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Taketaba
A was a Japanese type of bulletproof shield made from bundled bamboo. Summary During the Sengoku period, were found unable to stop the bullets used by the recently introduced arquebus. The bullets used at the time were of very large caliber and thus had great destructive power, but their round shape and the lack of rifled barrels resulted in poor target penetration. Combined with the flexible strength of bamboo, this allowed ''taketaba'' to absorb and dissipate the energy of an arquebus shot. Because bamboo was in plentiful supply, ''taketaba'' were mass-produced and used throughout Japan. Kuki Yoshitaka's fleet, the , fastened large ''taketaba'' to the freeboard of their ships as a defense against cannon shot. Taketaba could also be laid on the ground in a row to create a duckboard over muddy or otherwise difficult terrain. See also *Palisade *Abatis An abatis, abattis, or abbattis is a field fortification consisting of an obstacle formed (in the modern era) of the bra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulletproof
Bulletproofing is the process of making an object capable of stopping a bullet or similar high velocity projectiles (e.g. shrapnel). The term bullet resistance is often preferred because few, if any, practical materials provide complete protection against all types of bullets, or multiple hits in the same location, or simply sufficient kinetic (movement) energy to overcome it. Origins In 1887, George E. Goodfellow, of Tombstone, Arizona, documented three cases where bullets had failed to penetrate silk articles of clothing. He described the shooting death of Charlie Storms by gambler Luke Short. Although Storms was shot in the heart, "not a drop of blood" exited the wound. Goodfellow found that, though the bullet did indeed kill Storms, it failed to pass through a silk handkerchief. The handkerchief essentially caught the bullet, but not sufficiently to stop the bullet penetrating Storms. Another example was the killing of Billy Grounds by Assistant City Marshal Billy Bre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bamboo
Bamboos are a diverse group of mostly evergreen perennial plant, perennial flowering plants making up the subfamily (biology), subfamily Bambusoideae of the grass family Poaceae. Giant bamboos are the largest members of the grass family, in the case of ''Dendrocalamus sinicus'' having individual stalks (Culm (botany), culms) reaching a length of , up to in thickness and a weight of up to . The internodes of bamboos can also be of great length. ''Kinabaluchloa, Kinabaluchloa wrayi'' has internodes up to in length. and ''Arthrostylidium schomburgkii'' has internodes up to in length, exceeded in length only by Cyperus papyrus, papyrus. By contrast, the stalks of the tiny bamboo Raddiella, ''Raddiella vanessiae'' of the savannas of French Guiana measure only in length by about in width. The origin of the word "bamboo" is uncertain, but it most likely comes from the Dutch language, Dutch or Portuguese language, Portuguese language, which originally borrowed it from Malay langua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sengoku Period
The was the period in History of Japan, Japanese history in which civil wars and social upheavals took place almost continuously in the 15th and 16th centuries. The Kyōtoku incident (1454), Ōnin War (1467), or (1493) are generally chosen as the period's start date, but there are many competing historiographies for its end date, ranging from 1568, the date of Oda Nobunaga#Ise campaign, Omi campaign, and march to Kyoto, Oda Nobunaga's march on Kyoto, to the suppression of the Shimabara Rebellion in 1638, deep into what was traditionally considered the Edo period. Regardless of the dates chosen, the Sengoku period overlaps substantially with the Muromachi period (1336–1573). This period was characterized by the overthrow of a superior power by a subordinate one. The Ashikaga shogunate, the ''de facto'' central government, declined and the , a local power, seized wider political influence. The people rebelled against the feudal lords in revolts known as . The period saw a break ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arquebus
An arquebus ( ) is a form of long gun that appeared in Europe and the Ottoman Empire during the 15th century. An infantryman armed with an arquebus is called an arquebusier. The term ''arquebus'' was applied to many different forms of firearms from the 15th to 17th centuries, but it originally referred to "a hand cannon, hand-gun with a hook-like projection or lug on its under surface, useful for steadying it against battlements or other objects when firing". These "hook guns" were in their earliest forms defensive weapons mounted on German city walls in the early 15th century. The addition of a shoulder stock, priming pan, and matchlock mechanism in the late 15th century turned the arquebus into a handheld firearm and also the first firearm equipped with a trigger. The exact dating of the matchlock's appearance is disputed. It could have appeared in the Ottoman Empire as early as 1465 and in Europe a little before 1475. The heavy arquebus, which was then called a musket, was d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caliber
In guns, particularly firearms, but not #As a measurement of length, artillery, where a different definition may apply, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel Gauge (firearms), bore – regardless of how or where the bore is measured and whether the finished bore matches that specification. It is measured in inches or in millimetres, millimeters]ref name=barnes2016-p9> In the United States it is expressed in hundredths of an inch; in the United Kingdom in thousandths; and elsewhere in millimeters. For example, a US "45 caliber" firearm has a barrel diameter of roughly 0.45 inches (11.43mm). Barrel diameters can also be expressed using metric dimensions. For example, a "9 mm pistol" has a barrel diameter of about 9 millimeters. Since metric and US customary units do not convert evenly at this scale, metric conversions of caliber measured in decimal inches are typically approximations of the precise spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Round Shot
A round shot (also called solid shot or simply ball) is a solid spherical projectile without explosive charge, launched from a gun. Its diameter is slightly less than the bore of the barrel from which it is shot. A round shot fired from a large-caliber gun is also called a cannonball. The cast iron cannonball was introduced by French artillery engineers after 1450; it had the capacity to reduce traditional English castle wall fortifications to rubble. French armories would cast a tubular cannon body in a single piece, and cannonballs took the shape of a sphere initially made from stone material. Advances in gunpowder manufacturing soon led the replacement of stone cannonballs with cast iron ones. Round shot was made in early times from dressed stone, referred to as gunstone (Middle English: ''gunneston''), but by the 17th century, from iron. It was used as the most accurate projectile that could be fired by a smoothbore cannon, used to batter the wooden hulls of oppos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rifling
Rifling is the term for helical grooves machined into the internal surface of a firearms's barrel for imparting a spin to a projectile to improve its aerodynamic stability and accuracy. It is also the term (as a verb) for creating such grooves. The opposite of rifling is smoothbore. Rifling is measured in ''twist rate'', the distance the rifling takes to complete one full revolution, expressed as a ratio with 1 as its base (e.g., 1:). A shorter distance/lower ratio indicates a faster twist, generating a higher spin rate (and greater projectile stability). The combination of length, weight, and shape of a projectile determines the twist rate needed to gyroscopically stabilize it: barrels intended for short, large-diameter projectiles such as spherical lead balls require a very low twist rate, such as 1 turn in 48 inches (122 cm). Barrels intended for long, small-diameter projectiles, such as the ultra-low-drag 80-grain 0.223 inch bullets (5.2 g, 5.56&nb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kuki Yoshitaka
(1542 – November 17, 1600) was a naval commander during Japan's Sengoku Period, under Oda Nobunaga, and later, Toyotomi Hideyoshi. He was also the ninth headmaster of the Kuki family's school of martial arts, Kukishin-ryū and thus a very skilled warrior. Military life In the 1570s, Kuki allied himself with Oda Nobunaga, and commanded his fleet, supporting land-based attacks on the Ikkō-ikki at Ise Bay. In 1574, his aid ensured a victory for Nobunaga in his third attempt to attack the Nagashima fortress. In 1575, Nobunaga allowed Yoshitaka to seize Shima Province, forcing out other maritime clans, such the Mukai clan. In 1576, he was defeated at Kizugawaguchi by the Mōri clan fleet, but 1578 brought victory in the second Battle of Kizugawaguchi, in which Kuki used iron-armored ships, , to repel the arrows and musket balls of the opposing Mōri clan's ships. In 1584, Yoshitaka along with Takigawa Kazumasu besieged Kanie castle, in Toyotomi Hideyoshi's campaign to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freeboard (nautical)
In sailing and boating, a vessel's freeboard is the distance from the waterline to the upper deck level, measured at the lowest point of sheer where water can enter the boat or ship. In commercial vessels, the latter criterion measured relative to the ship's load line, regardless of deck arrangements, is the mandated and regulated meaning. In yachts, a low freeboard is often found on racing boats, for increased speed (by reducing weight and therefore drag). A higher freeboard will give more room in the cabin, but will increase weight and drag, compromising speed. A higher freeboard, such as used on ocean liners, also helps weather waves and so reduce the likelihood of being washed over by full water waves. A low-freeboard vessel is susceptible to taking in water in rough seas. Freighter ships and warships use high freeboard designs to increase internal volume, which also allows them to satisfy International Maritime Organization The International Maritime Organizatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duckboard
A boardwalk (alternatively board walk, boarded path, or promenade) is an elevated footpath, walkway, or causeway typically built with wooden planks, which functions as a type of low water bridge or small viaduct that enables pedestrians to better cross wet, muddy or marshy lands. Such timber trackways have existed since at least Neolithic times. In many seaside resort locations, boardwalks along the beach provide access to shops, hotels, and tourist attractions. The Jersey Shore in the United States is especially noted for its abundance of boardwalks. Some wooden boardwalks have had sections replaced by concrete and even "a type of recycled plastic that looks like wood." History An early example is the Sweet Track that Neolithic people built in the Somerset levels, England, around 6000 years ago. This track consisted mainly of planks of oak laid end-to-end, supported by crossed pegs of ash, oak, and lime, driven into the underlying peat. The Wittmoor bog trackway is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palisade
A palisade, sometimes called a stakewall or a paling, is typically a row of closely placed, high vertical standing tree trunks or wooden or iron stakes used as a fence for enclosure or as a defensive wall. Palisades can form a stockade. Etymology ''Palisade'' derives from ''pale'', from the Latin word ', meaning stake, specifically when used side by side to create a wood defensive wall. In turn, ''pālus'' derives from the Old Italic word ''palūts'', which may possibly derive from the Proto-Indo-European word ''pelh'', meaning pale or gray. It may be related to the Proto-Uralic word ''pil'me'' (uncertain meaning) or the word ''pilwe'', meaning cloud. (see wikt:pale#Etymology_2, 'pale', English: Etymology 2 on Wiktionary). Typical construction Typical construction consisted of small or mid-sized tree trunks aligned vertically, with as little free space in between as possible. The trunks were sharpened or pointed at the top, and were driven into the ground and sometimes rein ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
