Kleinflammenwerfer

The first German man-portable flamethrower was called the Kleinflammenwerfer (small flamethrower) or "Kleif". Fuel was stored in a large vertical, cylindrical backpack container. High-pressure propellant was stored in another, smaller container attached to the fuel tank. A long hose connected the fuel tank to a lance tube with an igniting device at the nozzle. The propellant forced the fuel through the hose and out of the nozzle at high speed when a valve was opened. The igniting device at the nozzle set fire to the fuel as it sprayed out. The flamethrower was operated by two soldiers, one carrying the fuel and propellant tanks, another wielding the lance. Wex, a replacement for the Kleif, was introduced in 1917.

It was replaced by the Grossflammenwerfer in WWI because it was unsuitable for Trench warfare.

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