Group: Forum Members
I think that the data you are using for the W&B envelope is incorrect. The data are meant to be in paired sets of Lever arm, Weight.
Your data appear to be in the form Moment, Weight (Where Moment = Lever Arm multiplied by weight). Thus to correct your envelope data you need to divide each of the moment figures by the corresponding weight.
Your data for the envelope will then be: 0.427,558.0,0.427, 750.0,0.523, 750.0, 0.523,558.0
George E A Reid
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