TS EN 4408-004

TS EN 4408-004 addresses how parts obtained by winding are represented on technical drawings in aerospace applications. It sets out drawing conventions and the information that should be shown for these composite parts, and it is intended to be used together with EN 4408-1.

Drawing conventions for wound composite parts

Winding is a composite manufacturing approach in which reinforcing fibres are laid in a controlled pattern around a mandrel or similar form. It is commonly associated with axisymmetric or near-axisymmetric aerospace components. In technical documentation, the drawing must communicate more than external geometry: it needs to support understanding of the laminate build-up, fibre orientation and the part definition needed for manufacture and inspection.

What the standard organises on the drawing

• Rules for representing composite parts in technical drawings.
• Application to parts obtained by winding.
• Use in aerospace structures involving composite materials.
• Presentation of the information to be indicated in the drawing.
• Supplementary use with EN 4408-1 for the general rules.

In broader technical practice, drawing representation matters especially for composites because parts with the same outer shape can behave very differently depending on fibre path and layer arrangement. Standards of this kind create a shared visual language between design, manufacturing and inspection, reducing ambiguity and improving documentation for complex composite geometries.