United States or Belgium ? Vote for the TOP Country of the Week !
The heavy beating sound was evidently just behind us, and ever and again a bright green vapour drove up like a veil across our peephole. The cylinder was already opened in the centre of the pit, and on the farther edge of the pit, amid the smashed and gravel-heaped shrubbery, one of the great fighting-machines, deserted by its occupant, stood stiff and tall against the evening sky.
"You can take and carry it or I'll take the cylinder out, if you are not convinced about me." "You'd better let me carry it," said Shorty, shoving the revolver in his own belt. "These are queer times, and one can't be too careful with rebels who claim to be Yankees, and Yankees who claim to be rebels." They trudged back to camp, taking turns riding the horse.
This relation is maintained in the following rule, which expresses the nominal horse power of high pressure engines: multiply the square of the diameter of the cylinder in inches by the cube root of the length of stroke in feet, and divide the product by 15.6.
According to this teaching, which the young student is expected to understand and to entirely believe, a pressure of steam of, say eighty to a hundred and twenty pounds to the inch on one side of the piston is accompanied by an absolute vacuum there, which permits the pressure of the outside air to exert itself against the opposite side of the piston through the open port at the other end of the cylinder.
These constitute a regenerator of heat, and also prevent a communication of flame from the cylinder to the receptacle. In the upper end of the cylinder or of the piston shield are provided electrodes which give an electric spark, or a platinum wire which is rendered incandescent by a current from an inductor or other source of electricity to ignite the combustible charge of the cylinder.
The Otto engine must be so familiar in appearance to all of you, that I need hardly trouble you with details of its external appearance. I shall briefly describe its action. Its strong points and its weak points are alike caused by its cycle. One cylinder and piston suffices to carry out its whole action.
The piston thus divides the capacity of the cylinder into two distinct and well-closed areas. When it has to descend, the steam from the caldron reaches freely the upper area through a tube conveniently placed, and pushes it from top to bottom as the atmosphere did in Newcomen's engine.
Why, when I wasn't big enough to make a hand with the herd, only ten years old, in the days when we drove to Abilene, they used to send me in the lead with an old cylinder gun to shoot at the buffalo and scare them off the trail. And I've made the trip every year since.
"That's only a little priming, a little carrying-over, as they call it. It'll happen all night, on and off. I don't say it's nice, but it's the best we can do under the circumstances." "What difference can circumstances make? I'm here to do my work on clean, dry steam. Blow circumstances!" the cylinder roared. "The circumstances will attend to the blowing.
But," continued he, "there appears to be no reason why the cylinder should be made equally large along its whole length; and were I to repeat this experiment, I would make the middle part, round which the hawser was to be passed, of a single topmast, while I would swell out the ends of my cylinder or raft to three or four feet in diameter.
Word Of The Day