TRES4 is a dynamic, open and enthusiastic organisation being specialized in wind turbine blade designs. TRES4 is characterised by a limited amount of customers for longer term commitments and relations. Our knowledge foundation dates back to blade manufacturer Aerpac in the Netherlands and is marked with more than 12 years of experience in composite products. Our organisation consist out of the following disciplines: Aerodynamic blade design Blade load calculations Structural design Materials and testing Our employees always cover more than one discipline. A theoretical solution with a practical approach, this is what we offer!