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What that comes down to is, "This is specialized professional office equipment, it is priced for what architectural offices are willing to pay for necessary infrastructure." Keep in mind that a small to medium sized office would typically only have one or two such blueprint printers/plotters for...

The mechanical differences between the 1861 original Gatling and all later models of the Army hand cranked variety were extremely minimal, so the factual point remains that antique Gatlings were used as successful test rigs. It is also completely inaccurate to say that 3000 RPM is "almost...

Dude, that’s literally how they did proof of concept for Project Vulcan. They took a pair of vintage Army Gatling guns out of storage, hooked up an electric motor, and tested operating it at extreme ROF. The outcome was that it worked perfectly at up to about 3000 RPM, at which point the...

On the contrary, you would absolutely expect every professional baseball team in 1920 to be all-white, because professional baseball was strictly for whites only until the late 1940s.