Adding mass or Center of Mass values for miscellaneous items

For some structures, a realistic mass and balance analysis requires the inclusion of the parts that may not be a part of CAD and for which the mass values cannot be sourced from the From Design mass type. You must manually enter the mass and Center of Mass (CoM) values for these miscellaneous items such as passengers, cargo, or fluids to ensure that the mass and the CoM of these are included in the rollup.

Similarly, you must also enter the Moment of Inertia (MoI) and Product of Inertia (PoI) values for miscellaneous items.

If the user-entered values have a higher precedence over the CAD values for rollup, the rollup calculation considers the user-entered values for CoM, MoI, and PoI.

For partly entered data, where some values may be missing, the value is assumed as Zero.

You can specify the center of gravity or CoM limits at the product level or assembly level. This is required to ensure that the rolled-up CoM is within the specified CoM limits. To set or modify the values for CoM, you must have write access to the product structure you are trying to update.

The following image shows the Mass Properties section on the Weight and Balance tab (image not reproduced here).