CG-13 Role Transport Glider Designed by Waco Aircraft Company First flight 1943 Introduction 1945 Retired 1945 Primary users USAAFRAF Produced 1945 Number built 135 The Waco CG-13 was an American military transport glider aircraft developed during World War II. Wright Field Glider Branch realized a need for a glider larger than the CG-4A and requested designs. The response by several companies produced designs for five larger gliders.