SAILBOAT UNDER… UMBRELLA

SAILING UNDER THE... UMBRELLA

I think that the idea of using the umbrella as a sail come to mind to anyone who has solved it in a strong wind. However, the first whose attempt to use the umbrella instead of sail was in due time recorded in the journal “modelist-Konstruktor”, was Georgy Arbuzov, one of the pioneers of Windsurfing in the country and Chairman of the section of Windsurfing at the FPS of the USSR.

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A SKEWER FOR… WALLPAPER

Most of those who have decided to paste over the wall Wallpaper flat on their own, most often the whole day “bow” to each ordinary cloth, usually as a pack of cut of the Wallpaper have for spreading their glue directly on the floor, for lack of a suitable length of the table.
However, the Polish magazine “zrobi Sam” suggests that such work can be performed on an ordinary table, and it is important! – even alone: you simply have to modify the technology and use simple homemade device that provides besides the possibility to do without tiring bows -to prepare panels of standing.

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SIZE ADAPTER “CROWN”

SIZE ADAPTER

When you turn on the power source smoothing capacitor C1 is gradually charged via the resistor R4, serves to protect the diode bridge VD1 overload. There is a voltage at the output of the trigger divider. Due to the fact that it affects the resonant circuit, consisting of transformer T1 and capacitor C2 in the secondary winding II is induced EMF from the pulse, the power of which is sufficient to switch the transistor VT1 is in the saturation state, although the initial moment of time the current through this semiconductor triode is not due to the self-inductance of T1. Then starts to do the “addition” from the winding II, holding VT1 is in the fully open position.

AS FOR THE VILLAGE WITHOUT A TRACTOR?

AS A VILLAGE WITHOUT A TRACTOR?

For many years Hobbies of technical creativity as the main source of materials and machinery for me was a different sort of scrap yard. Out in my shed “migrated” all that seemed valuable to me, and was waiting for their application to varying design. Unclaimed gradually accumulated, and eventually the question arose: what to do with it? Would not go. Here and decided to maximize all these different glands in your new tractor. Design “Angara” started with a sketch drawing of the design. Then, after the detailed execution of working drawings, started construction. The result was, in my opinion, quite aesthetically pleasing, technologically advanced and reliable machine, with a reserve for possible future upgrades.

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