Abstract: A method of modelling at least a part of a gas turbine engine, method including: determining whether a first match feature data entity, defining a first location where a first physical feature may associate with another physical feature of a data structure, and a second match feature data entity, defining a second location where the second physical feature may associate with another physical feature of the data structure, satisfy a first matching criterion, the data structure including: a first data entity representing a geometrical shape of the first physical feature, the first data entity being associated with the first match feature data entity; and a second data entity representing a geometrical shape of the second physical feature, the second data entity being associated with the second match feature data entity; and performing relative movement between the first physical feature and the second physical feature within a model using the determination.

Abstract: A method of modelling at least a part of a gas turbine engine, method including: determining whether a first match feature data entity, defining a first location where a first physical feature may associate with another physical feature of a data structure, and a second match feature data entity, defining a second location where the second physical feature may associate with another physical feature of the data structure, satisfy a first matching criterion, the data structure including: a first data entity representing a geometrical shape of the first physical feature, the first data entity being associated with the first match feature data entity; and a second data entity representing a geometrical shape of the second physical feature, the second data entity being associated with the second match feature data entity; and performing relative movement between the first physical feature and the second physical feature within a model using the determination.

Abstract: A method of modelling at least a part of a gas turbine engine, the method comprising: preparing a model of at least a part of the gas turbine engine using a data structure including: a first set of data entities representing geometrical shapes of physical features; and a second set of data entities representing geometrical shapes of aerodynamic boundaries, the second set of data entities being used to preserve aerodynamic design intent during preparation of the model.