The Soviet-Finnish war began on 30 November 1939 and ended on 12 March 1940. All this time our units had to overcome the fortifications of the “Mannerheim line”, created on the Karelian isthmus. This “line” became the most significant fighting. Rasstalas front is 135 km, it had a depth of defense around 95 km, and the Main defense line consisted of strong points, just within which it was built 800 wooden-earthen fire facilities Bunkers and 280 long-term firing installations (Pillboxes). All of them, as well as the other positions were covered by the first anti-personnel obstacles of the dozens of rows of barbed wire on concrete base. They were followed by anti-tank obstacles, saturated ditches and scarps. Space between them in huge quantities were made nadybali in several bands. Tanks could not pass, and the Marines had to overcome many roadblocks often three or four layer fire to undermine them. Such a difficult task sometimes allowed T-28 tanks, fire their 76.2 mm guns destroying dragon’s teeth. They could also deal with small Bunkers.
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The so-called unusual mechanism established at the Irkutsk industrial College for tightening heavily loaded threaded connections of large diameter. Anyone who has had to screw up the nut of the bolt, under the head of which is placed a rubber washer must necessarily have resorted to little tricks: when it’s getting on bad, just click on the head — it will dig into the rubber, the bolt will move forward and rotate the key will be much easier. Paradoxically, this principle was put to the Irkutsk innovators in the basis of the work of this mechanism. When tightened heavily loaded threaded connections of large diameter Jack allows you to stretch the bolt or stud within the elastic deformation that provides the subsequent free rotation of the nut.
A cargo aircraft C-27J “Spartan” set up jointly by the Italian company “Alenia Arepas” and the American “Lockheed”. Its predecessor—the Italian light military transport aircraft G. 222″, Alenia” made its first flight in 1973 and produced until 2000, Only built 124 machines of this type. Ten of them are operating in the USA under the designation C-27A.
The best Amateur-built glider, took part in the competition “Dombai tops” in 1978, was named “Sokol-2”. Its Creator — Leningrad master of sports V. D. Mikhailov, a renowned specialist in the design and making of yacht sails. So it is understandable his desire to use when constructing the glider, the latest achievements in the field of sailing. As a result, the quality of the dome “Sokol-2” had no equal among the devices flying over the Caucasian peaks.
The fuselage of modern rezinomotornaya model aircraft usually consists of two parts: the power (it houses the rubber motor, is attached to the lug screw, wing) and the tail boom carrying the tail surfaces. The power part usually is a thin-walled pipe of aluminium alloy, plywood or fiberglass. Tail boom made in the form of a light truss or stacked monocoque construction with hard balsa covering.
