Gunnery: An Elementary Treatise, Including a Graphical Exposition of Field Artillery FireB. F. Johnson Publishing Company, 1912 - 291 σελίδες |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 26.
Σελίδα 172
... parallax minimized . But it is not desirable to take inconspicuous aiming points or those at distances so great as not to be readily determinable . Usually points not less than 2,000 and not more than 6,000 yards distant will 172 GUNNERY.
... parallax minimized . But it is not desirable to take inconspicuous aiming points or those at distances so great as not to be readily determinable . Usually points not less than 2,000 and not more than 6,000 yards distant will 172 GUNNERY.
Σελίδα 175
... parallax method prescribed in the Drill Regulations . The easiest way to grasp the parallax method is first to D- -E FIG . 4 . understand the meaning of the work parallax . This word is derived from the Greek word parallaxis , from para ...
... parallax method prescribed in the Drill Regulations . The easiest way to grasp the parallax method is first to D- -E FIG . 4 . understand the meaning of the work parallax . This word is derived from the Greek word parallaxis , from para ...
Σελίδα 176
... parallax of T is 7. In other words , to determine the parallax of any angle divide 20 yds . by 1 / 1,000 of the range ; thus : T = 20/363 = 7 P20 / 210 But in Figure 6 the base is 100 yds . and angles at P and T are five times larger ...
... parallax of T is 7. In other words , to determine the parallax of any angle divide 20 yds . by 1 / 1,000 of the range ; thus : T = 20/363 = 7 P20 / 210 But in Figure 6 the base is 100 yds . and angles at P and T are five times larger ...
Σελίδα 182
... difference is equal to the parallax of the target . ( Figure 10. ) The desired direction for G2 is G2T which is parallel to GIT1 and angle T1 or the necessary deflection for the line of 1 fire for G2 is equal to the angle T or 182 GUNNERY.
... difference is equal to the parallax of the target . ( Figure 10. ) The desired direction for G2 is G2T which is parallel to GIT1 and angle T1 or the necessary deflection for the line of 1 fire for G2 is equal to the angle T or 182 GUNNERY.
Σελίδα 183
... parallax of the target . Therefore , for parallel fire- DD = P . Referring to Figure 11 , it will be seen that with shrapnel fire a part of the effect of the right gun would be lost if G1 were directed straight at T1 and also that the ...
... parallax of the target . Therefore , for parallel fire- DD = P . Referring to Figure 11 , it will be seen that with shrapnel fire a part of the effect of the right gun would be lost if G1 were directed straight at T1 and also that the ...
Άλλες εκδόσεις - Προβολή όλων
Gunnery: An Elementary Treatise; Including a Graphical Exposition of Field ... Jennings Cropper Wise Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
Gunnery: An Elementary Treatise; Including a Graphical Exposition of Field ... Jennings Cropper Wise Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
Συχνά εμφανιζόμενοι όροι και φράσεις
acid adjustment aiming point altitude ammunition angle of obliquity angle of site azimuth B. C. telescope ballistics base battery commander bracket burst on graze bursts in air called combustion correct corrector crest curve decimal defilade deflection denominator determined detonation diameter direction distance dynamite elevation employed enemy equal error explosive extends the arm feet per second field artillery field guns Figure fraction front frustum fuse G₁ glycerin grains ground guncotton gunner gunpowder heat height of burst horizontal howitzer ignition increase indirect fire infantry line of fire line of guns mask measured method military minuend muzzle nitroglycerin normal object observing station obtained parallax position powder practice pressure prism projectile quantity range rear reduced result right gun right piece RULE.-Multiply saltpeter salvo sheaf shell short shot shrapnel sight slant height smoke smokeless powders square substances subtract surface target tion trajectory triangle velocity visible volleys whole number yards
Δημοφιλή αποσπάσματα
Σελίδα 42 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Σελίδα 39 - A circle is a plane figure bounded by a curved line, every point of which is equally distant from a point within called the center.
Σελίδα 7 - An improper fraction is one whose numerator is equal to or greater than its denominator as...
Σελίδα 14 - Place the numbers to be added so that the decimal points will be directly under each other. Add as in whole numbers, and place the decimal point in the sum directly under the decimal points above.
Σελίδα 7 - To reduce a mixed number to an improper fraction, — RULE : Multiply the whole number by the denominator of the fraction, to the product add the numerator, and write the result over the denominator.
Σελίδα 32 - ... and to the remainder bring down the next period for a dividend. 3. Place the double of the root already found, on the left hand of the dividend for a divisor. 4. Seek how often the divisor is contained...
Σελίδα 32 - Multiply the divisor, thus augmented, by the last figure of the root, and subtract the product from the dividend, and to the remainder bring down the next period for a new dividend.
Σελίδα 211 - ... estimates are usually too small and cause delay through an effort to correct the fire by making timid and insufficient changes in the range. Attention should rather be concentrated on deciding, from careful observation of each shot, upon the sense of a number of shots fired with the same range and site, and on quickly inclosing the target with fire which is surely short and fire which is surely over. By narrowing the bracket thus determined effective adjustment may be secured.
Σελίδα 212 - If the target is indistinct and of about the same color as the smoke, it may be less visible against the smoke as a background. A burst beyond the target may, for this reason, sometimes seem to obscure the target, and hence be judged short, when it is in reality over. On the other hand, some targets become very much more visible if projected against a smoke background.
Σελίδα 32 - TRUE DIVISOR. Multiply the true divisor by the last root figure, subtract the product from the dividend, and to the remainder annex the next period for a dividend.