Some other non-US smoke grenades. The 4th photo shows a simulator vehicle launched smoke grenade alongside what just about has to be the longest smoke grenade made. The French Gr Fum F3 yellow smoke has a body that is 9 3/4 inches long. I don't have that many smoke variations. Smoke grenades can be functioned in several ways. They can be fuzed with a striker release fuze, a pull friction fuze or a friction striking fuze. Regardless of the ignition type smoke grenades have fuzes without detonators. Instead they are ignition types that spit a small flame into an ignition compound in the grenade. This compound burns, igniting the smoke mixture. The grenade body usually has one or more vent holes covered with pieces of tape. The tape is blown free by the pressure created by the burning smoke mixture allowing the smoke to exit the grenade. Some smoke mixtures, such as HC smoke, are toxic in high concentrations. White phosphorus grenades are usually intended to be incendiary grenades, but they have been used as smoke grenades because of the thick white smoke they produce.
