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In the demonstrating plant installed and operated by him at Menlo Park in 1880 ten dynamos of eight horse-power each were driven by a slow-speed engine through a complicated system of counter-shafting, and, to quote from Mr.
Under normal conditions it is not necessary to create a high vacuum to suck the gas into the cylinder, but it is as well to understand what results we would tend to produce, did we work on these lines. Of course, with small high-speed engines fitted with suction air valve, the vacuum is higher than it would be in slow-speed engines with mechanically operated valves.
"Anything that you would gain by having a slow-speed motor and smaller propeller blades, would be lost by the ponderous air-condensing machinery you would need," Tom told Mr. Damon. "Besides, if you could surround your propellers with a strata of condensed air, it would create such terrible cold as to freeze the propeller blades and make them as brittle as glass.
And he was well aweary. A little tug had laid hold of the Tryapsic, and with clang and clatter and shouted command, with engines half-ahead, slow-speed, or half-astern, the battered old sea-tramp was nudged and nosed and shouldered through the dock-gates into Ring's End Basin. Lines were flung ashore, fore and aft, and a 'midship spring got out.
Did you ever try to lie all morning with a slow-speed imagination? That's what we had to do.
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