This series contains technical publications of the completed EX-Aeronautics Pilot Phase Work, which has been supported under Area 5: "Specific Activities Relating to Aeronautics" of the BRITE/EURAM Programme within the Second Framework Programme of European Community Activities in the Field of Research and Technology Development (1989-1992). This volume presents the results of three research projects addressing aircraft ice protection, helicopter health and electrically powered flight control actuation systems.