The Butterfly Bomb was a German 2-kilogram anti-personnel submunition used by the Luftwaffe during the Second World War. It was so named because the thin cylindrical metal outer shell which hinged ope
SD 2 – Closed: fuze is not yet armed.
SD 2 – Open: wings have flipped open and screw threads at the base of arming spindle are visible: fuze is now armed.
Photo of an SD 2 from Civil Defence Training Pamphlet No 2: Objects Dropped From The Air (3rd Edition).
AB 23 submunition dispenser.
In military munitions, a fuze is the part of the device that initiates its function. In some applications, such as torpedoes, a fuze may be identified by function as the exploder. The relative complex
Butterfly Bomb
…iron, which was slightly larger in diameter before its wings deployed. A steel cable 121 mm (4.8 in) long was attached via a spindle to an aluminium fuze screwed into the fuze pocket in the side of the bomblet. The outer shell was hinged and would flip open as two half-cylinders when it was dropped…
Wooden grenade fuse from the 17th Century, broken open vertically, with preserved delay charge.
Mk 53 Proximity fuze for an artillery shell, c. 1945
A modern multichannel radio remote detonator, in 2015.
The contact fuze of a G7a torpedo, a hybrid design using both impact and swing-arm inertial triggering.