Long-term storage of fresh vegetables and fruits is quite a challenge, especially in urban conditions. After carefully studying publications on mini-storage units («M-K» No. 2, 1984, «M-K» No. 8, 9 and 11, 1985), I must note that all these designs have rather complex thermoregulation systems and are made from materials that are rarely available in Read more…
Arch, gate, wicket gate, fence, pathway — as a rule, all these elements of landscaping a new homestead or garden plot are usually not done first: materials, building parts, tools, seedlings are brought in, the plot is processed, a structure is erected — there’s plenty of work, and the fence simply gets in the way Read more…
It’s good if a child has their own table for games and activities. But it would be even better if the table always matched the child’s age, or more precisely — their height. The table design proposed by the Hungarian magazine «Eszermester» allows you to adjust its height. This is achieved by making the legs Read more…
Over the twenty years since the collapse of the Soviet Union, we have become accustomed to running to the store for ready-made products at the slightest thing. The managers who appeared in the country in huge numbers, absorbed by the thirst for profit, today don’t even know how to hold a hammer. This is also Read more…
When improving the operation of an ordinary greenhouse, people constantly face new and new problems. What is the essence of the main ones? First of all, plants grown in greenhouses require certain temperatures of air, soil, and water, which must change depending on the season and the needs of the plants. Even the same plant Read more…
Nowadays the amount of paper waste has increased sharply, mainly due to “disposable” printed matter: besides newspapers and magazines, mailboxes are filled with countless promotional leaflets, various election campaign materials and the like—all free of charge. It would be a shame not to put such gifts to use. The “Master” club figured this out long Read more…
The concrete mixer is designed to produce concrete mix or cement-sand mortar. Its volumetric output is 15 ten‑liter buckets of mix in the ratio: 1.5 buckets of cement + 4.5 buckets of sand + 9 buckets of crushed stone (water not included) per batch, with a cycle time of 15 minutes (5 minutes each for Read more…
I made this soil-working tool to lighten the hard work, since digging the ground with an ordinary shovel—constantly bending and straightening—had become harder and harder over the years. The device itself is a modest invention (an author’s certificate was obtained for it), but it is useful: now my back does not hurt even after long Read more…
“The school automatic weather station, constructed by students of secondary school No. 5 in the city of Klin, is of technical interest. The precipitation sensor and its registration on the control panel are originally conceived and implemented. The wind direction and speed indicators, as well as the thermometer, are interesting. Such weather stations can also Read more…
Biogas. Used as far back as ancient China and then “rediscovered” millennia later as a “non-conventional, environmentally clean energy source of the 21st century,” it is attracting growing attention in our country too. Evidence of this is, in particular, the steady rise in publications related to biogas—including in the pages of Modelist-Konstruktor (see, for example, Read more…
