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K pattern flamethrower
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K pattern flamethrower : ウィキペディア英語版
K pattern flamethrower

The K pattern (Polish: ''wzór K'') was a man-portable backpack flamethrower, produced in occupied Poland during World War II for the underground Home Army. These flamethrowers were used in the Warsaw Uprising in 1944.
==Construction==
Design work upon a simple flamethrower for the Polish underground, suitable for production in ordinary workshops, of readily available materials, started in 1942 on request of the Home Army main headquarters. Its main purpose was to be used against armoured vehicles. There were several designs produced, of which the most popular was the K pattern, becoming a sort of standard weapon of the Polish underground.〔Skotnicki, M. ''Miotacz ognia wzór "K"''〕 The exact number produced is difficult to estimate, but it was many hundreds (in one workshop of Antoni Więckowski in Warsaw alone, there were about 400 produced〔). Its production was concentrated in Warsaw. Due to production conditions, many flamethrowers differed in details.
The main parts of the flamethrower were two steel cylindrical tanks connected with each other, one for fuel (15 l capacity total, height 45 cm, diameter 16 cm) and a compressed air bottle (6 l, height 60 cm, diameter 12 cm).〔 This tank assembly was fitted with straps to permit it to be carried on the operator's back. Fuel was a mixture of diesel fuel (75%) and gasoline (25%). There was a valve between the fuel and air tanks. A rubber fuel hose connected the assembly with a fuel gun, which was a pipe 114-cm long, fitted with a valve at the muzzle, operated with a handle.〔
After opening a fuel gun valve, the fuel was propelled with compressed air and ignited by a simple mesh basket wrapped with a flaming rope, at the muzzle of the fuel gun (the rope had to be ignited before the weapon could be used). Normal way of operation were short 1-second bursts - about 30 could be fired.〔 The mesh basket with the rope was extinguished with a tin can.
The K-pattern flamethrower appeared a successful weapon, considering its primitive design and conditions of manufacturing. Its main flaw was that the air pressure decreased during operation so that successive bursts had a progressively shorter range. The weapon could be refueled by fuel carriers and the compressed air bottle replaced with a new one, in a procedure that took about 4 minutes.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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