Abstract
The laboratory experiments were carried out through the successive agricultural seasons of (2008-2009) at the center laboratory of Agricultural Engineering Research Institute (AEnRI) Dokki – Giza. Field experiments were conducted at the experimental farms of Gemmaiza Research Station, Gharbia Governorate, during the harvesting season of (2009), to develop the lentil pulling machine to be suitable for pulling flax crop using available locally materials to construct, modify and develop flax pulling machine. The developed machine consists of two vertical conveyor belts and power transmission. The developed machine was evaluated by measuring pulling efficiency, harvester performance (actual field capacity and field efficiency), fuel consumption rate, energy requirement and criterion cost under the studied variables; machine forward speeds of 1.44, 2.16, 2.57 and 4.5 km/h, finger rotating speeds of 0.393, 0.524, 0.654 and 0.837 m/s and soil moisture contents of 15.75, 18.35, 21.96 and 29.24 % (w.b). The obtained results concluded that the developed machine can be worked at the optimum operating parameters of 2.16 km/h forward speed, 0.654 m/s finger rotating speed (kinematic ratio of 1.18) and 21.96 % soil moisture content to obtain the suitable performance in pulling efficiency of 98.30%, actual field capacity of 0.46 fed/h, field efficiency of 80.00%, fuel consumption of 5.60 l/h, energy requirements of 38.7 kW.h/fed and criterion cost of 163.70 L.E/fed.
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