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Special attention was given to the machining of the interiors of the cylinders and the combustion heads, with the result that the exceptionally high compression of 95 lbs. per square inch was obtained, giving a very flexible engine. The cylinder heads were completely water-jacketed, and copper water-jackets were also fitted round the cylinders.
Make the most of yourself, I say; and let the Devil go hang himself if he's a mind to it." Sally, who had never thought of such a thing, promised. For a time she was flattered by the vision of singing to audiences. But that soon faded. She met nobody outside Madame's, except for one or two young men who spoke to her on the way home; and so she kept to her sewing and machining for Miss Jubb.
To return to the case of the machinist who had been working for ten to twelve years in machining the same pieces over and over again, there was but a remote chance in any of the various kinds of work which this man did that he should hit upon the one best method of doing each piece of work out of the hundreds of possible methods which lay before him.
We have had to forge new tools for a new role of government operating in a democracy a role of new responsibility for new needs and increased responsibility for old needs, long neglected. Some of these tools had to be roughly shaped and still need some machining down. Many of those who fought bitterly against the forging of these new tools welcome their use today.
About one-half the amount paid for labor goes to the men who run the machine tools, and the other half is paid to workmen who do the other work, such as handwork, assembling, transporting, etc. Therefore, the cost of machining is either one-sixth or one-eighth of the total cost. On top of the net cost of the product there should be a profit.
At eight, when the wind was coming up, they would be heard in the workshop, adjusting and readjusting, machining down bearings, testing wing strength, humming and laughing and busy; a life of gasoline and hammers and straining attempts to get balance exactly right; a happy life of good fellows and the achievements of machinery and preparation for daring the upper air; a life of very ordinary mechanics and of sheer romance!
They are apt to think, for instance, that the problems connected with making the parts of an engine require the especial study, one may say almost the life study, of a set of engine-making mechanics, and that these problems are entirely different from those which would be met with in machining lathe or planer parts.
They had to use the cone bearings, but in order to protect the fine channellings for oil they'd have to use cone-shaped shims at the beginning while running at low speed. The cone ends of the shaft would need new machining to line them up. The bearings had to be fixed, yet flexible. The They had used many paper napkins the night before, merely envisioning these details.
A seven-cylinder model soon displaced this first engine, and this latter, with a total weight of 165 lbs., gave 61.5 horse-power. The cylinders were machined out of solid nickel chrome-steel ingots, and the machining was carried out so that the cylinder walls were under 1/6 of an inch in thickness.
Without going into technical details, let me say the making of the moulds and the cores, and the packing of the cores, are done with the work in motion on the platforms. The metal is poured at another point as the work moves, and by the time the mould in which the metal has been poured reaches the terminal, it is cool enough to start on its automatic way to cleaning, machining, and assembling.
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