1. FUZE FOR A GYRATORY PROJECTILE HAVING A BURSTING CHARGE, SAID FUZE COMPRISING A BODY AND WITHIN THE BODY: A PYROTECHNIC CHAIN FOR IGNITING THE BURSTING CHARGE OF THE PROJECTILE AND INCLUDING A DETONATOR PRIMER, A WALL DEFINING A FLUIDTIGHT COMPARTMENT WITHIN THE BODY, A DETONATOR CARRIER DISPOSED IN THE COMPARTMENT AND CARRYING THE DETONATOR PRIMER AND MOVABLE IN THE COMPARTMENT BETWEEN AN OPERATIVE POSITION IN WHICH THE DETONATOR PRIMER OF THE PYROTECHNIC CHAIN COMMUNICATES WITH SO AS TO BE CAPABLE OF IGNITING THE REST OF THE PYROTECHNIC CHAIN AND A RETRACTED POSITION IN WHICH THE DETONATOR PRIMER DOES NOT COMMUNICATE WITH THE REST OF THE PYROTECHNIC CHAIN, YIELDABLE RETAINING MEANS IN ENGAGEMENT WITH THE DETONATOR CARRIER TO YIELDINGLY RETAIN THE DETONATOR CARRIER IN SAID RETRACTED POSITION WHEN THE PROJECTILE IS NOT GYRATING, THE DETONATOR CARRIER AND RETAINING MEANS BEING SO ADAPTED AND ARRANGED THAT THE EFFECT THEREON OF THE GYRATION OF THE PROJECTILE IS TO MOVE THE DETONATOR CARRIER FROM SAID RETRACTED POSITION IN OPPOSITION TO THE ACTION OF THE RETAINING MEANS TO SAID OPERATIVE POSITION, AND THE DETONATOR CARRIER DIVIDING THE COMPARTMENT INTO TWO CHAMBERS, SMALL-SECTION PASSAGEWAYS PROVIDED BETWEEN THE DETONATOR CARRIER AND SAID WALL DEFINING THE COMPARTMENT AND PUTTING THE CHAMBERS IN COMMUNICATION WITH EACH OTHER, AND A MOTION DAMPING LIQUID FILLING THE CHAMBERS AND PASSAGEWAYS WHEREBY THE MOVEMENT OF THE DETONATOR CARRIER FROM THE RETRACTED POSITION TO THE OPERATIVE POSITION IS RETARDED BY THE ACTION OF THE LIQUID WHICH IS CONSTRAINED TO FLOW FROM ONE CHAMBER TO THE OTHER BY WAY OF SAID PASSAGEWAYS.