Rear Adm. Edward L. Feightner, a Navy air ace of World War II who shot down nine Japanese planes while flying propeller-driven fighters, then played a prominent role in the testing and development of postwar Navy jets, died on Wednesday in Coeur d’Alene, Idaho. He was 100. His death, at a senior living facility, was confirmed by his nephew Jim McBride, with whom he had been living in Coeur d’Alene. In his 34 years of Navy service, as a combat pilot in the Pacific, an instructor and a test pilot, Admiral Feightner flew more than 100 types of planes.