Bike pedals used to put a metal screw cap to protect the bearings from contamination. Now, instead, use the plastic plugs, which are often lost. Rescue plastic or nylon tubes from medical bubbles. Such substitutes being kept quite steady.
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ELECTRIC PLUS SPINDLE
Electrocaloric (Fig. 1) consists of a spindle with a bobbin and flyer, electric motor, transformer and switch. The metal shaft of the spindle (Fig. 2) a console fastened to the rack on...
FIGHTING FROM MURMANSK
This "bouzoukia" developed in the aeromodelling circle regional station of young technicians in the city of Murmansk. Speaking with her at the regional competitions, an eighth-grader...
