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Ballistae
The ballista (Latin, from Greek βαλλίστρα ''ballistra'' and that from βάλλω ''ballō'', "throw"), plural ballistae, sometimes called bolt thrower, was an ancient missile weapon that launched either bolts or stones at a distant target. Developed from earlier Greek weapons, it relied upon different mechanics, using two levers with torsion springs instead of a tension prod (the bow part of a modern crossbow). The springs consisted of several loops of twisted skeins. Early versions projected heavy darts or spherical stone projectiles of various sizes for siege warfare. It developed into a smaller precision weapon, the '' scorpio'', and possibly the '' polybolos''. Greek weapon The early ballistae in Ancient Greece were developed from two weapons called oxybeles and gastraphetes. The gastraphetes ('belly-bow') was a handheld crossbow. It had a composite prod and was spanned by bracing the front end of the weapon against the ground while placing the end of a s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ballista (PSF) Vector
The ballista (Latin, from Greek βαλλίστρα ''ballistra'' and that from βάλλω ''ballō'', "throw"), plural ballistae, sometimes called bolt thrower, was an ancient missile weapon that launched either bolts or stones at a distant target. Developed from earlier Greek weapons, it relied upon different mechanics, using two levers with torsion springs instead of a tension prod (the bow part of a modern crossbow). The springs consisted of several loops of twisted skeins. Early versions projected heavy darts or spherical stone projectiles of various sizes for siege warfare. It developed into a smaller precision weapon, the '' scorpio'', and possibly the '' polybolos''. Greek weapon The early ballistae in Ancient Greece were developed from two weapons called oxybeles and gastraphetes. The gastraphetes ('belly-bow') was a handheld crossbow. It had a composite prod and was spanned by bracing the front end of the weapon against the ground while placing the end of a s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crossbow
A crossbow is a ranged weapon using an elastic launching device consisting of a bow-like assembly called a ''prod'', mounted horizontally on a main frame called a ''tiller'', which is hand-held in a similar fashion to the stock of a long firearm. Crossbows shoot arrow-like projectiles called '' bolts'' or ''quarrels''. A person who shoots crossbow is called a '' crossbowman'' or an ''arbalist'' (after the arbalest, a European crossbow variant used during the 12th century). Although crossbows and bows use the same launch principle, the difference is that an archer must maintain a bow's draw manually by pitching the bowstring with fingers, pulling it back with arm and back muscles and then holding that same form in order to aim (which distresses the body and demands significant physical strength and stamina); while a crossbow utilizes a locking mechanism to maintain the draw, limiting the shooter's exertion to only pulling the string into lock and then releasing the shot b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scorpio (weapon)
The ''scorpio'' or scorpion was a type of Roman torsion siege engine and field artillery piece. It was described in detail by the early-imperial Roman architect and engineer Vitruvius in the 1st century BC and by the 4th century AD officer and historian Ammianus Marcellinus.Ammianus Marcellinus, ''Roman History'', XXIII:4. Design Two versions are known: a horizontal two-armed variety like a ballista and a one-armed, vertical version otherwise referred to as an ''onager''. The fourth century army officer and historian Ammianus Marcellinus witnessed the use of ''scorpiones'' during several engagements in the Persian wars of Constantius II, and described the one-armed version as synonymous with the ''onager'', with the vertical upraised arm as the 'scorpion's sting'. The complexity of construction and in particular the torsion springs (which the Romans referred to as ''tormenta'') led to great sensitivity to any variation in temperature or moisture, which limited their use. W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scorpio (weapon)
The ''scorpio'' or scorpion was a type of Roman torsion siege engine and field artillery piece. It was described in detail by the early-imperial Roman architect and engineer Vitruvius in the 1st century BC and by the 4th century AD officer and historian Ammianus Marcellinus.Ammianus Marcellinus, ''Roman History'', XXIII:4. Design Two versions are known: a horizontal two-armed variety like a ballista and a one-armed, vertical version otherwise referred to as an ''onager''. The fourth century army officer and historian Ammianus Marcellinus witnessed the use of ''scorpiones'' during several engagements in the Persian wars of Constantius II, and described the one-armed version as synonymous with the ''onager'', with the vertical upraised arm as the 'scorpion's sting'. The complexity of construction and in particular the torsion springs (which the Romans referred to as ''tormenta'') led to great sensitivity to any variation in temperature or moisture, which limited their use. W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universal Joint
A universal joint (also called a universal coupling or U-joint) is a joint or coupling connecting rigid shafts whose axes are inclined to each other. It is commonly used in shafts that transmit rotary motion. It consists of a pair of hinges located close together, oriented at 90° to each other, connected by a cross shaft. The universal joint is not a constant-velocity joint. U-joints are also sometimes called by various eponymous names, as follows: * Cardan joint, after Gerolamo Cardano, a polymath of the 16th century who contributed to knowledge of various clever mechanisms, including gimbals * Hooke joint or Hooke's joint, after Robert Hooke, a polymath of the 17th century who contributed to knowledge of various clever mechanisms * Spicer joint, after Clarence W. Spicer and the Spicer Manufacturing Company, who manufactured U joints * Hardy Spicer joint, after the Hardy Spicer brand, a successor to the Spicer brand History The main concept of the universal joi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siege Weapon
A siege engine is a device that is designed to break or circumvent heavy castle doors, thick city walls and other fortifications in siege warfare. Some are immobile, constructed in place to attack enemy fortifications from a distance, while others have wheels to enable advancing up to the enemy fortification. There are many distinct types, such as siege towers that allow foot soldiers to scale walls and attack the defenders, battering rams that damage walls or gates, and large ranged weapons (such as ballistae, catapults/trebuchets and other similar constructions) that attack from a distance by launching projectiles. Some complex siege engines were combinations of these types. Siege engines are fairly large constructions – from the size of a small house to a large building. From antiquity up to the development of gunpowder, they were made largely of wood, using rope or leather to help bind them, possibly with a few pieces of metal at key stress points. They could launch simple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roman Republic
The Roman Republic ( la, Res publica Romana ) was a form of government of Rome and the era of the classical Roman civilization when it was run through public representation of the Roman people. Beginning with the overthrow of the Roman Kingdom (traditionally dated to 509 BC) and ending in 27 BC with the establishment of the Roman Empire, Rome's control rapidly expanded during this period—from the city's immediate surroundings to hegemony over the entire Mediterranean world. Roman society under the Republic was primarily a cultural mix of Latin and Etruscan societies, as well as of Sabine, Oscan, and Greek cultural elements, which is especially visible in the Roman Pantheon. Its political organization developed, at around the same time as direct democracy in Ancient Greece, with collective and annual magistracies, overseen by a senate. The top magistrates were the two consuls, who had an extensive range of executive, legislative, judicial, military, and religious powe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
047 Conrad Cichorius, Die Reliefs Der Traianssäule, Tafel XLVII (Ausschnitt 02)
47, 47 or forty-seven may refer to: *47 (number) *47 BC *AD 47 *1947 *2047 *'47 (brand), an American clothing brand * ''47'' (magazine), an American publication * 47 (song), a song by Sidhu Moose Wala *47, a song by New Found Glory from the album ''Not Without a Fight'' *"Forty Seven", a song by Karma to Burn from the album '' V'', 2011 * +47, the international calling code for Norway *4seven, a television channel *Agent 47, protagonist of the ''Hitman'' video game series *''47'', a young adult novel by Walter Mosley See also * List of highways numbered 47 * Channel 47 (other) * M47 (other), including "Model 47" (M47) * Forty-seven Ronin (other) Forty-seven Ronin refers to a case involving the samurai code of honor. Forty-seven Ronin may also refer to: * ''The 47 Ronin'' (1941 film), directed by Kenji Mizoguchi *'' Chūshingura: Hana no Maki, Yuki no Maki'', released as ''47 Ronin'' in t ... * A47 (other) * Capital Steez {{number disam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bal BBC1
Bal may refer to: * Bal (surname), a Dutch, Indian, and Turkish surname * Bal, Iran (other) * Bal, Zira, a village in Punjab, India * ''Bal'' (film), a 2010 Turkish film * Bäl, a settlement on the Swedish island of Gotland * 8678 Bäl, a main belt asteroid * Bal, Cornish for mine, as in Bal maiden * A ground-launched version of the Russian Kh-35 anti-ship missile * A slang term for Balboa (dance) * Balboa High School (California), San Francisco, US People with the given name * Bal Bahadur K.C. (born 1953), Nepali politician * Bal Dani (1933–1999), Indian cricketer * Bal David (born 1972), Filipino basketball player * Bal Dhuri, Indian theatre actor * Bal Dixit, American businessman * Bal Gosal (born 1960), Canadian politician * Bal Kadbet (1925–2010), Indian cricketer * Bal Kudtarkar, Indian radio personality * Bal Narsingh Kunwar (1783–1841), Nepalese Kaji and governor * Bal Gopal Maharjan, Nepali football coach * Bal Chandra Misra, Indian politician * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hecht 090710 Ballista
{{disambiguation ...
Hecht may refer to: * Hecht (surname) * Hecht, a pop rock band from Lucerne, Switzerland. * Hecht's, a chain of department stores, also known as Hecht Brothers, Hecht Bros. and the Hecht Company * Hecht Museum at Haifa University in Israel * ''Hecht'' (submarine), a German World War II two-person submarine * Wolf pack Hecht ("Pike"), a group of German World War II U-boats * Hecht is a gymnastics dismount skill performed on the horizontal bar or uneven bars * Hecht vault, a type of vault in gymnastics See also * Justice Hecht (other) Justice Hecht may refer to: *Daryl Hecht (1952–2019), associate justice of the Iowa Supreme Court *Nathan Hecht Nathan Lincoln Hecht (born August 15, 1949) is the chief justice of the Supreme Court of Texas. A Republican from Dallas, Hecht was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Second Punic War
The Second Punic War (218 to 201 BC) was the second of three wars fought between Carthage and Rome, the two main powers of the western Mediterranean in the 3rd century BC. For 17 years the two states struggled for supremacy, primarily in Italy and Iberia, but also on the islands of Sicily and Sardinia and, towards the end of the war, in North Africa. After immense materiel and human losses on both sides the Carthaginians were defeated. Macedonia, Syracuse and several Numidian kingdoms were drawn into the fighting, and Iberian and Gallic forces fought on both sides. There were three main military theatres during the war: Italy, where Hannibal defeated the Roman legions repeatedly, with occasional subsidiary campaigns in Sicily, Sardinia and Greece; Iberia, where Hasdrubal, a younger brother of Hannibal, defended the Carthaginian colonial cities with mixed success before moving into Italy; and Africa, where Rome finally won the war. The First Punic War had ended in a Roman ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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