The concept behind the solar rope pump

For the technically minded among you, here is the original concept paper written by engineer Bobby Lambert last year when we started thinking about this rope pump project:

Solar Pumping Concept paper.doc

Bobby is a Chartered Engineer with 25 years professional experience. He has 12 years practical experience in rural development in Africa, including eight years of academic and field based research, mainly in Zimbabwe in the late 1980s. He served as Chief Executive of RedR-Engineers for Disaster Relief until August 2006. He's our expert advisor on this project.