United States Army flamethrower with parts labelled]]A flamethrower is a mechanical device designed to project a long controllable stream of fire.Some flamethrowers project a stream of ignited flammable liquid; some project a long gas flame. Most military flamethrowers use liquids, but commercial flamethrowers tend to use high-pressure propane and natural gas, which is considered safer. They are used by the military and by people needing controlled burning capacity, such as in agriculture (e.g. sugar cane plantations) or other such land management tasks.
Flamethrowers date from the Byzantines, who used hand-pumped flamethrowers on board their naval ships (see Greek fire). Infantry flamethrowers were of limited range and capacity; the larger naval flamethrowers were used to set alight enemy ships' sails and rigging. The composition of the flammable chemical projected with these primitive flamethrowers is not definitively known.Modern flamethrowers were used firs