German Diehl manufactured 20x139mm DE-111 Anti-Personnel (APERS) Shrapnel round. DE stands for “Deutsches Erprobungsmodell,“ meaning “round under evaluation“. This round has a striker in the base, pushed forward in the firing cap upon firing. The firing cap ignites the delay element above the firing cap (delay is about 40ms). Above this delay charge is an ejection tube with an extension tube on top that, which is filled with a number of small tungsten balls. The lower extension tube has a chamber housing a powder charge, which launches both extension tubes and the load of tungsten balls forward upon ignition of the powder charge. All this is topped with an aluminum ballistic cap that will be pushed off over a weakened rim by the action of the previously mentioned parts. This aforementioned description is the normal functioning of a live DE-111 round. Our round shown in the video is 100% inert.
20x139mm ammunition is fired in the following autocannons: Hispano-Suiza HS-820 cannon, Oe
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