If the head of the screw to give with the help of nalilsya the form shown in the figure, then any attacker will not be able to turn. On such hardware it is recommended to set sensible things sailing and motor boats, hook locks.
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Judging by the pace, which is professional equipment in a recently available class gliders A1 soon and these "school" paritel can be divided into two distantly spaced from each other...
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Profile "CRD-2". Developed in 60-ies of the Western European model airplanes especially for rezinomotornaya models. This profile is also recommended for glider models of a class "A-1". ...
