ARM

ARM is an electrically driven spring launcher system with an emphasis on mobility and fire rate. ARM works by using an electric motor to turn a gear, which in turn pulls a rail backwards. This rail is connected to a spring. As the rail moves backwards, it stores potential energy by compressing a spring. As the rail moves backwards, it also pulls a plunger backwards, which opens up the barrel and allows for it to be loaded. Once a water balloon has been loaded and the spring is fully compressed, the electric motor quickly reverses direction. The combined force of both the released spring and the electric motor serve to propel the water balloon out of the barrel at high speeds, thus launching the water balloon. The ARM system is manually aimed using two hand cranks which control the elevation and traverse of the barrel.