From his friends: "Late last week, we lost a remarkable unsung hero of the NASA's launch vehicle program. Frank Spurlock was one of the most accomplished and well regarded supervisors here at NASA Glenn (then Lewis) because of his exceptional technical achievements and beyond the call of duty care he took in developing his people. Frank personally derived the amazingly complex variational calculus equations and wrote the 3D computer program which NASA Lewis relied upon to calculate performance and trajectories for Atlas/Centaur and Titan/Centaur launch vehicles for almost 30 years. These trajectory data were then supplied to the launch vehicle contractors to facilitate their trajectory design & enable the steering coefficients to be calculated."
Missions like Voyager, Viking, Pioneer Venus, Cassini and many, many others could not have been easily done without Frank's personal efforts. He also cared deeply about the staff he hired and their continued development. For years, he went out to colleges to hire promising students regardless of their backgrounds. He then mentored those and others, dozens of young staff really, many of whom went on to be middle & even senior leaders at NASA.