my grandpa used to talk about how, in the army during ww2, they ran out of fuel and got their vehicles to run on wood. i always wondered if this could possibly be true or if he was having 'creative' reminiscences...
Quoted: Construction of a Simplified Wood Gas Generator for Fueling Internal Combustion Engines in a Petroleum emergency
[tags: cars, history, technology]
we were musing about how silencers work.
Quoted: Most suppressors work by allowing the pressurized gases in the barrel to slowly expand before they exit the muzzle of the firearm, resulting in significantly less noise as the gases rush out slowly. The process is comparable to slowly opening a soda can and hearing a hissing sound rather than a "pop". Some suppressors are also structured like motorcycle mufflers for the sound waves to cancel as they reflect from the sides of the casing. Such suppressors are inherently more difficult to design and to manufacture since they require more precise cutting and assembly. For this reason, they are often bigger and are mounted on large-caliber rifles where the added sound suppression is needed most.
Quoted: Motion pictures have produced the common misconception that sound suppressors ("silencers") completely silence the weapon's sound, or reduce it to a quiet whistling sound, which is in most cases very far from the truth. In fact, the emergent noise can still be heard from a fairly great distance. The quiet whistling sound associated with silencers is more attributable to the noise made by air guns.
[tags: guns, wiki]
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