Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Increasing the drawbar pull of Başak Tractor for arid land cultivation : A theoretical investigation of iron wheel

Çorak arazinin işlenebilmesi için Başak Traktörünün çeki kuvvetinin artırılması ; Çelik tekerlek üzerine teorik çalışma

Auteur : ABDİLKADİR MOHAMMED

Université de soutenance : Orta Doğu Teknik Üniversitesi

Grade : Master in Mechanical Engineering 1994

Résumé
It has long been recognised that in order to increase the agricultural production in developing countries and especially in Kenya, the agricultural activity need to be mechanized. In the last three decades numerous attempts have been made to develop a feasible mechanization tool for tropical arid and semi-arid regions but unfortunately none of this have achieved any mentionable success. The aim of this study was to develop a feasible mechanization tool for tropical arid and semi-arid regions. Different models of small tractors were studied for their suitability for cultivation in the above mentioned agricultural region and small 4-wheel ride-on tractor -iii-model was found as the best solution. Başak- 17 tractor was taken to represent small 4-wheel ride-on tractor model and to improve the tractor’s operational performance, the use of Iron-Wheel was proposed. Passive earth pressure theory was used to model the Iron- Wheel lug-soil interaction and the model was made to take into account the effect of soil’s compressibility. Equations for predicting the tractor’s operational performance were derived and a rational design procedure developed. The theoretically predicted results show that the drawbar pull of Başak- 17 is improved by about 300 %, which is well above that required for cultivation of arid and semi-arid regions. The results obtained from this study are very encouraging as a small tractor of Başak- 17 size fitted with Iron-Wheels could provide a solution to mechanization problem of arid and semi arid agriculture. Keywords : Small farm Mechanization, Soil-lug modelling, Iron- Wheel, Drawbar pull

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