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Robert has just talked about three cylinders full of answers to the letters that's piled up while he's been gone, and as the girl goes out with the records he whirls around in the mahogany easy-chair and takes a good long look at me. "If it comes as hard as all that," says I, "I'll write out my resignation." "Mr. Piddie's been talking to you, I suppose?" says he.
It will be observed that with steam and air cylinders equal in diameter and stroke, an air pressure of 77 pounds is reached with a steam pressure of only 58 pounds. The reason for this is plainly shown in the cards, their areas being nearly equal. What is made up in the air card by high pressure is represented in the steam card by greater volume.
He then turned on the engine and made a terrable noise, to see if hitting on all cylinders. When he shut it off I told him about William spending a half hour in the Garage the day before. Although calm before he now became white with anger and said: "Just let me catch him sneaking around here, and I'll what's he after me for anyhow? I haven't got any Milatary Secrets."
The motor, one of three cylinders, was a self-starter, but by means of a crank and chain could be started from the steering platform, just aft of the trunk cabin, in case of emergency.
The curious reader can find more on the subject in other books; but as this is confined to personal experiences I will tell only what I have myself elicited. The youth's shaved head is allowed to grow its hair. He hangs around his brow a dangling string of bright-coloured bird skins stuffed out in the shape of little cylinders, so that at a short distance they look like curls.
Of these the largest had twenty cylinders, developing 200 brake horse-power it was virtually a double radial and the smallest was the original 30 horse-power three-cylinder design.
A one-hundred-horse-power motor weighed only two hundred and sixty pounds, and it was a splendid type for fast work. Briefly, the power generated by the explosions in the cylinders, operating against two centers of pressure, gave a rotary motion to the cylinders and crankcase, revolving around a stationary, hollow crankshaft.
From this point the paper travels alone, having become firm and strong enough to sustain its own weight; passing above the second press-rolls, it resumes its onward journey around the drying cylinders, passing over and under and over and under. The drying cylinders are hollow and heated by steam, their temperature being regulated according to requirements.
To keep a practically continuous forward movement on the driving-shaft, many motors are made with four cylinders, the piston of each being connected with the crank-shaft at a different angle, and each cylinder doing a different part of the work; for example, while No. 1 cylinder is doing the work from the force of the explosion, No. 2 is compressing, No. 3 is getting a fresh supply of gas, and No. 4 is cleaning out waste gas.
The cylinders are set desaxe with the crank shaft, and are of cast-iron, provided with radiating ribs for air-cooling; they are attached to the crank case by long bolts passing through bosses at the top of the cylinders, and connected to other bolts at right angles through the crank case. The tops of the cylinders are formed flat, and seats for the inlet and exhaust valves are formed on them.
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