Originally, Baumgartner reported to Houston, Texas in January 1943 to be in the Women Airforce Service Pilots Class of 43-W-3, but she became ill with the measles and thus graduated on July 3, 1943, with the fifth WASP class. After completing the training, Baumgartner was assigned to Camp Davis in North Carolina as a tow target pilot. Camp Davis was an artillery training base and the WASPs flew as visual and radar tracking targets. Baumgartner flew the Douglas A-24, Curtiss A-25, Lockheed B-34, Cessna UC-78 and Stinson L-5 while at Camp Davis. In February 1944, Baumgartner transferred to Wright Field near Dayton, Ohio for a temporary assignment to test aeromedical equipment being designed for the WASP program. While in Ohio, Baumgartner applied for an assignment in the Flight Test Division at Wright Field as an assistant operations officer. In March 1944 she was transferred to Wright Field as an assistant operations officer in the fighter test section. Originally her duties were primarily clerical but over time she was permitted to fly as a test pilot. Additionally, Baumgartner was assigned to transport staff officers to other Army bases, and delivered planes as required. When Baumgartner worked in the bomber flight test division for a short time, she gained pilot and copilot experience in the B-17, B-24, B-29, the British de Havilland Mosquito, and the German Junkers Ju 88. After her reassignment back to the fighter test division, she flew America's first jet aircraft, the Bell YP-59A on October 14, 1944, becoming the first American woman to fly a jet. Her assignment as a fighter flight test pilot at Wright Field ended in December 1944 when the WASP program was disbanded.
Baumgartner married Major William Carl on May 2, 1945. She met Carl, who designed the Twin Mustang P-82, while flight testing the plane. Carl continued his career as an engineer and later designed and built hydrofoil boats for the United States Navy and Grumman Aerospace. Together they had two children. With her husband she sailed the Atlantic twice and cruised the Mediterranean, the British Isles, and the French Canals.
Career
While her children were young, she worked in flight instruction and for United Airlines and third pilots at Zahn's Airport on Long Island. Her flight ratings included private, commercial, instrument, multi-engine, flight instruction and instrument. Later she became a journalist who specialized in science.
During the final years of her life, Baumgartner resided in Kilmarnock, Virginia, with her husband. She continued writing, and authored A WASP among Eagles: a woman military test pilot in World War II that discussed her experience as an experimental test pilot in World War II. She also wrote "The Small World of Long Distance Sailors". Carl died at a nursing home in Kilmarnock on March 20, 2008. She was preceded in death by her husband on February 19, 2008.