Test pilot
Gloster's Chief Test pilot Bill Waterton flew with Frost in the second seat; to the test pilot, this was a revelation: "(Frost was)...very much the keen English public schoolboy type. Here was another delightful contrast to England, where I was never able to find a designer with spare time enough to fly in his own creation." Frost considered it important to get a feel for the aircraft and its systems. He even tested the CF-100's ejection seat by becoming a test subject himself. Early flights revealed the great potential of the aircraft but also showed the flaw in the spar was dangerous. With the crash of the second CF-100 prototype and early production CF-100s delivered to the RCAF without the final modifications to the spar, Frost was blamed for the delays and removed as CF-100 Project Designer in early 1952.