GARDEN IN A BOX

Usually vegetable seeds, berry and horticultural crops are kept in bags, which is not very convenient. Much handier to keep them in a special box with drawers. It is easy to make from vacant matchbox boxes: simply glue them together.   V. GOLOVASHIN, Rybnoe, Ryazan region.

TRICYCLE TX-200

TRICYCLE TKH-200On the roads of Kharkiv, there was one car with the familiar letters of the COI — “Club eternal”. The automotive laboratory of the centre of scientific and technical work is headed by the laureate of many competitions NTTM Valerie L. Taranukha. This time in the neighborhood of the letters KVP caused the index of the TX-200. And the car, unlike all previous is built via a three-wheeled configuration, using the whole back of the scooter T-200. In this part is the main “rational” of the new machine, created the “Club of the eternal search for” V. L. Taranukha, together with the candidate of technical Sciences Y. S. Hojnowski. Hence the index — TX-200.

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SCREEN FOR BATH

SCREEN BATHA true master of creativity will suffice even in the bathroom. If your intention is to close the bottom of the bath screen – not in a hurry for him to shop. It’s a simple device if you want you can do it yourself. What matters is that you had minimal DIY skills and the desire to spend a few hours of free time. However, in this case, you do not get to do without going to the store and extra expenses but something can still be saved.

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THE ELECTROLYTE FOR THE BATTERY

ELECTROLYTE BATTERYHow to make the electrolyte alkaline batteries? What are components, what should be the charging current, how long to charge? Electrolyte — aqueous solution of potassium hydroxide with a density of 1,19 — 1,21 g/cm3 with the addition of 20±1 g/l of lithium hydroxide monohydrate (Li0Н.H20). (This corresponds to GOST 9285-59. At -20±1°C or -40±1°C batteries should work for an aqueous solution of potassium hydroxide with a density of 1.26 — 1.28 g/cm3 without addition of lithium hydroxide.)

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BORING FOR RADIO

DRILLING FOR THE RADIO AMATEURWhen faced with the need to drill numerous fine holes in printed circuit boards for electronic devices, it was found that a power drill in this case is not such a good assistant she is loud, and the power of it excessive. Then decided to make a small tabletop drill press is more suitable for such work. The present machine has a small size, low power consumption and, importantly, virtually silent — you can work even when all the household slept. And drilling the holes with diameter from 1 to 6 mm permissible even in aluminum workpieces.

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DESKTOP TREBUCHET

DESKTOP TREBUCHETMany of us have been fascinated by the exploits of Ivanhoe, Lancelot, read about the struggle and death of evpatii Kolovrat, admired the stories of John. P. P. Tolkien. These interests were awakened the interest in the distant past, gathered like-minded people and dreamers in the clubs history and reconstruction.

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FIGHTING A MIRAGE

COMBAT Fighter-interceptor, the Mirage IIIC. In 1953, the French air force announced a competition to create a light supersonic fighter-interceptor. Virtually all aircraft manufacturers and enterprises of France took part in it. Southeast Association – Societe Nationale de Constructions Aeronautiques du Sud-Est (SNCASE) built fighter-a tailless “durandal” with a triangular wing. The power plant consisted of a turbojet Atar 101F with a thrust of 3,400 lbs and a SEPR rocket engine with a thrust of 825 kg. southwest – Societe Nationale de Constructions Aeronautiques du Sud-Ouest (SNCASO), has proposed an unusual Orthoptera car SO.9000 “Trident”, with two turbojet engines of Turbomeca “Marbore” II with a thrust of 400 kg each and three-chambered SEPR rocket engine with a thrust of 3750 kg.

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MULTI-SPEED FLOATMATH

MULTI-SPEED FLOATMATHOn our market there are now a lot of imported bikes with a large (over a dozen) number of speeds. But fascinating these machines are, perhaps, only youths. Experts understand that to take full speed full still impossible: difficult even to choose the correct gear and often switch them on the go is not only tiring but also unsafe. Because switching is required usually in difficult driving conditions or cornering, when the hands should firmly hold the steering wheel, and one of them is necessary to manipulate the lever. As you know, the cars are only 4 — 5 speeds, and the drivers prefer to upgrade to automation.

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