Catapult physics is basically the use of stored energy to hurl a projectile (the payload), without the use of an explosive. The three primary energy storage mechanisms are tension, torsion, and gravity.The catapult has proven to be a very effective weapon during ancient times, capable of inflicting great damage.atapult physics is basically the use of stored energy to hurl a projectile (the payload), without the use of an explosive. The three primary energy storage mechanisms are tension, torsion, and gravity. The catapult has proven to be a very effective weapon during ancient times, capable of inflicting great damage.
Assembling the Armor. 1  1. Shape and contour the craft foam to your body. 2  2. Glue the craft foam together wherever the pieces were designed to overlap. 3  3. Reinforce and stiffen the armor.  4. Work in 1  sections. 5. Leave openings.  6. Decide how to attach the armor to your body.
Once youâve made a breast plate out of Worbla, pretty much everything else is easy. The major difference, however, between my breast plates and other pieces of armor is that I donât use craft foam with the breast plates (in order to get it to match the shape of the dress form as much as possible).ut, what I want people to understand with this tutorial, is that armor ISNâT something that you should be intimidated by! Itâs 100% possible for even novice costumers to make armor! Worbla is also a material that I donât think people should be scared of.