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FB 391
#WIP FUZES
Region
Italy
Category
Ammunition, Missiles and precision weapons
Armament 60, 81 and 120 mm HE mortar bombs. Development By Fuchs Electronics, South Africa , licensed to Borletti to meet requirements of Italian forces. Description This is a selectable proximity/point detonating fuze, with impact back-up in the event of proximity failure. A radio fuze, it functions on the reflected signal mixing with the transmitted signal to provide a low Doppler frequency. The particular signal processing technique used ensures proximity function with sharper altitude discrimination than that
obtained with an unmodulated carrier. Burst height is typically 3 m, almost independent of soil reflectivity, approach angles and terminal velocities. Arming requires setback and air flow through the turbogenerator and the electric detonator is short-circuited and out of line before firing. Two models exist; the FB 391A has the 1.5 in 12 tpi UNF thread and standard intrusion; the FB 391B has the French 35.7 × 200 metric thread and appropriate intrusion to be interchangeable with the V19P fuze. Manufacturer F B Borletti.