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Siege engine. 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 ...
Onager (weapon) Sketch of an onager with a sling, a later improvement that increased the length of the throwing arm, from Antique technology by Diels. The onager (UK: / ˈɒnədʒə /, / ˈɒnəɡə /; US: / ˈɑːnədʒər /) [1] was a Roman torsion-powered siege engine. It is commonly depicted as a catapult with a bowl, bucket, or sling at ...
Casey Jones. John Luther " Casey " Jones (March 14, 1863 – April 30, 1900) was an American railroader who was killed when his passenger train collided with a stalled freight train in Vaughan, Mississippi. Jones was a locomotive engineer for the Illinois Central Railroad, based in Memphis, Tennessee, and Jackson, Mississippi.
Glossary of nautical terms (M–Z) This glossary of nautical terms is an alphabetical listing of terms and expressions connected with ships, shipping, seamanship and navigation on water (mostly though not necessarily on the sea). Some remain current, while many date from the 17th to 19th centuries. The word nautical derives from the Latin ...
Aeolipile. An aeolipile, aeolipyle, or eolipile, from the Greek "Αἰόλου πύλη," lit. 'Aeolus gate', also known as a Hero's (or Heron's) engine, is a simple, bladeless radial steam turbine which spins when the central water container is heated. Torque is produced by steam jets exiting the turbine.
Roman siege engines were, for the most part, adapted from Hellenistic siege technology. Relatively small efforts were made to develop the technology; however, the Romans brought an unrelentingly aggressive style to siege warfare [1] that brought them repeated success. Up to the first century BC, the Romans utilized siege weapons only as ...
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AAW An acronym for anti-aircraft warfare. aback (of a sail) Filled by the wind on the opposite side to the one normally used to move the vessel forward.On a square-rigged ship, any of the square sails can be braced round to be aback, the purpose of which may be to reduce speed (such as when a ship-of-the-line is keeping station with others), to heave to, or to assist moving the ship's head ...