M69 incendiary M69 incendiary The M69 incendiary bomblet was used in air raids on Japan and China during World War II. They were nicknamed "Tokyo calling cards". The M69 was a plain steel pipe with a hexagonal cross section in diameter and long. It weighed about . The bomblet used napalm (jelled gasoline) as an incendiary filler, improving on earlier designs which used thermite or magnesium fillers that burned more intensely, but were less energy- and weight-efficient, and were easier to extinguish. In Germany they were filled with jellied oil and dropped in clusters of 36 in the non-aerodynamic M19 bomb. Over
Incendiary ammunition surface layer, such that they explode inside the target. Additionally, targets with onboard electronics or computers can be damaged by metal fragments when they explode on the surface. Ignition is often delayed by varying means until after impact. Some explosive projectiles, such as high-explosive incendiary bullets, contain an incendiary charge intended to ignite explosives within the shell. Although not intended to start fires, tracer bullets can have a mild incendiary effect. This is particularly dangerous when they strike flammable substances or dry brush. Incendiary ammunition Incendiary ammunition is a type of firearm ammunition containing a compound that burns rapidly and