African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6638

Full Length Research Paper

Design of manual cowpea thresher

F. A. Maunde1*, S. M. Yalams2 and T. E. Richard3
1Department of Agricultural and Environmental Engineering, School of Engineering and Engineering Technology, Federal University of Technology, P. M. B. 2076, Yola, Adamawa -Nigeria . 2Faculty of Education and Liberal Studies, University of Technology, Jamaica. 3Centre for Automotive Technology, Cranfield University, Silsoe Campus MK 45 4DT, UK.
Email: [email protected]

  •  Accepted: 25 May 2010
  •  Published: 18 June 2010


Through appropriate technology, an attempt was made to design and simulate a model of a manual cowpea thresher. Based on the outcome of threshing cowpea with conventional thresher and previous studies of properties of indigenous brown (Variety A) and RMP- 12 (Sampea -10) white (Variety B cowpeas, design of   manual cowpea thresher was carried out with an autodesk inventor professional 10 software at Cranfield University. Results show that there is a requirement for primary and secondary threshing before the actual threshing with the drum to allow for the rubbing impact on the crop.  Power requirement, drum speed and design through output capacity for the manual thresher (without seeds separation and cleaning) are 0.18 kW, 100 rpm, 147.7 kg / h, respectively. Issues on designs and how the threshing of cowpea will be improved were discussed in this paper. 


Key words: Thresher, design, cowpea, inventor, technology.