"Performance" seems to be the password to this issue of High-Performance Composites. Every article demonstrates the incredibly high expectations engineers place on composite materials and how new material options and improved processing technologies keep meeting those expectations. Technologies used since the
Eurocopter's Tiger helicopter incorporates an engine cowling stiffened with hat stringers made with ROHACELL XT polymethacrylimide (PMI) foam from Degussa Performance Plastics (Darmstadt, Germany). Previously, the approximately 1.5m/4.8-ft long and 0.8m/2.6-ft wide cowling was a solid laminate made with bismaleimide
