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Updated: June 11, 2025
It was a mere act of borrowing, and borrowing was never accounted a crime; borrowing not money even, only a name, and for so short a time. No harm; it could do no one in the world any harm. While these reasonings went on in his mind, his heart dropped down again into its right place; his pulse ceased to beat like the pistons of a steam-engine; he came gradually to himself. After all, what was it?
The inlet valves were of the automatic type, arranged on the tops of the cylinders, while the exhaust valves were also overhead, operated by rockers and push-rods. The pistons and piston rings were of the ordinary type, made of cast-iron, and the connecting rods were circular in form, with a hole drilled down the middle of each to reduce the weight.
How good it was to feel the steady thrust of the pistons, the long roll of the ship over the swell! And then, when Elsie brought him his breakfast, and stood by his side as he watched the set of the tide with unwavering eyes, what a joy that was, to listen to her story of the night's wanderings, and to know that, with God's help, their Odyssey was nearing its end!
Puffing and snorting, and with the pistons turning the high wheels, which could not get a hold on the slippery rails, at lightning speed, the engine started just as the Japanese soldiers ran into the station, from the windows of which they commenced to fire blindly at the departing train. The bullets poured into the rear cars like hail-stones, smashing the wooden walls and window-panes.
I have applied the same kind of piston to ordinary water-pumps, with similar excellent results. In most cases of right packed pistons we spend a shilling to save sixpence a not unfrequent result of "so-called" refined improvements. An instantaneous Mode of producing graceful Curves, suitable for designing Vases and other graceful objects in Pottery and Glass.
Hence, powerful strokes from its wings in the deeper water, or fearful tremors as it rose and ran wild, causing heavy thunderings beneath the stern, and furious gallopings of the pistons which the engineer could master but with difficulty. One observation Godfrey made, of which at first he could not discover the cause.
The combustible mixture, emanating from a common supply pipe, was led through conduits to the front ends of the cylinders, in which the charges were compressed before being transferred to the working spaces through ports in tubular extensions carried by the pistons.
Peeping presently from his engine-room the black saw the Lord Dynamo spin and whirl beside his little brothers, and the driving wheels were beating round, and the steam in the pistons went thud, thud, exactly as it had been earlier in the evening. After all, from the mechanical point of view, it had been a most insignificant incident the mere temporary deflection of a current.
"Why, I don't know as I'd want to commit myself in too offhand a way," replied Hal, slowly, as though thinking. "What appeared to be at the bottom of the trouble?" "Why, it may have been that one of the naval machinists, not understanding our engines any too well, allowed one of the pistons to get overheated, and then resorted to filing," Hal replied. "What?
Exhibited in the Paris Aero Exhibition of 1912, the Laviator two-stroke cycle engine, six-cylindered, could be operated either as a radial or as a rotary engine, all its pistons acting on a single crank. Cylinder dimensions of this engine were 3.94 inches bore by 5.12 inches stroke, and a power output of 50 horse-power was obtained when working at a rate of 1,200 revolutions per minute.
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