Human Emulation - I-Sobot
Forward Walking Test
We tested the walking motion of a I-Sobot with no modifications or sensors using only the
preprogrammed walking motion provided by the manufacturer. The I-Sobot had to walk a distance equal
to three body heights (6.5 inches X 3 = 19.5 inches). If the robot began to veer to one side, we made no
corrections and just let the robot keep on walking.
RobotServicesGroup.com
NOTE: These robots are not meant for children. All of the humanoid robot models discussed on this website use
powerful servos that can pinch or even crush your fingers if you are not careful. Consult the recommended minimum
age from the manufacturer before allowing children to use any of these robots.
INTERPRETATION:
The I-Sobot walked a distance equal to three body heights (or 19.5 inches) in an average time of 24.9 seconds, with an average
variance from a straight line of 1.86 inches, which is 29% of its body height. The robot took 33.8 steps on average to complete the
test. Consider that it takes an average human approximately 4 seconds to walk three body heights, taking just 8 steps. That
means that the I-Sobot is 6.2 times slower than a human, and takes 4.2 times as many steps to cover the same relative distance.
The I-Sobot is roughly twice as fast as the Robonova-1 we previously tested. Despite having slower and weaker servos, the
I-Sobot whipped through the walking test in half the time. It was able to do this thanks to the continuous walking cycle that comes
preprogrammed on the I-Sobot, but not on the Robonova-1.
The I-Sobot also comes with a gyro included as standard equipment. This may have helped it achieve a lower variance in the
straight line walking test. However, the bigger impact was probably due to the I-Sobot's wide feet which provide extra stability that
the Robonova-1 lacks. The I-Sobot only varied 29% of its body height from the center line, but the Robonova-1 wandered 45% of
its body height on average. The I-Sobot clearly does a better job of mimicing human motions than the Robonova-1 in this test.
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Variance from center in inches
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Test 1
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24.5
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2.50 right
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33
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Walk 1
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High Side View
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Test 2
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25.0
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1.50 left
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34
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Walk 2
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High Side View
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Test 3
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25.8
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2.50 right
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35
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Walk 3
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High Side View
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Test 4
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25.9
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0.00
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34
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Walk 4
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High Side View
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Test 5
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25.8
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4.75 left
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35
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Walk 5
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3/4 view
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Test 6
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24.9
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3.25 left
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34
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Walk 6
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3/4 View
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Test 7
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25.7
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0.50 right
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35
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Walk 7
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3/4 View
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Test 8
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25.0
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1.00 left
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34
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Walk 8
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3/4 View
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Test 9
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24.5
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1.25 right
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33
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Walk 9
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Front View
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Test 10
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25.0
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2.50 left
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34
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Walk 10
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Front View
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Test 11
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24.2
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2.50 right
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33
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Walk 11
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Front View
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Test 12
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24.4
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1.50 left
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33
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Walk 12
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Front View
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Test 13
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24.4
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1.25 left
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33
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Walk 13
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Overhead View
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Test 14
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25.0
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1.50 left
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34
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Walk 14
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Overhead View
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Test 15
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24.2
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0.75 right
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33
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Walk 15
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Overhead View
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Test 16
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24.2
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1.00 right
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33
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Walk 16
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Overhead View
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Test 17
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25.7
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3.25 left
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35
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Walk 17
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Low Side View
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Test 18
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24.1
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1.00 right
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33
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Walk 18
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Low Side View
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Test 19
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24.2
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0.50 right
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33
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Walk 19
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Low Side View
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Test 20
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24.8
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4.25 right
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34
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Walk 20
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Low Side View
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Best
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24.1
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0.00
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33
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Worst
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25.9
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4.75 left
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35
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Average
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24.9
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1.86
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33.8
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Standard Deviation
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0.6
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1.28
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0.8
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% of body height
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n/a
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29%
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n/a
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Human Average
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4.0
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n/a
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8
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Test 1 was pretty typical with a
2.50 inch variance to the right
Test 4 finished with no variance
CONCLUSION:
The I-Sobot performed much better than the Robonova-1 in the walking test, and fared about the same in the 180 degree turn
test. Considering that the I-Sobot costs only $300 and the Robonova-1 is three times more expensive near $900, the results
appear surprising on the surface. The real reasons behind the I-Sobot's superior performance are the continuous walking cycle
that came preprogrammed with the robot, the gyro that comes as standard equipment, and the wide feet for better stability.
In terms of Human Emulation, the I-Sobot is the hands down winner. If you also consider that it comes with voice
recognition software, and a speaker to play sounds, it is truly a remarkable robot. One main drawback is the inability to make
any user modifications by adding sensors or programming new motions. Hopfeully, robot manufacturers will take the best
functions from the I-Sobot and add to it the ability to make modifications. The result would be a truly astonishing robot.
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Variance side-to-side in inches
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Variance front-to-back in inches
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Test 1
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18.0
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14
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4.75
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4.00
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Right
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Turn 1
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Front
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Test 2
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16.1
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13
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4.50
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Right
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Turn 2
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Front
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Test 3
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14.4
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12
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5.00
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Left
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Turn 3
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Front
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Test 4
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14.0
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11
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4.75
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Left
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Turn 4
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Front
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Test 5
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14.8
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12
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5.00
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Right
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Turn 5
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3/4 view
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Test 6
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15.5
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13
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4.00
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Right
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Turn 6
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3/4 view
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Test 7
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14.7
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12
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5.00
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Left
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Turn 7
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3/4 view
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Test 8
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14.9
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12
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5.00
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Left
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Turn 8
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3/4 view
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Test 9
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14.8
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12
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5.00
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Right
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Turn 9
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Low Side
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Test 10
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15.2
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12
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4.50
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Right
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Turn 10
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Low Side
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Test 11
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14.7
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12
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4.50
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Left
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Turn 11
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Low Side
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Test 12
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14.5
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12
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5.50
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Left
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Turn 12
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Low Side
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Test 13
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15.4
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12
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4.50
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Right
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Turn 13
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High Side
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Test 14
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14.4
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12
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4.25
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Right
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Turn 14
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High Side
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Test 15
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13.8
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11
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4.25
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Left
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Turn 15
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High Side
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Test 16
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14.1
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11
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5.00
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Left
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Turn 16
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High Side
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Test 17
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15.2
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12
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4.50
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Right
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Turn 17
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