The need to sample a semicircular groove often occurs during the manufacture of home-made furniture or the construction of a garden shed. How to do it without the special tool! The figure shows the method of manufacturing such a groove with a conventional circular saw — a workpiece moving along the inclined installed a bar-rail. The tilt angle depends on the width of the groove and determined by the elementary measuring instrument of the type of a parallelogram and the line.
Recommend to read
AND NAIL — TOOL
Developed a lot of tools for punching large diameter holes in sheets of plywood; many of them are rather complicated or cumbersome. I need only a wooden plank to two nails. Hammer them...
I-17
In 1933, after the purchase by the Soviet Union license on 760 HP engine "Islamo-Suiza" 12ybrs. N. N Polikarpov again returned to the idea of creating a fighter with a liquid-cooled...
