He in particular proposed to heat the top of the rod in the bushing to level the contact pressure of the rod and the bushing of the samovar tap. The samovar inventors, in their own way, coped with the uneven wear and tear, having carried out the "twist" on the bottom with the protruding butt, and at the top reduced the stiffness of the bushing-it had a groove on the outside. Equal wear and differently: opening and closing the tap, they make a full turn. If the crane is not capable of such a turn-the grip touches the body, there will be no uniform wear. The handle of the crane, as a rule, is massive enough to hold the rod in the sleeve under the pressure of water. This samovars in Moscow masters were like medieval architects who put heavy statues or towers on the fortress walls to level the forces acting on the structure. At the same time, the crane handle with its considerable weight is fairly openwork and usually resembles a feather, a lattice or a branch.

The samovar as a heating unit

Coal will steadily burn, more precisely, burn out if there is traction. It appears when the air flow at one end of the pipe heats up, and on the other - it cools, which happens in the samovar in Moscow. The thrust is also facilitated by the narrowing of the output end, which in turn reduces heat losses. Modern scientific discipline-gas dynamics calls such ways of dispersal of an air stream effect of thermal and geometrical nozzles.

The best fuel for a samovar

Many believe that the samovar must be heated with pine cones or birch rays. However, the best fuel for a samovar is wood, in which the carbon content exceeds 95%. The amount of burned carbon, and consequently, of the heat released, is proportional to the consumption of oxygen, so the burning intensity can be regulated by the supply of air. The samovar is restricted by the slits in the grate and the resistance of the fuel layer. Burning should not be too intense, otherwise heat loss increases. As the fuel burns out, the thickness of the formation decreases, and the burning intensity increases. Charcoal burns with a short flame of a reddish hue. After the combustion of charcoal, relatively little ash is formed, which is easily removed. Can a samovar be heated with firewood?