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Updated: June 11, 2025
Their legs would drive out like pistons, and they soared up and through the air. "They were tired while they made those examinations, and slept heavily at night. "Then one night there was a conference. We saw then what they intended. Before we had tried desperately to signal them. Now we were glad that we had failed.
Apart from the metallic construction of aeroplanes an enormous amount of work was done in the testing of different steels and light alloys for use in engines, and by the end of the War period a number of aircraft engines were in use of which the pistons and other parts were of such alloys; the chief difficulty having been not so much in the design as in the successful heat-treatment and casting of the metal.
With this engine, each crank pin has two connecting rods bearing on it, these being placed side by side and connected to the pistons of opposite cylinders and the two cylinders of the pair are staggered by an amount equal to the width of the connecting rod bearing, to afford accommodation for the rods.
A. The variety of pistons employed in locomotives is very great, and sometimes even the more complicated kinds are found to work very satisfactorily; but, in general, those pistons which consist of a single ring and tongue piece, or of two single rings set one above the other, so as to break joint, are preferable to those which consist of many pieces.
When I turn this little valve an outlet is opened for the air to escape by a tube into branches communicating with each of these four cylinders. This works the tiny pistons, much the same as gas in a gasoline-motor, and they turn the little crank-shaft to which they are connected, and the crank-shaft in turn revolves the propeller on its end." "Wonderfully simple!" Mr. Giddings exclaimed.
The machinery which propels the ship consists of two engines, each of 500 horse-power, the engines of the old line being also two in number, but only about 400 horse-power each Such cylinders, and shafts, and pistons, and beams are, I believe unrivaled in the world. There are four boilers, each heated by eight furnaces, in two rows of four each.
He turned on the greatest possible draught, the air roared across the furnace, the pressure goes up, up, amid the heaving of the motion, the bellowings of the boiler, the beating of the pistons. We are going a hundred kilometres an hour. "Get back!" shouts Kinko above the roar. "Get back into the van." "And you, Kinko?" "Get back, I tell you."
"He's one of the pistons of the big engine called 'Commerce," said poor Butscha, whose clever mind made itself felt occasionally by such little sayings timidly jerked out.
That night the two men and their black shadows were alone in the shed together. The shed was lit with one big arc light that winked and flickered purple. The shadows lay black behind the dynamos, the ball governors of the engines whirled from light to darkness, and their pistons beat loud and steady. The world outside seen through the open end of the shed seemed incredibly dim and remote.
In the middle of all this business, the two ladies and Alick, the eldest of the children, had started Gentle Annie for home, straight down the centre of the course. The big mare, hearing the yelling, and recognising that she was once more on a race-track, suddenly caught hold of the bit, and came sweeping up the straight full-stretch, her great legs flying to and fro like pistons.
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