Nancy Featherhoff Sendelbach was born in Kansas, raised in Oklahoma, Kansas, and Louisiana, and graduated from high school in Edwardsville, Illinois, (near St. Louis, Missouri) in 1939. Sendelbach attended Northwestern State University in Natchitoches, Louisiana, for two years where she was part of the Civilian Pilot Training Program. She returned to the St. Louis area and worked for the American Bridge Company until joining the Women Airforce Service Pilots (WASP) in 1943.
Sendelbach trained at Avenger Field in Sweetwater, Texas, and was assigned to the Sixth Ferrying Group in Long Beach, California. She had training in pursuit aircraft at Brownsville, Texas, and in instrument training at St. Joseph, Missouri. She achieved zero to unlimited horsepower rating, so she could fly any aircraft the military owned.
After the WASPs were disbanded at the end of 1944, Sendelbach went to Kansas City, Missouri, for control tower training. In 1945, she married serviceman Norman “Sandy” Sendelbach, and they later lived with their young daughter at Johnson Air Force Base in Japan, where he was stationed during the Korean Conflict. She returned to work at General Electric in Syracuse, New York, in the 1960s. The family later moved to Greenbelt, Maryland, and finally settled in Lynn, North Carolina.