As we know, Germany in the beginning of the Second world war there were two types of medium tanks: Pz.HI and Pz.IV. Both cars were created in the mid 1930-ies very close to the reference, which led to the creation of two almost identical in weight, size and booking, but differing in armament and in the end — a completely different construction machines. It is difficult to give an explanation. For example, a base weight was 15 and 18 t, respectively. Significant differences were only armed with one machine had to carry a 37-mm, and the other 75-mm gun. Where it would be logical to take one tank, with two arms, as done, for example, in the UK and partly in the USSR. In any case, such a decision would entail much less costs in the future.
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To rocketmodeler it is no secret that the easiest way to measure the height of the flight model triangulation method. It is based on the measurement of the angles between line of sight and reference planes. Is the choice of the reference planes and the measured angles is largely determined by the degree of difficulty of the subsequent trigonometric calculations of the height.
The weight started with the fact that the employee of the bell States telephone laboratories in new Jersey (USA) D. Hagelbarger created in the early 50-ies of the cybernetic device to play the so-called “coin”.
(The end. Beginning in № 12, 1974)
Zaim standard of six acres, for several years in a row are unique, by definition of neighbors of a vehicle are both upgraded sled, and manual single axle truck. He was convinced at the lowest cost here, indeed, benefit.
Developed industry of South Africa helped to create the country’s advanced military industry, ranking in the global top ten by volume of its products. Enterprises of the state Corporation ARMSCOR under the Ministry of defense, almost completely meet the requirements of your army, developing samples, capable of performing combat tasks, taking into account local climatic conditions.
Paul A. Deryabkin, snowmobile enthusiast equipment Ivanova from the city, have created more than one snowmobile. His first design, snowmobile-amphibian (photo). successfully tested six years ago. The trail was designed and built trehmernye snowmobile, which also showed good driving performance. But they had a weak side: the lack of stability on sharp turns and when driving on rough terrain. And now created a third option: chetyrehlistnyj snowmobile (figure), which, according to P. A. Deryabkin, was the best.
Of course, thyristor power switches in household appliances is very compact and convenient, but… КУ201, КУ202 and familiar to all cheap copies, unfortunately, tend unjustly to fail. Failsafe only thyristors for industrial use (TL), but they are quite expensive and overall. Besides working, for example, an electric heater thyristor (triac-like) inclusion creates in radios and tape recorders unpleasant 100-Hertz background. So sometimes you have to go back to the old, but tried and tested method on a powerful load through the contacts of electromagnetic relays.