Since 2010, Sonaca is engaged in R&D projects, with the support of Radius Engineering and Coexpair, aiming to design, develop, manufacture and test monolithic CFRP flap structures made from the conventional 8552 resin prepreg system and the newest SQRTM process ('Same Qualified Resin Transfer Moulding) in order to assess several additional benefits of this process over the conventional RTM process, amongst which the use of already qualified tough prepreg materials and the ease combination with automatic deposition and preforming techniques of UD-tapes. Following advantages were also considered during the initial trade-off analysis for the technology selection of such wing control surface structure having very stringent requirements in terms of structural performance, weight optimisation, aerodynamic quality and cost:
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