The operating life of lead acid batteries largely depends on their proper operation. According to technical conditions, it is unacceptable to discharge one section below 1.7-1.8 V. Charging with a current significantly exceeding 1/10 of the nominal battery capacity, expressed in A*h, causes the electrolyte to boil. This happens, for example, when the relay regulator Read more…
Most velomobile designs feature a rigid connection between the frame and wheel axles. This places increased demands on the quality of a number of parts that cannot be produced at home. The relatively high seating position of the rider on most velomobiles impairs the stability of the car when cornering. Due to their large dimensions, Read more…
The All-Union Competition “Small Mechanization”, held by the editors of the magazine “Modelist-Constructor”, has gained wide popularity among the creators of small-sized agricultural machinery. Many of the designs presented by its participants were awarded (see “M-K” No. 4 for 1987), and a number of developments were recommended by the editors for display at the Central Read more…
I probably won’t surprise anyone by saying that preparing firewood for the winter is one of the most labor-intensive tasks for a rural resident. Of course, it’s not at all easy to cut several cubic meters of wood! Is it possible to turn my old motorcycle into an assistant? The idea seemed tempting, and I Read more…
Among the responses received to the All-Union competition “Small Mechanization” held by the editors together with the Central Committee of VOIR, there are many letters asking for the publication of designs for household installations using wind and solar energy. The interest in these devices is understandable. It is caused by the vital need for this Read more…
Many do-it-yourselfers gained initial experience in automobile construction by converting motorized strollers. And in general, the entire domestic “automobile” industry grew up on vehicles with motorcycle engines. Moreover, a beginner is attracted to this technique not only by the availability of purchasing initial components and assemblies, but also by the relatively short period of time Read more…
Mechanical saws produced by industry certainly make the work associated with preparing firewood for the winter easier. But most of them have one drawback: during operation, the entire unit along with the motor has to be held in your hands, which not everyone can do. In the proposed homemade design, the entire power plant is Read more…
The pedal boat is a machine that has long been mastered by technology lovers, both young and old. Two light floats connected by a simple bridge, and on it is a frame from an old bicycle with a saddle, handlebars and pedals. The propeller is a homemade propeller. Get in and go wherever you want: Read more…
If the electric iron has served its purpose, but the heater in it is still working, use it in a new role – a vulcanizer. It’s not at all difficult to do this. Cut a bracket from five-millimeter steel (see figure), weld a cylindrical boss to it on top, and a strip of metal 50 Read more…
Many letters received by the editors indicate the great interest of readers in the “Small Mechanization” competition held by the magazine. And this is no coincidence. Since there is still not enough equipment produced by the industry, gardeners and owners of personal plots make walk-behind tractors on their own. Sometimes you get surprisingly simple and Read more…
