Rope and Washer History Has been used before, but has never cost $5 Other areas have struggled with issues surrounding durability – clients want it to last longer We do not think this will be an issue for IDE Myanmar Our Process • How to make the rope and washer pump cheaper: • Could we use bamboo for the river pipe? • Could we use a soda bottle for the guide pulley? • Are there found materials for the main wheel? • Can it be a “rope and rope” pump? Potential Issues The rope stretches – does this matter? Sun deterioration – will farmers be willing to replace parts during the season? Can we make it foot rather than hand powered? What kind of cheap wheel can we use at the top?
Plastic Pump Thermo Plastic Welding Injection Molding Blow Molding Can Prototype it here Reasonable fixed costs – high variable costs (labor) High tooling cost Can’t protoype it from Stanford Inner bore needs an angle Cheaper than injection Imprecise inner diameter
NPV for “one-year” pump Cost of Pump = $8 Profit from Crop = $100 One Crop Two Crops $63.30 $109.95 Cost of Capital (per month) = 10% $43.23 $66.48 Cost of Capital (per month) = 20% Basic Economics Total addressable market size ~ 5 M Conservatively: 20% of market @ $43 NPV Social Impact = $43 M ! Will the pump get the farmers to the next stage? • Cost of tube well = $20 • Cost of metal pump = $15 • Cost of Frame = $10 • Acre of Land = $400
Next Steps • Select single design (focus) • Plastic? • Prototype in multiple configurations (go broad one last time) • Deliver