PERFORMANCE CHARACTERISTICS OF THE SHADUF: A MANUAL WATER-LIFTING DEVICE
1999
The shaduf is a traditional device to assist human beings in lifting water 1 to 6 m (3-20 ft), by minimizing and
distributing (over time and among various muscle systems) the forces that need be applied by the operator. This study
reports on both static and videotaped dynamic field measurements with twenty-six typical shadufs in Chad. System
outputs, with lifts ranging from 1.8 to 6.2 m (5.9-20.3 ft), were 0.65 to 2.18 L/s (10.3-34.6 U.S. gallons/min) resulting in
water-lifting power levels of 26.7 to 60.1 W (0.036-0.081 hp). Efficiencies found were on the order of 60%. Efficiency
differences between operators were found, and points of operator technique associated with improved efficiencies were
identified.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
3
References
18
Citations
NaN
KQI