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 18.
Σελίδα 184
... obliquity to that line and 8XP would have been negligible . Therefore , unless aiming points are quite close and have considerable obliquity , the correction for the fictitious gun need not be made as the parallax method is only ...
... obliquity to that line and 8XP would have been negligible . Therefore , unless aiming points are quite close and have considerable obliquity , the correction for the fictitious gun need not be made as the parallax method is only ...
Σελίδα 198
... obliquity of base to range . The front or slide face of the ruler has the azimuth and height of trajectory scales ; the reverse face the parallax table . ( See Figure 24. ) For measuring azimuths , the scale on either edge of the slide ...
... obliquity of base to range . The front or slide face of the ruler has the azimuth and height of trajectory scales ; the reverse face the parallax table . ( See Figure 24. ) For measuring azimuths , the scale on either edge of the slide ...
Σελίδα 201
... Obliquity . The parallax of a point the direction of which is normal to the front of the bat- tery , usually true of the target , is easily obtained , as we have seen , by dividing 20 by the number of thousands of yards in the range of ...
... Obliquity . The parallax of a point the direction of which is normal to the front of the bat- tery , usually true of the target , is easily obtained , as we have seen , by dividing 20 by the number of thousands of yards in the range of ...
Σελίδα 202
... obliquity of GG1 . NA is the normal to GG . N'N ' is the normal to GG1 . The angle O ' included between the normals measures the obliq- uity of A with re ... obliquity increaseş P with the angle of obliquity , for the larger 202 GUNNERY.
... obliquity of GG1 . NA is the normal to GG . N'N ' is the normal to GG1 . The angle O ' included between the normals measures the obliq- uity of A with re ... obliquity increaseş P with the angle of obliquity , for the larger 202 GUNNERY.
Σελίδα 203
... obliquity , for the larger the latter the smaller the arc in- tercepted by the visual angle , or the smaller the actual parallax . The value of P ' , or the actual paral- lax , may be deter- mined by trigono- metric solution as follows ...
... obliquity , for the larger the latter the smaller the arc in- tercepted by the visual angle , or the smaller the actual parallax . The value of P ' , or the actual paral- lax , may be deter- mined by trigono- metric solution as follows ...
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 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 sulphuric 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.