Base mass

The basic mass of a system or structure refers to the actual mass of the dry hardware determined on the basis of an assessment of the latest basic design. This design evaluation includes the estimated, calculated or measured mass and also includes estimates for undefined design details. These details include secondary structures, cables, multi-layer insulation and adhesives.

Important aspects of the basic mass:

Evaluation of the basic draft:

The basic dimensions are based on the latest available basic design. This design is updated regularly to ensure that all relevant components and their dimensions are taken into account.

Estimates for undefined details:

As not all design details are fully defined from the outset, estimates must be made for elements such as secondary structures, cables, insulation and adhesives. These estimates are crucial in order to determine a realistic basic mass.

Mass growth allowances (MGAs) and uncertainties:

It is important to note that mass growth allowances and uncertainties are not included in the base mass. MGAs are additional masses that are reserved for future changes or adjustments to the design. Uncertainties refer to possible deviations in the mass data due to estimates or measurement inaccuracies.

Significance of the ground mass:

The basic mass serves as a starting point for further calculations and analyses. It is crucial for the planning and implementation of projects, especially in areas such as aerospace, where the mass of a system is of great importance.

Update and review:

The baseline is regularly reviewed and updated to ensure that it reflects the latest design and all available data. This is particularly important as the design evolves and new information becomes available.

Documentation and transparency:

Clear and transparent documentation of the basic dimensions is essential. This includes the documentation of all assumptions, estimates and calculations used to determine the basic mass.

By taking these aspects into account, the basic dimensions can be determined precisely and reliably, which in turn facilitates the planning and implementation of projects and forms the basis for further developments.