Aviation and missile firm North American (USA) has been building aircraft since 1934. During the Second world war, the firm produced about 42 700 aircraft, among which were such well-known cars like a fighter P-51 and b-25.
(The end. Start at # 5 and 11 ’02)
The carrier rocket “Soyuz-2” spacecraft “Soyuz TM-12”. The article “Soyuz” space survivor” (“modelist-Konstruktor” No. 5’02) it was told about creation and tests of the spacecraft and the carrier rocket, which became the prototype for a whole series of these ships and missiles. Their modifications were successfully used for manned flight programs of national long-term orbital stations “Salyut” and “Mir”, and now — to fly to the International space station (ISS). In the same issue of the journal was given detailed drawings of the carrier rocket “Soyuz-2”.
Six years of the Second world war has clearly shown how dangerous the enemy fleet became the aircraft. Even such innovations as radar control anti-aircraft fire and radar fuzes, are unable to fully protect allied ships from the Japanese kamikaze and the German glide bombs. Required tool, capable of hitting aerial target with the first volley at max range. Artillery to cope with this problem could not, therefore, immediately after the war, the U.S. Navy adopted the program of development of antiaircraft guided missiles. The work was carried out on a broad front. At the same time developed systems of three types: long (up to 120 km) steps — “Teylos”, medium (20— 35 km) — the “Terrier”, and is relatively small (approximately 17 km) — the “Tartar”.
Vacuum cleaner — large home hard worker: in addition to his primary duties, he can whitewash the ceilings, painting the car, spray the flowers. However, it is possible to “teach” to another profession, and fabricated a simple device by which you can “wash” of various carpets, placing them on the open plain.
needed for anyone who is keen on constructing of measuring equipment and equipment for radio control models. Simple circuit universal wavemeter, shown in figure, is a conventional crystal radio set, whose output is headphones included the arrow measuring device ИП1 with the DC amplifier transistor T1.
Ulyanovsk automobile plant, since 1954, specializiruetsya on the issue of AWD cars, buses and vans. In 1972, the plant mastered the production of all-terrain vehicle UAZ-469 (UAZ-3151) used in the army, and agriculture. New market requirements have prompted designers and manufacturers to create new, modern model of the SUV called the UAZ-3160. This car has received a more powerful engine, center differential, spring suspension of the front wheels and a metal body.
In the old days, when required to perform switching in the electric circuits when the voltage rises to a certain threshold, resorted to the use of polarized electromagnetic relay. However, the substantial size and weight, lack of reliability of the kinematics and contact pairs severely limited the use of these devices. Now in their place came a miniature non-contact thingies called discs. This four-layer semiconductor diodes whose structure is like a two transistor: p-n-p and n-p-n type, with the base of one is connected to the collector of the second, forming the internal positive feedback (Fig. 1).
Scout-bomber P-Z. Created in the late 20-ies of the last century, the Soviet biplane R-5 construction.N. Polikarpov for several years was a classic type of reconnaissance aircraft. In the international aviation contest in 1930 in Tehran, which was attended by the best companies of England, France and Holland, our air reconnaissance took first place.
One way to reduce interference in digital circuits, as is well known, is to install the ceramic capacitors in parallel with the power rails. The closer to the contacts of the chip capacitor is, the more effective his work is.
The idea to use as a vehicle motor wheel is tempting. She became interested in members of the laboratory design of compact machines Cute Siberian branch of the USSR ninth-graders Sasha Titarenko and Vitaliy Molchanov. They were attracted by the compact device, no transmission and therefore no loss of mechanical energy in the intermediate links, that is, a higher efficiency motor wheel converting input electrical energy into mechanical energy and the transfer of the latter directly on the propeller — wheel.