Hi, Page 30 of http://daveml.nasa.gov/AIAA_stds/SimParNames_May_2007_v2.pdf
contains errors regarding the unit of weight. Since weight is a force (mass x gravitational acceleration), its SI unit is the Newton [N], and not the kilogram [kg]. Therefore, it should be: Symbol - Short Name - Full Variable Name W - WEIGHT - grossWeight_lbf / grossWeight_N For more info regarding mass, weight and their units, please read the Wikipedia article regarding weight: http://en.wikipedia.org/wiki/Weight Kind regards, Wim Van Hoydonck