It’s hard to imagine New year without festive lights and a Christmas tree with a mysterious flickering lights. However elektrogirlyandy industrial manufacturing not everyone is like: get bored of the monotonous flashing, and is harmful, they say it’s for health. I propose to replace these “flashers” an improvised device, lights which Shine like candles — with smooth change of brightness. Among its advantages are the simplicity of an electric circuit, which will be able to collect anyone, and the lack of scarce or expensive electronic components.
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If you want to cut the pipe lengthwise into halves, it is necessary to outline its diametrical plane. It’s easy to do and without any measuring devices by using a sheet of paper. Attaching it to the end of the pipe and outlining a circle with a pencil, then cut out the circle and fold Read more…
(Model-a copy of the R-17). In October 1950, S. P. Korolev, the former at that time Chief designer of the Department of NII-88, involved in the ballistic long-range missiles, appealed to the government to develop a new missile to replace the obsolete P-1 was created, as you know, on the basis of the German V-2 (A-4). The proposal was supported, and in November 1951 a draft design was completed.The new missile was supposed to be more “simple and cheap to manufacture and easy to operate”. It was planned to use designed for anti-aircraft missiles V-300 liquid-propellant rocket engine operating on nitric acid and kerosene tractor with pressurization fuel supply system.
