In the XX century, the domestic large artillery and special power increasingly slipping into the category of secondary weapons. Although by August 1914 she was ahead of the world in the number field 76-mm guns, for the first time since Ivan III did not have heavy artillery. Nicholas II and his surrounding generals Kuropatkin and Sukhomlinov, and also in charge of the artillery of Grand Duke Sergei Mikhailovich religiously adhere to the French concept, claiming that the war could be won with only one 76-mm guns.
Cabins cabins are designed in order to provide effective and comfortable work of the personnel on the construction site. These are temporary buildings that together quickly and easily-to understand and serve as guard posts, living quarters, dining room or warehouse. For the manufacture of huts are made of various materials – wood, plastic, metal.
Bomber XB-70 VALKYRIE. The first jet bomber the BOEING b-47 came to the command of the U.S. air force in late 1951. However, the aircraft with maximum payload of about 10 tons could carry in their sections, not all types of bombs from the nuclear Arsenal of the United States at the time and thus became just a huge addition to the piston b-36. This circumstance was the cause of the development of the heavy bomber b-52, the first modification which was twice higher than the b-47 take-off weight in the range of about 5500 km, and, most importantly, could carry a hydrogen bomb MK.17 weighing 21 tons with a TNT equivalent of 20 megatons.
Modelers in different disciplines often have to deal with the problem of determining the speed of rotation of the parts, screws, shafts, and even cassette recorders. That’s what the device advises to use well-known Polish engineer, Janusz Wojciechowski.