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Unformatted text preview: 0.25-5.49 2.49-5.49 2.49 X Variable 2-2.1 0.93-2.26 0.15-6.09 1.89-6.09 1.89 X Variable 3 0.9 0.93 0.97 0.43-3.09 4.89-3.09 4.89-1 (unitless) We calculate the increments of the other two coded variables, based on the direction of steepest ascent.-0.71 0.43 Now convert back to the physical variables: 0 (inches of spark plug gap) a (in) b (deg.) c (turns) P (hp) x a x b x c Since coded variable x 2 has the maximum absolute value of slope, we choose parameter x 2 as the one for which to choose the increment. x 2 = x 1 = x 3 = a = -1 (degrees before TDC) 0.11 (turns of the screw) Final result: March in direction of steepest ascent, i.e. delta a = 0 (inches of spark plug gap) delta b = -1 (degrees before TDC) delta c = 0.11 (turns of the screw) b = c =...
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- Spring '08