“Butterfly” — that is the name of this sports dinghy. Thousands of similar little craft sail the waters of lakes and reservoirs in many countries of the world. Boats of this class are especially popular in Czechoslovakia and the GDR. These sailing boats are not monotypes, that is, they do not have a strictly defined Read more…
In clouds of snow dust, unusual machines rush down from a high mountain — they look like bicycles, only with skis instead of wheels. On the riders’ feet are slalom boots and skis as well — short ones, with rigid bindings. The outfit is a dense leather jacket, stretch pants, a hard protective helmet, thick Read more…
Two or three intense strength exercises can be more effective than prolonged unloaded gymnastics. A horizontal bar or parallel bars are good for this — equipment clearly not intended for an apartment. However, they can be successfully replaced by a simple device proposed by the Hungarian magazine “Ezermester”. It takes up little space, is versatile, Read more…
Some models of the bicycle electric generator, better known as a “dynamo,” have serious design flaws. For example, the plain bearings in which the rotor shaft rotates need periodic lubrication. And their design is inconvenient to disassemble. Once the lubricant is depleted, increased friction appears, along with wear of the bearing bushings and of the Read more…
The proposed design is a five-section three-seat boat with a carrying capacity of 320 kg. On tourist trips, once hauled ashore, it turns into a fairly spacious “tent,” especially if a piece of polyethylene film is thrown over the top. The boat is so simple that even a person unfamiliar with boatbuilding and having only Read more…
When designing this all-terrain vehicle, amateur designer L. Antokhov from the town of Kirishi in the Ryazan Region aimed to create an all-season, reliable and highly traversable machine with small dimensions and mass, fitted with a closed cabin for three people — a driver and two passengers. The result of the work was an ATV Read more…
Submersible vibration electric pumps “Malysh” and “Rucheek” are a common choice for autonomous water-supply systems of small households, including farms. They are compact, convenient to operate, and reasonably priced. But there is a problem: such pumps cannot cope with subzero temperatures. When the pump is switched off in winter, water is trapped in the supply Read more…
that we invite you to build are quite safe and stable, despite having a single runner. The basis of the design is a spruce or pine board measuring 40X300X650 mm. It is even better to take several boards 30—35 mm thick, joint them to each other and glue them together, applying plywood cheeks (4—6 mm Read more…
Thrifty householders have always had a tradition of putting up various pickles and jams for the winter, and today it is especially relevant: food prices rise, while purchasing power lags behind. At the same time the country is experiencing a dacha boom, and plots are filled with plantings, greenhouses, fruit trees, and berry bushes. The Read more…
It is never superfluous to have in your own car, in addition to the cigarette lighter socket, also a service connector adapted for USB or even miniUSB. Such adapters come in handy in many cases, for example for powering PC peripherals, charging mobile phones, event video recorders, and everything that is designed to be powered Read more…
