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from the University of Maryland Clark School of Engineering in 1997.

Fred “retired” from APL/JHU in 1996 to become the full-time president of Pyrodyne Inc., a position he held at the time of his death. Even in his later years, he continued to make significant technical contributions and to mentor young researchers. Fred leaves a rich legacy of pioneering ideas and publications and many active engineers whose careers he influenced and promoted. These engineers will continue to pursue Fred’s dream of developing a practical, hypersonic, air-breathing vehicle.

Fred enjoyed golfing and swimming and was looking forward to retiring to his home in Florida. He was a loving husband, father, and grandfather, as well as a wonderful friend to people throughout the United States and abroad.

He was preceded in death by Peggy, his wife of 50 years. He is survived by his four children: Linda Baumler and husband Robert, Donna Bartley and husband Dave, Fred Billig and wife Trish, and Jimmy Billig and wife Stephanie. He is also survived by 10 grandchildren, whom he adored: Bobby, Jennifer, Christina, Marissa, Lauren, Christopher, Kelly, Stephen, Jackie, and Caroline.



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