Power stroke is only 1 / 4 of the cycle, the piston movement during remaining cycles is ensured by the inertia of crankshaft and associated rotating parts. Two-stroke engine differs from the four-bit more complicated workflow, but its design simply due to lack of timing mechanism and its drive (in the head is just a candle). We also have a two-stroke engine and off compression stroke, but the issue of admission and are united in a special process called purging. Purge begins at the end of the stroke and ends at the beginning of the compression stroke, ie when the piston is near BDC. Fuel mixture from the carburetor comes not just in the cylinder, and first sucked into the crankcase engine under the influence of depression formed therein when the piston moves to TDC.
At this time the cylinder is compressed mixture of the previous cycle. Candle ignites the mixture, and the piston under the action of expanding gases moves down, rotating the crankshaft and a new batch of compressing the mixture in the crankcase. Before reaching the BDC, the piston opens the exhaust window in the wall of the cylinder and the exhaust gases escape through the exhaust pipe into the muffler. Cylinder pressure drops sharply. Then the piston opens the window purge and fresh mixture, compressed in the crankcase passes through the bypass ka nalam, enters the cylinder through a purge box and filling it and forcing the remaining exhaust gases. Piston BDC and is moving up, closes the first purge the window, and then the outlet box.
Scope of ceramic products is much broader than might appear at first glance: it's furnishings and garden sculpture. Often, it becomes the organizing principle ceramics in the formation of environmental space of man: the office, premises or landscape. Products made of baked clay are widespread and very ancient form of folk crafts. It uses readily available natural material. Different purpose glassware – pitchers, bowls, plates, jars, pots, and toys are the most typical products of the national production. Ways of making art pottery in the history of these products have undergone some changes.
Hand-molded vessels remained in some areas of our country so far. But the desire to improve and work to achieve an ideal shape of the vessel collected led to the use use the potter's lathe range, which stretches from a piece of raw clay subordinate to the principle of symmetry of the object. Subsequent changes in pottery of the machine for the transition from the rotation range of hand to foot drive, and then to the electromechanical motion. It works preserved to this day. At current production potter's lathe significantly supplanted by casting in plaster split forms. The liquid clay mass – slurry is poured into a form that absorbs moisture with plaster, the walls of the form as it is printed next vessel. Excess slip is poured in advance, leaving only a small layer of the masses. The resulting intermediate product is additional second jobs: the attachment of the handle and the spout if it is tea, trimming seams from the casting, decorating scratching, smoothing the surface – polishing, etc.
All these operations are performed on the raw shards. Upon completion of their product is dried. Art pottery is then fired. The concept of "art pottery" includes all types of products that run out of clay. Depending on the primary source of raw materials and additional components are terracotta, majolica, faience, porcelain, with the differences in appearance and on how to decorate. Terracotta has a light reddish-brown clay, which is not glazed. It is easy to receives moisture, so is mainly used for decorative items. I want to share with you his research in the field of artistic ceramics presented Svetlana Khitrovo on its site Art ceramics exhibited Svetlana Khitrovo has many Advantages. Ceramics can be in the interior of the house ipolzovat office villa. Pottery has artistic value as the author prepares it by hand. Sketches were taken from photographs of ceramics from the archaeological work on the basis of excavations of ancient settlements. Its products are presented in the form of whistles. Tin whistle since ancient times and even to the present time is a talisman against evil spirits dwelling and other vermin. Finally, just beautiful ceramics, Svetlana and original.