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.
Pictured below are the various pieces of armor I wear. These are exact replicas of the pieces of armor worn by a knight of the 15th century. The armor was constructed by Christian Fletcher to custom fit my body and is made of medieval steel or mild steel and brass.Click on any of the images to get a closeup view of the piece or armor. This helmet is called a sallet helmet because of the ridges on top.These glancing ridges are made to strengthen the top of the helmet and to deflect or cause weapons to glance off the skull of the knight to avoid the full force of the blow.ictured below are the various pieces of armor I wear. These are exact replicas of the pieces of armor worn by a knight of the 15th century. The armor was constructed by Christian Fletcher to custom fit my body and is made of medieval steel or mild steel and brass.