| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem in using a transportable supporting weapon such as an antitank rifle or an antitank missile in a building wherein damage is inflicted upon a weapon operator, accompanied by toxic gas in addition to hydrochloric acid, lead powder, and heavy metal, and it is very dangerous. SOLUTION: The present invention relates to a method and a device by means of which it has been made possible, without gas discharge to the surrounding environment, to accelerate the speed of a powder-gas-driven projectile 4 from zero to a speed which gives the projectile free-flying characteristics. This has been made possible by utilizing at least some of the expansion force from the propellent powder charge 11, which discharges gas when it is initiated, for, by means of a displaceable piston 7, driving a countermass 8 out of the rear part 13 of the projectile in the direction opposite to the desired flying direction of the projectile 4. COPYRIGHT: (C)2005,JPO&NCIPI
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