Rationalization proposal Lyubertsy student of secondary school № 42 of Yuri Furmanov. How to ensure all novice turners cutters? Almost every school workshop this problem exists. The HSS tools quickly become dull and break in inexperienced hands boys, standard tool holders with brazed them on the plates from hard alloys are not suitable for school machines high. The same applies to the most affordable cutters with exchangeable sintered plate (durable, able to withstand the most critical conditions).
“SCHOOL” CUTTER
The aircraft short takeoff and landing An-72 was created to solve special military problems. To increase the lift coefficient of the wing engines located on its upper surface. However, their gas jets blown part of the airfoil and flaps, using the Coanda effect. An-72 is equipped with two turbofan engines D-36 takeoff thrust of 6500 kgf.
The compressor is one of the machines, which are frequently encountered in various production areas. Among the vulnerable sites that require durability and long remained a piston ring. It wear led to the deterioration of integrity, performance and efficiency of the unit.
And so Germany entered the First world war, glorified “submarines of the Kaiser” as the most formidable weapon in the war at sea. Entered, having … only 28 submarines, half of which, as it was considered unlikely to have been able to act out of sight of shore, and the rest were barely able to operate close to even the nearest East coast of the UK. And any ideas on how all this “wealth” to use. Moreover, much improvement in the near future and not expected: in the program of development of the submarine fleet, adopted in 1912, it was decided to build 70 units. At first glance, quite a lot, but 36 of them were intended for the defense of the German Bay and 12 to cover the direct approaches to the bases, first of all, to the Keel, 10 had to be “material reserve”. And only 12 boats, according to the Admiral-staff, led the naval operations of the German fleet was originally allocated for active operations. Not later than in the North sea. Was also surprised by the slowness of time: the 70 units was supposed to have in the ranks already… in 1919! Germany almost all put on the development of the surface of the high Seas Fleet, which was to crush the British Grand fleet in a decisive battle at the expense of higher-quality ships and training of personnel.
Because of the diversity of karts, built by athletes and produced by the domestic industry, the most advanced in design and for a number of technical characteristics is currently cards KS-76 designed in TSKTB DOSAAF of the USSR and manufactured by the Leningrad production Association “Patriot”.
Innovators of the Moscow machine-tool plant named after Sergo Ordzhonikidze developed an unusual screwdriver, equipped with a booster with transmission ratio 1 : 6. This means that one turn of the handle of the screwdriver results in six turns of the tightening screw. Such a screwdriver can be successfully used in small-scale and serial manufacture installation and other operations on mechanical parts, fitting and mounting work with mounting screws when fixing various caps, visors.
There are many simple homemade designs boat, but mine is probably among the most simple. To make it was not difficult: me and my friend Sasha Silantyev took this for two days. And the work was as follows. First of all, with the usual clamshell removed the tarp and springs, and also, cut the rivets, the arc of the headrest. For the longitudinal framing members used a tube from another old clamshell. To blend with a transverse pipe of the framework we came up with, we think, quite an interesting way. After cutting at the end of each longitudinal pipe is made semi-circular notch. At the point of joining on the transverse elements wound through three or four layers of textile adhesive tape and placing the longitudinal pipe, pulled the frame to a steel cable.