Gunnery and Exposives for Field Artillery Officers1911 - 101 pages |
Common terms and phrases
3-inch field gun adjustment aiming point ammunition allowance angle of departure angle of fall angle of opening approximately assumed axis bracket burst interval bursting charge cent rectangle center of impact CHAPTER combustion common shrapnel conducting the fire cone of dispersion corrector deflection difference departure corresponding determined detonation direction distance Drill Regulations effective range equal feet per second Field Artillery Board fire for effect foot-seconds fuse setter fuse setting grains gravity ground section gun and target guncotton Gunnery height of burst hence high explosive high-explosive shrapnel increase interval of burst involving indirect laying mask matériel maximum ordinate meal powder mils muzzle velocity nitric acid nitrocellulose nitroglycerin normal observing station parallax percussion bursts personnel plane of fire point of burst practice projectile proper range table rapid right piece round seen shell fillers shot shrapnel balls shrapnel burst shrapnel fire smokeless powders telescopic sight trajectory in vacuo trigono
Popular passages
Page 69 - ... re-experiencing emotional relations which had their origin in his earliest objectattachments during the repressed period of his childhood. In this way the transference is changed from the strongest weapon of the resistance into the best instrument of the analytic treatment. Nevertheless, its handling remains the most difficult as well as the most important part of the technique of analysis.
Page 3 - Organized Militia of the United States. By order of the Secretary of War : WILLIAM CROZIER, Brigadier General, Chief of Ordnance.
Page 30 - When a high-school teacher demonstrates that the sum of the interior angles of a triangle equals 180°...
Page 79 - ... from concealed positions. The first characteristic facilitates intelligent direction. It enables a commander to hold a powerful force well in hand and to bring it to bear with the desired intensity at the proper place and time. The second characteristic enables artillery to bring a crushing fire to bear upon a vulnerable enemy before he can escape from its action. The third characteristic permits artillery great freedom of action, enabling it to interpose effectively over a broad terrain and...
Page 14 - Angle, w', is the angle made by the tangent to the trajectory with the horizontal at the point of fall. Initial Velocity is the velocity of the projectile at the muzzle. Remaining Velocity is the velocity of the projectile at any point of the trajectory. Drift, kf, is the departure of the projectile from the plane of fire, due to the resistance of the air and the rotation...
Page 84 - Generally speaking, explosion may be denned as a sudden and violent increase in the volume of a substance. Chemically, explosion is the rapid conversion of a solid or liquid to the gaseous state, or the instantaneous, or nearly instantaneous, combination of two or more gases accompanied by increase of volume. Certain compounds contain a considerable quantity of oxygen, with which they are very ready to part when heated, and if, therefore, one of these materials be intimately mixed with a readily...
Page 63 - The flatter the trajectory the greater the depth of effect. A study of the ground section of cones of dispersion should be made in connection with the effective ranges of shrapnel balls. It will be found that many balls impacting near the outer limit of a ground section are ineffective due to lack of man-killing energy. CHAPTER IX. THE EFFECT OP A GROUP OF SHRAPNEL.
Page 86 - No marked improvement was made in gunpowder until 1S60, when General Rodman, of the Ordnance Department, US Army, discovered the principle of progressive combustion of powder, and that the rate of combustion, and consequently the pressure exerted in the gun, could be controlled by compressing the fine grained powder previously used into larger grains of greater density.
Page 91 - ... large to put a man or horse out of action. (e) Convenient in form and consistency for packing and loading and for making into charges of different weights. 16. Shell fillers. — In our service picric acid, explosive "D," and tri-nitro-toluol are used as shell fillers.
Page 14 - Sight, abf, is the straight line passing through the sights and the point aimed at. The Line of Departure, be, is the prolongation of the axis of the bore at the instant the projectile leaves the gun. The Plane of Fire, or Plane of Departure, is the vertical plane through the line of departure. The Angle of Position, e, is the angle made by the line of sight with the horizontal.