Defense Issues

Military and general security

Archive for April, 2017

The map shows why the Russia fears the war with USA

Posted by Picard578 on April 26, 2017

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Why the British Army was so effective in 1914 – Learning lessons from Boer War

Posted by Picard578 on April 26, 2017

Posted in history | Tagged: , , | 3 Comments »

British songs

Posted by Picard578 on April 26, 2017

Posted in Uncategorized | 1 Comment »

Songs about veterans

Posted by Picard578 on April 26, 2017

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Modern artillery munitions

Posted by Picard578 on April 16, 2017

Introduction

Munitions are used for fulfilling the primary task of artillery, which is destruction or neutralization of enemy army, as well as enabling or supporting the ground maneuver by suppressing enemy defenses. First munitions were spherical stone projectiles, launched from ballistae and catapults. Identical projectiles were also used by first gunpowder artillery. Those were typically around 8 cm in diameter. French navy used basalt, which has higher density and hardness, to achieve increased hitting power; those projectiles could penetrate ship’s wooden sides at 200 meters. Stone projectiles were also used as incidendiary projectiles by coating them with lime, followed by resin. These were superseded by lead, which was easy to shape due to low melting point. In early 13th century (cca. 1221.), Chinese were using explosive ceramic projectiles, launched from catapult or a cannon. These were filled either with gunpowder, or a combination of gunpowder and metal shrapnel. In Europe, projectiles from bronze or iron were also used. These could be homogenous, or filled with gunpowder; earliest percussion fuzes – using flint to create the spark – appeared in 1650. Another type of shot was canister shot, which was used against combat for infantry at close range, and was particularly effective against linear formations of Middle and early New Ages. But when linear formations disappeared after American Civil War, canister shot was replaced by shrapnel, which utilizes time fuze and detonates in the air. During the 19th century, two main types of fuzes were used, time delay and impact fuzes. Time fuzes were combustion types, consisting of a burning fuse train, ignited upon firing. There were various designs, but all were only accurate to approximately the nearest 1/2 or 1/4 sec at best. Read the rest of this entry »

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(Ret.)Adm. Davor Domazet Lošo – by attacking Syria, US have sent a message to a power other than Russia

Posted by Picard578 on April 8, 2017

By attacking the air base in Syria with cruise missiles, US have basically started a war. Putin’s response to Trump, having warned that the move harmed US-Russian relations, is definetly a cause for concern.
What can be expected now? Is the next move on the US president? Is this a hasty move of mr. Trump or something like this could have been expected? Answers to these questions were given by (Ret.)Admiral Davor Domazet Lošo.

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Radar in counter-battery role

Posted by Picard578 on April 1, 2017

Artillery is dangerous because it is hard to find, hard to destroy, and has the ability to very quickly attack targets via indirect fire. Importance and difficulty of finding the enemy artillery was noticed early in World War I; French were the first to try to locate the enemy artillery, by locating the gun flash produced when firing. This was hard to do if the artillery was far away (reflections had to be used) and unreliable. This it was quickly replaced by sound detection techniques, which were also adapted by British and German militaries as well.

The basis of this technique is a row of 6-7 microphones in a 12 kilometre line. Since the sound spreads in the circles, microphones all detect the sound of a gun at different times, which allows calculating location of the origin of the sound. Original system was based on ordinary stopwatch and telephone cable or radio link, but it worked very well. Similar, but automated, system is in use today. Such system has major advantages in that it is low-cost and completely passive, making it very hard to find and destroy. However, it also has numerous disadvantages. Atmospheric state determination is crucial for its correct operation. The refractive index of air has to be found along the entire sound path, and wind affects system’s performance. Up until the appearance of GPS, setting up the system was also very difficult. Due to these and other issues, it is an inherently defensive technique, difficult to use in rapid movement (albeit it is possible to have two teams of “sounders” alternately set up the line ahead of each other). Read the rest of this entry »

Posted in weapons | Tagged: , , , | 12 Comments »