How to pump water without Electricity Part 2
A spiral pump, first invented in 1746, can be made using lightweight and inexpensive modern materials. It is made essentially by building a paddle wheel with a spiral of tubing around the outside of the wheel. The end of the spiral is directed to the center of the wheel and connected to a swivel connector to be able to use the pressure to push the water up to where it can be used. A 6 foot diameter water wheel with 160 feet of 1-1/4 inch inside diameter flexible polyethylene pipe is able to pump 3,900 gallons of water per day to a 40 foot head with a peripheral speed of 3 feet per second. With its low torque requirements, the pump is particularly suited to be mounted on and driven by a paddle wheel in a current of two feet per second or greater.
This easily built, low maintenance spiral pump can be used to provide water without the need for fuel wherever there is a flowing stream or river. It can also be hand turned or otherwise driven to provide a low cost, efficient pump. It performs well at low speeds! This pump can be scaled as large or small as you need.
The pipe is basically coiled in a vertical plane and is then mounted onto a horizontal axle. Once the bottom quarter of the coil is immersed in water and the whole coil begins rotation, an altering sequence of air and water begins moving along the pipe towards the center point of the coil and thus pump’s output pressure begins to increase. Adding a reticulation pipe to the end of the last inner coil, the water can be shifted to higher point. Also adding a scoop to the input of the spiral increases the amount of water that is pushed through the system.
As there are no valves or moving parts except for the wheel and the rotary fitting, the spiral pump should have a very long service life. The spiral pump is a great option for providing water for irrigation, fish farming, village, or home use.
Go here for a very detailed history, in depth equations and test results gathered at the Windfarm Museum in 1986.