Gunshot injuries : how they are inflicted : their complications and treatment . Fig. 13. to roll on the more dense air beneath it; suffice it to know that it isdue to air resistance. The drift of a gun is in the direction of its rifling,a right-handed twist causing a drift to the right, and vice versa. Figure 12 shows the drift curve, up to 2000 yards, of the presentcaliber .30 service rifle. AC is the path of deviation of the projectilefrom the vertical plane AB. BALLISTICS II. THE TRAJECTORY 29 The curve described by the center of gravity of a projectile duringits passage through the air is
Gunshot injuries : how they are inflicted : their complications and treatment . Fig. 13. to roll on the more dense air beneath it; suffice it to know that it isdue to air resistance. The drift of a gun is in the direction of its rifling,a right-handed twist causing a drift to the right, and vice versa. Figure 12 shows the drift curve, up to 2000 yards, of the presentcaliber .30 service rifle. AC is the path of deviation of the projectilefrom the vertical plane AB. BALLISTICS II. THE TRAJECTORY 29 The curve described by the center of gravity of a projectile duringits passage through the air is called the trajectory. In vacuo a trajec-tory would be a parabola, but the curve is greatly deformed from thatof a parabola by the air resistance. Fig. 13 shows the trajectories ofthe caliber .45 Springfield rifle, the Krag-Jorgensen rifle, and thepresent caliber .30 service rifle at a range of 1000 yards. (a) The Danger Space.—Fig. 14 shows the 1000-yard trajectory ofthe service rifle. The line DE is drawn horizontally a distance of 8. feet above the ground line OX, representing the height of a cavalryman,the line FG is drawn similarly 68 inches above the ground to representthe height of an infantryman. The points/, d, e, and g are projectionsof the intersections of these horizontal lines with the trajectory. Itwill be seen that a man on horseback will be in danger in the fields Ocl
Size: 3430px × 729px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksu, booksubjectgunshotwounds
