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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The device is assembled on the proposed scheme allows to control the power consumed from the DC voltage source. Indication power led is a color display and sound. When using in-vehicle device control the power consumption of lighting devices and additional equipment replaces the voltmeter, connected in parallel with the battery.
After a protracted and rather overhaul purchased the manor house, it was found that to check have not only a “bare walls”, but with almost empty pockets. I think that in such a situation may be some readers of the respected journal, so I want to share with them my experience (From my life experience I know in Russia do not earn so much, how many you can save) So I had to switch to the manufacture of furniture And started with a headset for the hallway, or rather, with the individual items that formed subsequently to complete the set.
Young metallurgists, participants of the exhibition NTTM-78, developed a key for their production needs: screwing graphite electrodes Ø 300 mm electric steel furnaces. However, they believe that the principle laid down in its design, applicable and to create a tool with the other, but a close target (for example, for unscrewing the studs).
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.
