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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WING — ON THE RISE
The peculiarity of the proposed model rocket class "Hawk" — the displacement of the wing at takeoff. As this increases the area of the tail section, shifting the center of pressure of...
THE INDICATOR FOR THE BATTERY
The safety device that signals the limit of the battery, must have for every modeller. The scheme of such a simple electronic device — figure 1. The unit is connected to the battery pack...
