“From work saw burn until white!” — wrote Vladimir Mayakovsky in his poem “Whom to be?” Meanwhile, heat the cutting tool in the first place means that he is dull. In this case, the joiner, as of old, takes padpilot (triangular file — in modern terminology) and manually sharpening the teeth of a handsaw. Much hard work and unproductive work! But maybe, and this operation can be mechanized? There are also sharpening machines for milling cutters, disks of circular saws… However, here’s a review on the machine, developed by ninth-graders of high school № 28 of Ust-Kamenogorsk city under the leadership of teacher A. A. Boytsov: “bench grinder will find wide application not only in school workshops, but in the joiner shops of the construction companies and carpentry teams on any construction site. The machine is easy to manufacture and allows you to sharpen the various woodworking tools — hand saws, the blade semi-circular and chain saws”.
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The creation of remote electronic devices control various actuators were promising direction in the radio even during my “pioneer” childhood in the 1980-ies. Then, under the guidance of mentors, we enthusiastically gathered such equipment using discrete components. She usually had a range of 5 — 6 m and it barely fits in the box size 300х300х150 mm. If it was possible to assemble at least a fortnight instrument remote control model boats or aircraft with a transmission range of teams at 20 — 30 m, it was considered from us (10 to 12-year-olds) with great success.
Snow scooter we recommend that you do, will give the opportunity not only to descend from the snowy mountains, but to engage in the slalom. To build it is not too difficult. Well, of course, if you manage to use the weld, but in a pinch you can do without it, replacing the weld bolt.
Four-engine passenger turboprop aircraft L-188 was created under the requirements of the airline “American airlines”. In June 1955 the project was chosen from among submitted various aircraft manufacturing firms in the USA. New car interested in other airlines. The prototype of the “Electra” took to the skies on 6 December 1957, the serial production at the plant of the company “Lockheed” in Baer Bank began in October, 1958 January 12, 1959 the aircraft, “Eastern air lines” made the first flight from new York to Miami.
We have long been accustomed to the prefix “electro” in modern musical terminology. Appeared such names as electric guitar, electro, and even the ensemble of electronic musical instruments. Many of the tools have become more rich shades of sound, when a duet with them stands electronics. Bypassing it is only people’s tools. Plays a role, apparently, the fear to violate the purity of the already established sounds. But this is not so. Even such a simple instrument like a balalaika, will be able to gain more power, become a true soloist of the orchestra of folk instruments, if you supply the pickups. Today’s publication is devoted to one of the variants of the “electrification” of the balalaika.
Do not consider it shameful to use a good development designers and lovers they share the magazine. But, armed with their interesting ideas and technical solutions, and the very creative approach. So for the treatment of potato between the rows was made cultivator-Hiller. He arranged for motorcycle scheme, when working on (cultivator or Hiller) is located between the two running “in the tracks” wheels: guide (“sulker” from children’s pedal cars) and leading (of the scooter Tulitsa).