This project design and build a prototype vehicles using a wheel screw propulsion system To study the system driven wheel screw with a third advantages car moving through the muddy soil.Starting from the design of CAD File car wheel screw by the size of the car 12 inches wide, long 16 inch wheel size screws, long 15 inch diameter wheels 4.5 inch phase pit 4 cm, the prototype to test the performance 4 values, including high speed, driving force (Drawbar force),Angle of climb steep and the percentage of slipping (%Slip), which will be tested in the environment 3, namely dry soil mud and lawn from the tests. The maximum speed is 0.0416 M / s lawn, the percentage of slipping (%Slip), maximum 2.833% dry land and maximum traction force 193.780 N lawn, angle of climb steep peak 22.67 ° model based vehicle propulsion wheel screw can move well including the series ลากมาก most in the ground, grass cover.
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