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Loss in capacity of air compressors by clearance is in direct proportion to the pressure. Owing to the loss of capacity by clearance space at high pressures, it is important that compound air cylinders should be used for furnishing air at high pressure.
The air was too rarefied to permit breathing outside, though my little air compressors were automatically maintaining the proper density within the shell. If I could compress a sufficiently large quantity of air inside the craft, I would add to its weight. But there seemed little chance that I would myself be able to withstand sufficient compression.
The boys followed him below to watch the work. Messrs. Farnum and Pollard, too, were soon below, for they wanted to observe the work of the air compressors and the dynamos. The work had to be started by lantern light, but, within ten minutes, it was possible to turn on electric lights below.
In ordinary practice air compressors deliver the air at less than 100 pounds pressure, so that with a properly designed air cylinder the clearance space is so small that the capacity of the compressor is not materially affected.
There would be much talk of pistons, displacement of cylinders, stroke, reciprocating engines, steeple compound and triple-expansion engines, Scotch boilers, winches, compressors, dynamos, composition and iron propellers and the latest developments in crude-oil burners.
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