BCK has various meanings in the Aviation category. Discover the full forms, definitions, and usage contexts of BCK in Aviation.
The name given a pulley or sheave, or system of pulleys or sheaves mounted in a frame, and used to multiply power when moving objects by means of ropes run over the sheaves. Single, double or triple-when used with the word block indicate the number of sheaves it contains.
AviationBolwarra, Queensland,Australia
AviationTo back engines is to put them astern To back an oar is to reverse the action of rowing and propel the boat astern To back a sail is to haul its clew to windward To back anchor is to lay another anchor ahead of it, and with a cable or hawser extending tautly between them Wind is said to 'back' when it changes direction anti-clockwise
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