Gunnery: An Elementary Treatise, Including a Graphical Exposition of Field Artillery FireB. F. Johnson Publishing Company, 1912 - 291 σελίδες |
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Σελίδα 65
... normal conditions merely explode , the combustible and oxidizer are mixed mechanically . Thus , in gunpowder the charcoal , sulphur , and niter are separately pulverized , and then mixed as thoroughly as possible by proper machines ...
... normal conditions merely explode , the combustible and oxidizer are mixed mechanically . Thus , in gunpowder the charcoal , sulphur , and niter are separately pulverized , and then mixed as thoroughly as possible by proper machines ...
Σελίδα 66
... normal action of these two classes of explosives.1 However , under certain conditions , their relative actions may be reversed , while explosives of both classes , if ignited in small quantities and unconfined generally , burn away ...
... normal action of these two classes of explosives.1 However , under certain conditions , their relative actions may be reversed , while explosives of both classes , if ignited in small quantities and unconfined generally , burn away ...
Σελίδα 67
... normal conditions explosive mixtures explode , while explosive compounds detonate . 6. The more usual methods of causing explosion are igni- tion , inflammation , percussion , friction and detonation . CHAPTER II EXPLOSIVE MIXTURES ...
... normal conditions explosive mixtures explode , while explosive compounds detonate . 6. The more usual methods of causing explosion are igni- tion , inflammation , percussion , friction and detonation . CHAPTER II EXPLOSIVE MIXTURES ...
Σελίδα 93
... normal condition . Unlike the dynamites previously mentioned , explosive gelatine is much more sensitive to shock when frozen than when in the unfrozen state , and is readily exploded by the impact of bullets . When unfrozen , it is ...
... normal condition . Unlike the dynamites previously mentioned , explosive gelatine is much more sensitive to shock when frozen than when in the unfrozen state , and is readily exploded by the impact of bullets . When unfrozen , it is ...
Σελίδα 135
... normal pressure . II . Part of the spin is expended in giving the lateral drift to the shell . Suppose a shell drifts two degrees at 4,000 yards , it will have moved 400 feet laterally in 10 seconds , its mean lateral velocity will be ...
... normal pressure . II . Part of the spin is expended in giving the lateral drift to the shell . Suppose a shell drifts two degrees at 4,000 yards , it will have moved 400 feet laterally in 10 seconds , its mean lateral velocity will be ...
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.