DINGHY “GOLDFISH”

According to the drawings published in our magazine, readers from the city of Rovno A. Current and V. Rumyantsev built Dinghy “goldfish”. But their design turned out to be faster and more stable due to the increase in sail to 5.5 m2 (statement of headsail on the bowsprit) and change the length and width of Read more…

IN THE OFFICE — A STRANGER!

IN THE OFFICE — A STRANGER!Depressing statistic of the attacks on the secrets and the assets of the firms, organizations, entrepreneurs (and ordinary citizens) makes it necessary to take appropriate countermeasures, in particular, to acquire security devices and even systems. The proposed technical solution is one of them. Responsive to the appearance of outsiders (outsiders) in a protected area, this electronic guardian offices, apartments, warehouses and other premises in my own way belongs to the rightful owners and employees have “radiolocate” in the form of trinkets.

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“BRACELET” DISABLED

Elderly person or disabled person to raise the fallen or vyskolznula from the hands of the stick is always a problem. Easier to recover from this situation using a simple “bracelet” (from a leather strap, cord or tape) threaded into the handle hole, as shown in the figure.   V. GOLOVASHIN, Rybnoe, Ryazan region.

THE TRUNK GUARD

RACK-GUARDKrysheval the trunk will be of interest to owners of cars that do not have a garage and have to leave to spend the night steel “horse” under the open sky. Most of them equip their vehicles with security alarm. However, it often works even from a passing truck or a number of powerful peals of thunder, breaking the night’s rest of residents.

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RIVAL HELICOPTERS

RIVAL HELICOPTERSIn the late 1950 O. K Antonov as chief designer of OKB-153, located in Novosibirsk, invited the leadership of the air force of the CAF and the draft aircraft short takeoff SLE-1. In the diagram of the machine catches the eye first of all, empennage mounted on two thin beams. Direct highly mechanized wing with flaps, drooping ailerons and an automatic end slats are two radial air-cooled engine AI-14R. It is through these engines takeoff power of 265 HP was able to put into practice the intentions of the designer.

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LIGHT TELEGRAPH

Someone who knows Morse code or just going to study it, can build a simple device, shown in the figure. On a plywood Board install the battery B and the lamp L of the flashlight. Contactor In the manufacture of contact plate faulty relay. Now connect the parts to each other by wires. To increase Read more…