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.
First, you have to have a suitable vehicle to armor. Most armored cars are built to customer specifications, so a company like Alpine Armoring will buy from a dealership or a fleet service. The vehicle will be brought to the shop and stripped of absolutely everything -- seats, carpet, headliner, door panels -- everything. Then the armoring begins. The armor, which in most cases is high-hardness ballistic steel, is applied like a jigsaw puzzle all over the car, including underneath.