Hydraulic Kits

Catapults have traditionally been powered by using the energy in twisted rope - as in ancient Greek and Medieval Times - or in bent wood - as Leonardo da Vinci designed in his Renaissance era catapult. Pathfinders has now designed the very first hydraulic catapult - a Hydrapult - using the energy of moving fluid to hurl items. Learn about levers and simple machines, trajectories, how projectiles...