There are numerous ways to make current, to the ball of yarn did not run away and not out somewhere. The easiest is to put it in a box, basket, or, as shown in the drawing, just the right size jar.
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WITH THE ENGINE. BUT WITHOUT FUEL
Not so long ago in the journal "modelist-Konstruktor" was published material about model aircraft with pneumatic motor. The main advantage of this engine over any other is that the...
Funicular for a skier
For tourists and skiers in "large" mountains with complex terrain and significant elevation differences, chairlifts are usually installed. On their traction-carrying cable, they have...
