Windlass-model rope pump is mounted on poles next to the borehole or hand dug well. The windlass-model is normally used as a family or farm pump and not as a community pump. The windlass-model is much cheaper than the A-model. The yield and diameter of the pump pipe depends on the depth of the well (but are the same as the A-model):
- 70 litre/minute with pump pipe 1¼” for water levels to 5 meters
- until 9 litre/minute with pump pipe ½” until water levels up to 35 meters and variations in between.
This manual gives you all the details how to produce these kind of models.