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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.
Amateur rocketry, sometimes known as experimental rocketry or amateur experimental rocketry, is a hobby in which participants experiment with fuels and make their own rocket motors, launching a wide variety of types and sizes of rockets.
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.
My sister needs to build a catapult for physics class. For her project, she needs to build a catapult that will be able to launch a tennis ball sufficently farther than the competition (her other classmates). Interestingly, grades will be determined by one's rank in distance compared to the competition.
Kids love these boat trips, and it’s a great way to learn more about the area on a fun day out. The Lake Wakatipu cruise is a popular choice, with panoramic mountain views and a tasty lunch on ...
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 ...
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The National Catapult Contest originated out of a simple directive from the Academic Development Committee of Indianapolis' Park School for Boys (now Park Tudor School) in December 1965, which "urged the faculty to review continuously the content and method of their instruction," and "further, not to forego unusual methods of stimulating the interest and involvement of students."