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…
“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…
The kerosene primus stove «Rekord» had been lying idle in my garden shed for a long time. At first I wanted to throw it away, since kerosene is hard to find even in the countryside nowadays, but then I changed my mind and decided to convert it to a more readily available fuel—gasoline. However, you Read more…
Most city dwellers living in apartment buildings usually dry their laundry on balconies and loggias. Ropes stretched low get in the way of placing flower boxes, a deck chair or other leisure items on the balcony; ropes stretched high cause inconvenience when hanging laundry and do not always ensure the necessary safety. All these drawbacks Read more…
For apple juice lovers I can suggest a homemade juicer that is simple to make and does not require large investments. It is built from an old washing machine. Factory juicers have low output and poor reliability because they contain many plastic parts. My homemade unit processes a bucket of apples in 7–10 minutes. To Read more…
Quite recently, trailers for passenger cars appeared on the roads of our country. This new vehicle very quickly gained the widest popularity, and during vacation periods on highways one could observe lines of cars with trailers in tow. What designs are there? Trailer-dachas, “folding beds”, motor boats and yachts on trailers, self-propelled trailers — ground Read more…
I have been subscribing to the magazine «Modelist-Konstruktor» since 1980, so I am a long-time reader. I have decided to write to the editorial office for the first time. Since school I have been keen on designing and making various devices, mechanisms, and tools. Sometimes I manage to come up with and build something that Read more…
Drop-leaf tables have been known for a long time and they are consistently in demand because they take up little space. But buying a table of the right size in a store is not always possible, so you often have to rely on your own hands and ingenuity. The proposed table is made of ash. Read more…
No matter how much humorists joke about repurposing items that have served their purpose, a DIY enthusiast’s soul won’t allow them to throw away something that could still be useful around the house. I’d like to share such an experience of using an empty aerosol canister. Indeed, it’s a pity and not rational to throw Read more…
