Rifled ordnance, a treatise on the application of the principle of the rifle to guns and mortars, by Dunamikos. By L. Thomas1859 |
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
accuracy acquired advantage angle angular velocity Armstrong gun attainable axis ball ballistic pendulum bore breech breech-loading bullet burning powder calibre cast iron cause centre of gravity chamber charge of powder circumstances comparative considerably constructed Count Rumford deflection diameter diminished direction distance effect produced elastic fluid elevation elongated employed exerted expand experiments explosion fact fired gunpowder fore friction given greater grooves gunnery howitzer ignition impulse inches increasing spiral initial action initial force initial velocity iron projectiles iron shells jectiles large guns long projectiles long shot manner metal mortar motion musket nearly obtained ordinary ordnance placed Plate practical pressure principle projection proportion proportionate range ratio remarkable resistance rifled cannon rifled gun Rifled Musket Robins rotary velocity round shot Shoeburyness shot of different smaller solid shot spherical sufficient supposed surface terminal velocity theory throw tion trajectory velocity of rotation weight whole windage wrought iron
Δημοφιλή αποσπάσματα
Σελίδα 5 - close this paper with predicting, that whatever nation shall thoroughly comprehend the nature and advantages of rifled-barreled pieces, and, having facilitated and completed their construction, shall introduce into their armies their general use, with a dexterity in the management of them, they will by this means acquire a superiority, which will almost equal anything that has been done at any time, by the particular excellence of any kind of arms ; and will perhaps fall but little short of the...
Σελίδα 232 - Elevation of temperature does not alter the rapidity, but increases the length of their vibrations, and in consequence produces " expansion " of the body. All gases and vapors are assumed to consist of numerous small atoms, moving or vibrating in all directions with great rapidity; but the average velocity of these vibrations can be estimated when the pressure and weight of any given volume of gas is known, pressure being, as explained by Joule, the impact of those numerous small atoms striking in...
Σελίδα viii - The elongated shot, if properly formed and having a sufficient rotation, retains the same inclination to the horizontal plane throughout its flight, and consequently acquires a continually increasing obliquity to the curve of its flight. Now the effect of this obliquity is, that the projectile is in a measure sustained upon the air, just as a kite is supported by the current of air meeting the inclined surface, and the result is that its descent is retarded so that it has time to reach to a greater...
Σελίδα vii - In a vacuum the trajectory would be the same whether the projectile were elongated or spherical, so long as the angle of elevation and the initial velocity were constant ; but the presence of a resisting atmosphere makes this remarkable difference, that while it greatly shortens the range of the round shot it actually prolongs that of the elongated projectile, provided the angle of elevation do not exceed a certain limit, which in my experiments I have found to be about 6°. This appears at first...
Σελίδα 201 - From hence it appears that, whether the piece be loaded with a greater or less weight of bullet, the action of the powder is nearly the same, since all mathematicians know that, if bodies containing different quantities of matter are successively impelled through the same space by the same power, acting with a determined force at each point of that space, then the velocities given to those different bodies will be reciprocally on the subduplicate ratio of their quantities of matter.
Σελίδα 232 - ... gas is known, pressure being, as explained by Joule, the impact of those numerous small atoms striking in all directions, and against the sides of the vessel containing the gas. The greater the number of these atoms, or the greater their aggregate weight, in a given space, and the higher the velocity, the greater is the pressure. A double weight of a perfect gas, when confined in the same space, and vibrating with the same velocity — that is, having the same temperature...
Σελίδα 218 - ... made to whirl round an axis, which is coincident with the line of its flight. And hence it follows, that the resistance on the foremost surface of the bullet is equally distributed round the pole of its circular motion, and acts with an equal effort on every side of the line of direction, so that this resistance can produce no deviation from that line.
Σελίδα 218 - ... on every side of the line of direction, so that this resistance can produce no deviation from that line. And (which is still of more importance) if, by the casual irregularity of the foremost surface of the bullet, or by any other accident, the resistance should be stronger on one side of the pole of...
Σελίδα 201 - ... bullets instead of one) a greater quantity of powder would necessarily be fired, since a heavier weight would be a longer time in passing through the barrel. Whence it should follow, that two or three bullets would be impelled by a much greater force than one only. But the contrary to this...
Σελίδα 81 - And in the same ratio is radius to the sine of the angle of the inclination of the side of the cone, to its path or axis. So that, in this instance, the resistance is directly as the sine of the angle of incidence, the transverse section being the same, instead of the square of the sine.