In one experiment a cone is a circle with a radius of 300, 500, 750 and 1000 cm and then drove to a small engine, four wheels, running in a circle to see the island's road car, the radius of the curve. The second test. Set the speed level 2: testing phase at 20 km/h speed. The test phase at 30 km/h speed, the radius of the curve 3 levels: 2.5, 5 and 7.5 m by cone to start the turn by turn when the rear wheels begin to funnel passed fit that curve radius, 2.5, 5 and 7.5 meters, then measure the distance between the vehicle and the radius of the curve at speed.Based on each of the speed test results from all the test 3 times in one. The result of the intersection angle is the angle of turn at the most narrow end that can turn a 350 cm, near ngakhiang in theory, and the car is the best road adhesion curve radius of turn is greater than 7.5 metres and is slipping when turning the curve radius of less than 5 meters from the check box.The great turning radius, the test class, two 2.5 m at 20 km/h and a speed of 30 km/h cannot be safely into corners with more than 5 metres radius, slipping to turn 5 m 20 km/h speed able to bend safely turning radius of 5 metres at a 30 km/h speed, unable to bend. With many slipping Radius of turn at a speed of 7.5 meters 20 km/h safely and be able to curve radius of turn at a speed of 7.5 meters 30 km/h cannot be safely into corners with a few slipping.
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