External ballistics

Factories, giving the characteristic of their patrons, usually indicate no initial velocity, and is obtained by measuring average speed and carry it to the middle distance. So, in the characteristic is specified speed 5, 10 and 12.5 m. Blum and Shishkin give an interesting table for converting speed of 10 m from the muzzle to the initial rate.The projectile is shot while driving on the bore, as shown by X-ray, compacted and shortened by 10-12%. In addition, each pellet, except for the head of a number of pellets, pressed into the gap (groove) between the two or three overlying spent grain and tends Read more [...]
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Fraction vlet

Fraction, taking off from the trunk, scattered in both the longitudinal and radial directionsLongitudinal section shot sheaf (scheme) Photo: Anton Zhuravkov Let's try to figure out the effect of prolixity sheaf shot on shooting at moving targets. We introduce the concepts «scree shot» and «shot sheaf».Shooting a fixed target does not pose much difficulty for the shooter. The aim is struck, if the sharpness and density of debris fraction sufficient. The same thing happens with the shooting of hijacking target, if not linger with a shot. In both cases, the Read more [...]
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REED ROOFS Methods of LAYING the ROOF Grass

Introduction as roofing materials stems and leaves of plants is one of the most of downesi traditions, at the current time received a chance for a real revival. A prerequisite for that is a boom in natural, ecologically clean materials affecting this very limited branch as construction in General and roofing work. Exotic palm leaves, of course, in our latitudes is hardly applicable, but plain and undemanding reed, faithfully collected, dried and prepared for operation, fully able to compete with the popular roofing materials in its hydro - and sound insulation properties, strength and durability, Read more [...]
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