This simple device facilitates the use of any tube, helping to squeeze it evenly and gently. It consists of a base in a hole which is inserted the tube, and turning a key with slit for exciting a planar end of the tube. The base and key are made of wooden bars of appropriate dimensions. Their interaction is clear from the figure.
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DRILL PIPE…
When I need to drill a hole in glass, I use this way. In the Chuck of the drilling machine is clamped copper tube length of 100 mm (the diameter is adjusted depending on what you need...
THE YAK-7
Scale model 1:33. YAK-7 and its modifications, the YAK-7, YAK-7A, YAK-7B. In March 1940 the Yakovlev design Bureau received an official assignment for the development of training...
