| 摘要 |
A gunfire simulator has a combustion chamber 28, means 21, 31 for admitting fuel gas to the combustion chamber, inlet valve means 18,for admitting oxygen or an oxygen containing gas to the combustion chamber, ignition means 23 for igniting fuel gas in the combustion chamber, an exhaust port 9 in the combustion chamber and outlet valve means for closing the exhaust port and arranged to open rapidly in response to a pressure rise within the combustion chamber. Preferably the outlet valve means comprises a frangible diaphragm 15, which may be clamped by its marginal portion in a breach block during combustion. The diaphragm may be part of a web 14 of thin sheet material whereby a fresh portion of the material may be presented to close the exhaust port after each explosion. <IMAGE>
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