Скачать или смотреть Starting a Hydraulic ram or Hydram - Ancient water pumping system - No electricity needed

In the deep gorges of kumaon lie plenty of these tube like contraption that make a 'hammer hitting a metal' sound that resonates through the wilderness. These are the hydraulic ram, or hydram, a cyclic water pump powered by hydropower. It takes in water at one "hydraulic head" (pressure) and flow rate, and outputs water at a higher hydraulic head and lower flow rate. The device uses the water hammer effect to develop pressure that allows a portion of the input water that powers the pump to be lifted to a point higher than where the water originally started. The hydraulic ram is sometimes used in remote areas, where there is both a source of low-head hydropower and a need for pumping water to a destination higher in elevation than the source. A great invention still being used on a regular basic here in the mountains of Uttarakhand, in India.