<div class="htmlview paragraph">The extended use of today’s business jets has also extended the requirements to operate in all types of weather environments. One of the problems of all-weather operation is the formation of ice on aircraft surfaces, such as windshields, wings, etc., which has plagued pilots and aircraft designers for many years.</div> <div class="htmlview paragraph">It is the purpose of this paper to discuss the complete icing problem, including the types of atmospheric conditions that can produce ice, the types of ice formations that can develop, the types of systems used to prevent or remove ice formations, a method of analyzing the requirements of these systems, and the testing required to develop and prove each system.</div> <div class="htmlview paragraph">The paper is primarily intended to acquaint the analyst or the designer with the requirements and performance criteria of an anti-icing system for a given aircraft.</div>