Projects and experienced first instances of jet aircraft with variable geometry wings appeared during the Second world war: in our country the project of this aircraft was developed V. V. Shevchenko and German company “Messerschmitt” even built experimental aircraft Р1101, which went to the Americans as a trophy. On the basis of the firm “bell” has created two pilot cars X-5, taking into account the requirements of the U.S. air force to the aircraft-attack aircraft. The first is constructed from X-5 first took to the air July 20, 1951 two years later, on may 19, 1953, in the United States flew another prototype aircraft with variable wing geometry — Jaguar XF10F-1, proposed by the Grumman American fleet. The tests confirmed a significant improvement in flight performance of the aircraft due to the wing using variable geometry, but the final results of flight tests were negative. And only eleven years later, on December 21, 1964, made the first flight of the aircraft with variable wing geometry XF-111A, designed by the firm “General dynamics”, accepted in 1967, the U.S. air force.
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In the Arctic tundra and in Antarctica, the snow-capped mountain slopes and in the forest most of the year working tirelessly snowmobiles — reliable support person. The combination of a lightweight gasoline engine, V-belt CVT and rubber tracks — that is, essentially, the whole wisdom underlying most of these machines. At first glance, not too difficult combination. But it took a lot of time and labor to make this “Troika” to work together.
The temperature of the soldering iron usually adjusted using Later. However, such devices are bulky, inconvenient for transportation. Significant benefits in this respect have electronic regulators. Thyristor controller — scheme presented in figure 1 — changes AC voltage at the electric soldering iron with power up to 50 watts 110 to 220 V.
Every year our industry produces more and more cars. Today while driving to meet a man of almost any profession — the engineer, doctor, architect and worker, farmer and teacher. On how to properly operate the vehicle, i.e. when to change the oil, how to choose candles, what to do in case of certain faults, see the respective manuals and instructions. About the little things, facilitate the daily care of the motorist, they write, unfortunately, is not enough. The purpose of this publication is to some extent fill this gap.
Created wristwatches that do not require vision or hearing. Instead of traditional watch hands, the time is indicated by two balls – one indicating minutes (top), and one indicating hours (side). These two balls are connected with magnets of the movement. The watch is made so that even if the balls are moved when touched, they are easily returned to the correct time with a gentle shake of the wrist.
1888, the coronation of Wilhelm II, last Emperor of Germany, claim to very much, which has plunged his country into the bloodiest in the entire history of the Earth, war ended in disaster for his country and for himself. The new Emperor considered himself a great connoisseur of the fleet and even the compiled projects of warships (even if only conceptual). It is not surprising that already in the first years of the reign he completely rebuilt the organization of the naval forces, unchallenged which lasted 20 years under the auspices of the land of the generals.
Mushroom pickers, fishermen and tourists have seen many times on the narrow paths of the forests of the Moscow region a strange structure that appeared as silently and as noiselessly disappeared with a flash of shiny rims of Bicycle wheels. And over these wheels stood a pile of backpacks, bags and baskets. Told that unusual bike has three wheels, but they are located — in contrast to the well-known tricycles — not a triangle, and to each other in one line! We’ve been looking for an unusual bike and its Creator.
Once in the journal “modelist-Konstruktor” I read the article “the Farmer’s sloping field.” The air route is very much needed in the highlands. But in nature, there are many horizontal areas, overgrown shrubbery, marshy ravines, through which transportation of cargo is also very difficult. In addition, many farms have often to move cargo over short distances — for example, on farms. For this I suggest using a rope conveyor. It is much easier air road, offers the opportunity to assemble the system on their own, for example, in the workshops of the kolkhoz or sovkhoz.
