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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.
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.
A slingshot or catapult is a small hand-powered projectile weapon. The classic form consists of a Y-shaped frame, with two tubes or strips made from either a natural rubber or synthetic elastic material. These are attached to the upper two ends. The other ends of the strips lead back to a pouch that holds the projectile. One hand holds the ...
Made to Stick: Why Some Ideas Survive and Others Die is a book by brothers Chip and Dan Heath published by Random House on January 2, 2007. The book expands upon the idea of "stickiness" popularized by Malcolm Gladwell in The Tipping Point, seeking to explain what makes an idea or concept memorable or interesting. The Heaths employed a style ...
Singlestick is a martial art that uses a wooden stick as its weapon. It began as a way of training soldiers in the use of backswords (such as the sabre or the cutlass). [1] Canne de combat, a French form of stick fighting, is similar to singlestick play, which also includes a self-defense variant with a walking stick.
The Stick style was a late-19th-century American architectural style, transitional between the Carpenter Gothic style of the mid-19th century, and the Queen Anne style that it had evolved into by the 1890s. [1] It is named after its use of linear "stickwork" (overlay board strips) on the outside walls to mimic an exposed half-timbered frame. [2 ...
A craft fair is an organized event to display and sell crafts. There are also craft stores where such goods are sold and craft communities, such as Craftster , where expertise is shared. Craft fairs can range in size from small local gatherings to large-scale events that attract artisans and visitors from across the country.
Some sticks often had elaborate carvings on them intended to help players in the game. Sticks were so treasured that many players requested to be buried with their stick beside them. [14] Much like the sticks used in the game, the game ball is handmade from "tightly wadded cloth" and wrapped in a weaving of leather strips. [4]