The Modern Rifle ...The Authors, 1917 - Ballistics |
From inside the book
Results 1-5 of 29
Page 20
... trajectory . Our problem , then , is the solution of the curve , ACF , Fig . 1 , considering all elements connected therewith . In vacuo the path of a projectile is a parabola , represented by the curve ACB , Fig . 1 , irrespective of ...
... trajectory . Our problem , then , is the solution of the curve , ACF , Fig . 1 , considering all elements connected therewith . In vacuo the path of a projectile is a parabola , represented by the curve ACB , Fig . 1 , irrespective of ...
Page 22
... Trajectory of a projectile is the curve , ACF , Fig . 1 , described by the center of gravity of the projectile in its motion through space ; AC is the ascending and CF the descending curve . The Range , A F , is the distance from the ...
... Trajectory of a projectile is the curve , ACF , Fig . 1 , described by the center of gravity of the projectile in its motion through space ; AC is the ascending and CF the descending curve . The Range , A F , is the distance from the ...
Page 23
... trajectory . Caliber is the internal diameter of the bore or the diameter of the bullet , and is expressed in deci- mals of an inch or in millimeters ( mm ) . .22 caliber equals 22-100 inch ; .303 equals 303-1000 inch , etc. 1 mm equals ...
... trajectory . Caliber is the internal diameter of the bore or the diameter of the bullet , and is expressed in deci- mals of an inch or in millimeters ( mm ) . .22 caliber equals 22-100 inch ; .303 equals 303-1000 inch , etc. 1 mm equals ...
Page 27
... trajectory H , and incidentally the horizontal distance x , from the muzzle to the summit of the trajectory for any range X , ( in feet ) . The following arrangement of data is suggested as being convenient . The name and figures within ...
... trajectory H , and incidentally the horizontal distance x , from the muzzle to the summit of the trajectory for any range X , ( in feet ) . The following arrangement of data is suggested as being convenient . The name and figures within ...
Page 35
... trajectory curves requires a little more labor . Given V ( 2700 ) C ( .389 ) Problem 7 . X ( 500 yds . or 1500 ft . ) , T ( .709 sec . ) To determine the value of the ordinate , y , height of trajectory , for the different values of the ...
... trajectory curves requires a little more labor . Given V ( 2700 ) C ( .389 ) Problem 7 . X ( 500 yds . or 1500 ft . ) , T ( .709 sec . ) To determine the value of the ordinate , y , height of trajectory , for the different values of the ...
Other editions - View all
Common terms and phrases
12 o'clock wind 25 yards accuracy altitude angle of departure approximately axis ballistic coefficient barometric pressure bore bullet calculated caliber cartridge center of impact CHAPTER chronograph computed conical correction curve danger zone deflection in inches degrees determine diameter difference disc distance elevation of sights energy flight free recoil gravity greater head height Hence horizontal range hundreds of yards hunter illustration inclined range increases Interior Ballistics jectile less line of sight maximum vertical range mile wind muzzle velocity National Rifle Association Newton o'clock wind equals ogival oloidal paraboloidal planet point blank range powder charge Problem projectile travels range in hundreds rear sight remaining velocity Remington resistance rifleman rotation sea level shooting shots sighted for 200 smokeless powders solid of revolution Springfield TABLE 1-(Continued target temperature tion trajectory Uranus vertical deviation vital zone windage
Popular passages
Page 18 - Newton generalized the law of attraction into a statement that every particle of matter in the universe attracts every other particle with a force which varies directly as the product of their masses and inversely as the square of the distance between them; and he thence deduced the law of attraction for spherical shells of constant density.
Page 171 - FRACTION is a negative number, and is one more than the number of ciphers between the decimal point and the first significant Jigure.
Page 173 - To extract the root of a number, divide the log of the number by the index of the root, and take the antilog of the quotient.
Page 120 - ... although the gun had lost its effectiveness after Group B was fired (when overheating started). After Group D was fired the barrels were allowed to cool. They were then fired and gave accurate results. The shot groups were as small as those made when the barrel was first used and there was no change in the distance of the center of impact from the center of the target.
Page 23 - Units of Work; the Foot-pound.— It is often necessary to represent work numerically; hence the necessity for a unit of measurement. The unit commonly in use, for the present, in England and this country is the foot-pound.
Page 111 - ... to the right of its course in the northern hemisphere, and to the left of its course in the southern hemisphere.
Page 173 - Log. 4,000, 3.612360; one-third of this is 1.204120, to which the corresponding number is 16, which is the root sought. 12. When the characteristic is negative, and not divisible by the index, add to it the smallest negative number that will make it divisible, and then prefix the same number, with a plus sign, to the mantissa. Example.
Page 17 - Isaac announced that an apple falls to the earth because every particle of matter in the universe has an attraction for every other particle. Think carefully what this means; it is a most astonishing statement. All bodies of matter pull other bodies of matter toward themselves. The earth attracts the apple and it falls; 1 One little girl when asked the meaning of this sentence replied, " The force tries to produce motion.
Page 24 - 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.
Page 125 - the panoramic sight is set at zero the vertical plane through the line of sight is parallel to the axis of the bore.