficient than batteries the same sizes.
The parameters of batteries for consumer electronics are constantly improving, but this is not enough for consumers. Come on, they say, a revolution, we want to work on our laptops for a whole day without recharging. Scientists give an original answer to these requirements - they create an internal combustion engine for a computer.
The Berkeley Sensor & Actuator Center, an industrial university research organization, the University of California, Berkeley, the Pentagon research agency DARPA and a number of US companies are working on a curious project - Wankel engines the size of a few millimeters.
The MEMS Rotary Engine Power System program is led by Professor Albert P. Pisano of the University of California.
Already built whole line rotary piston internal combustion engines with a rotor diameter of only a dozen or two millimeters and even one or three millimeters with an output power of 4-100 watts and 0.026-0.03 watts, respectively.
What kind of “cars” do the researchers intend to set in motion with these micro-ICEs? It's time to clarify that MEMS in the name of the program means "micro-electro-mechanical systems."
These unusual wankels are designed to turn generators and provide current for electronic appliances, various sensors (including those working "in the field" with military, say, targets), laptops, cell phones, microrobots and similar electronic devices.
And this rotor does have a diameter of 3 millimeters (photo from me.berkeley.edu).
It would seem, why fence a garden with an internal combustion engine that has moving parts?
There are excellent lithium-ion batteries, the improvement of which, we note, continues.
According to Professor Pisano, there is a reason. Microscopic wankels have an energy density of approximately 2300 watt-hours per kilogram (in the case of using liquid hydrogen as fuel, and taking into account the engine efficiency of 20%), which is 7 times more than lithium batteries and 14 times that of alkaline batteries.
The ultimate goal is to create miniature devices in the dimensions and design of conventional batteries (for cell phones, for example), which include both a fuel supply, an internal combustion engine, and a generator.
The models under consideration are different types fuels (hydrogen, hydrocarbons, alcohols).
A scattering of 1-mm rotors and housings for them, the experimenters "print" like pies - from a single blank (photo from the site me.berkeley.edu).
Interestingly, for their smallest engines, the researchers provided an original way mass production rotors and housings made of silicon, a method somewhat similar to the production of microcircuits.
The study, which began several years ago, has spawned a host of sub-projects.
A number of organizations are involved in the creation best technology, materials and devices for forming the fuel mixture, igniting it in such a miniature internal combustion engine, integrating the generator directly into the rotor, and other similar tasks.
The perseverance of researchers can be envied. But supporters of the idea of microscopic internal combustion engines are opposed by another strong camp - the creators of fuel cells.
Scheme of a "rotary" battery (illustration from the site darpa.mil).
Miniaturization and boost specifications the latter is in full swing. Both options for hydrogen are offered, as well as installations that include a reformer that converts the initial fuel into hydrogen - most often alcohol.
Here, for example Japanese firm Casio in 2002 created subminiature fuel cells for laptops and cameras in terms of dimensions and connecting parts exactly matching standard batteries.
The elements are complemented by subminiature reformers that produce hydrogen from methanol.
According to the firm, these cells are lighter than analogs in size of lithium-ion batteries with significantly larger capacity: A typical laptop will run 16-20 hours on them.
Casio intended to bring its fuel cells to market in 2004. While it's quiet.
fuel cells from Casio, made in the form of batteries for laptops and cameras (photo from world.casio.com).
There were a few more similar projects from other companies (and the dates for the start of sales were also called - somewhere in 2004), but something is also not heard about their mass distribution. And about miniature wankels, alas, there is no fresh and encouraging (in terms of implementation) news.
