As is well known, sun, air, and water create the most favorable conditions for recreation. So it is no surprise that on a hot sunny day so many people gather on sea beaches and by the banks of a river or pond that there is literally no room to spare. Unfortunately, well-equipped beaches are few. Read more…
Compactness, maneuverability, and good traction characteristics are the undoubted advantages of the single-wheel tractor built at the young technicians’ station in the city of Novotroitsk. They were achieved by using a layout unusual for walk-behind tractors — “wheel–motor” — which gives the machine minimal dimensions and a simple transmission. It is no secret that large-diameter Read more…
This security alarm device (SAD) is intended for automatic sounding of an alarm signal (electric bell) in case of unauthorized entry of outsiders into a protected premises — an apartment, a country house, or a garage. It features higher noise immunity and the absence of false alarms. The device is powered by a 12-volt battery Read more…
Perhaps in every adult’s memories, childhood winter fun is inevitably linked with sleds. And one can say with confidence that even today you will rarely find a home without them: they still serve children, and adults too — to take a toddler to kindergarten, or to carry a small load from or into the house Read more…
We named our potato digger a screw-drum digger after its two main working elements. It is intended for harvesting tubers on educational and experimental plots, as well as household plots and gardens. That is why an electric motor is used as the drive, although of course an internal combustion engine of suitable power can also Read more…
No matter how popular flower beds are among flower-growing enthusiasts, they usually differ little from ordinary garden beds. And this impression is not saved by attempts to refine them with all sorts of brick borders, fences made from random pipes, or, worse still, car tire covers. Besides, such flower beds have a permanent “registration”: they Read more…
Many people keep various pets, and spending time with them brings plenty of pleasant moments to both children and adults. However, there are also animals that constantly live near humans and often visit their homes (for example, mice and rats). Yet they are uninvited and even harmful guests, since they are considered (and, probably, not Read more…
Prepared cement mortar needs constant mixing, otherwise it hardens quickly. But that is easier said than done; doing this work by hand is extremely tiring — it is hard to lift a shovel full of mortar. How can one try to use one’s strength more efficiently? That is how this labor-saving device appeared in my Read more…
For many years I have been a regular subscriber to “M-K” and find in it a great deal that is interesting and useful. I hope my experience will also be of use to other readers: I want to share my thoughts and practical recommendations on making and operating a tandem bicycle. I built such a Read more…
It is no exaggeration to say that the most important part of a glider-autogyro is the rotor. The autogyro’s flight qualities depend on the correctness of its airfoil, on mass, centering accuracy, and strength. True, the unpowered craft on a car tow rises only to 20–30 m. But even flight at such a height requires Read more…
