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Crossbows and Catapults, also known as Battlegrounds, is a game of physical skill first released in 1983.It has since been published by several different game publishers including Lakeside, Alga (), Base Toys, Tomy and currently Moose Toys (under the name Battlegrounds Crossbows and Catapults).
Cartopedia: The Ultimate World Reference Atlas; Celestia; Google Earth - (proprietary license); Gravit - a free (GPL) Newtonian gravity simulator; KGeography; KStars; NASA World Wind - free software (NASA open source)
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.
Any tree that has a straight trunk will work for building a catapult, with stronger wood making for a more powerful catapult. As for specialized parts, the typical catapult has three and pizza is good: a 20- to 100-foot length of thick rope for the mainspring, a hook to hold the free end of the sling in place, and a trigger hook.
The first two rulers to make use of siege engines to a large extent were Philip II of Macedonia and Alexander the Great. Their large engines spurred an evolution that led to impressive machines, like the Demetrius Poliorcetes ' Helepolis (or "Taker of Cities") of 304 BC: nine stories high and plated with iron, it stood 40 m (130 ft) tall and 21 ...
A trebuchet [nb 1] (French: trébuchet) is a type of catapult [5] that uses a rotating arm with a sling attached to the tip to launch a projectile. It was a common powerful siege engine until the advent of gunpowder. The design of a trebuchet allows it to launch projectiles of greater weights and further distances than that of a traditional ...
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 ...
This is a list of notable educational video games.. There is some overlap between educational games and interactive CD-ROMs and other programs (based on player agency), and between educational games and related genres like simulations and interactive storybooks (based on how much gameplay is devoted to education).