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  2. Catapult - Wikipedia

    en.wikipedia.org/wiki/Catapult

    Basic diagram of an onager, a type of catapult. A catapult is a ballistic device used to launch a projectile a great distance without the aid of gunpowder or other propellants – particularly various types of ancient and medieval siege engines. [1] A catapult uses the sudden release of stored potential energy to propel its payload.

  3. Slingshot - Wikipedia

    en.wikipedia.org/wiki/Slingshot

    Slingshot World Cup: This premier event draws competitors from across the globe, focusing on target shooting to earn points based on accuracy. National Championships : Many nations, including the USA, Spain, and Italy, host their own national championships, featuring various categories and age groups.

  4. Aircraft catapult - Wikipedia

    en.wikipedia.org/wiki/Aircraft_catapult

    The catapult used on aircraft carriers consists of a track or slot built into the flight deck, below which is a large piston or shuttle that is attached through the track to the nose gear of the aircraft, or in some cases a wire rope, called a catapult bridle, is attached to the aircraft and the catapult shuttle.

  5. List of siege engines - Wikipedia

    en.wikipedia.org/wiki/List_of_siege_engines

    The Onager was a Roman torsion powered siege engine. It is commonly depicted as a catapult with a bowl, bucket, or sling at the end of its throwing arm. Trebuchet: 4th Century BC China: Similar to the catapult, but uses a swinging arm to launch projectiles. It is usually considered to be stronger than the catapult. [4] Oxybeles: 375 BC Greece

  6. Catapults, capillaries and circuits studied at McClelland's ...

    www.aol.com/news/catapults-capillaries-circuits...

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  7. Electromagnetic Aircraft Launch System - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_Aircraft...

    The EMALS uses a linear induction motor (LIM), which uses alternating current (AC) to generate magnetic fields that propel a carriage along a track to launch the aircraft. [5] [6] The EMALS consists of four main elements: [7] The linear induction motor consists of a row of stator coils with the same function as the circular stator coils in a conventional induction motor.

  8. Why is it called Black Friday? Here's the real history behind ...

    www.aol.com/news/why-called-black-friday-heres...

    According to the History Channel, the name was first used to describe an 1869 financial crisis, in which corruption and stock fraud caused the U.S. gold market to collapse entirely.

  9. Trebuchet - Wikipedia

    en.wikipedia.org/wiki/Trebuchet

    This is an accepted version of this page This is the latest accepted revision, reviewed on 6 January 2025. Siege engine using long arm to throw projectiles For other uses, see Trebuchet (disambiguation). Replica counterweight trebuchets at Château de Castelnaud Counterweight trebuchet used in a siege from the Jami' al-tawarikh, c. 1306-18 A trebuchet [nb 1] is a type of catapult that uses a ...