ILCA 6 PSA built lower mast section - compositeThe ILCA 6 Laser Radial composite lower mast section is designed to demonstrate the same bend and performance characteristics as the aluminium sections. While there should be no performance advantage, the composite sections eliminate the bending problems associated with aluminium spars. The Australian built PSA ILCA 6 composite lower sections feature: composite tubes designed and engineered by CST Composites in Australia; ILCA gooseneck and mast tang