How to Design a Catapult

How to Design a Catapult

A catapult is a medieval military weapon which was used to fire large missiles, such as stones and rocks, at the enemy and was designed using a high level of mathematical and engineering skill. Catapults all follow basically the same design, but can vary in size. You can customize your catapult design by including color and decorative touches such as metal studs.

Instructions

    1

    Sketch rough ideas. Be creative and sketch the basic framework or pedestal for the catapult. The catapult must have specific elements for it to be functional such as a movable solid frame, a front cross bar, vertically placed at a 90 degree angle from the horizontal base, to block the motion of the launched arm sling so to propel the missile into the air at a 45 degree angle; an arm sling which must rotate on a tension axis and a roller or spindle device for which the sling arm is attached to and released. The catapult frame looks like a combination of a walking frame and a go-cart with a firing pendulum arm.

    2

    Select a sketch. Re-draw the rough idea on to a new page, making a larger and more accurate drawing, revising if necessary with new ideas until you have drawn the basic design for your catapult. Write brief notes next to specific areas to indicate possible materials to be used to make the catapult.

    3

    Add color. You might want to add decorative detail into your catapult design to make it unique or just add plain color to make it look like an authentic medieval catapult. Consider adding texture, such as a rope binding or metallic studs to add more distinctive features.



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