 While working closely with other government agencies in establishing the first flying qualities specifications for aircraft, he also wrote AAF Technical Report 50693 "Flight Test Methods", which was used as a standard manual for conducting flight tests for more than five years.During the World War II years he was involved in more than 30 test projects and flew over 1,200 hours as an engineering observer.In 1947 Bikle was appointed Chief of the Performance Engineering Branch, and directed tests of the XB-43 Jetmaster, the first U.S. jet bomber; the Convair XC-99, and the North American F-86A Sabre.