 However, the Navy was impressed by the XSB3U's method of landing gear retraction, which provided a more streamlined surface after retraction than most other methods used at the time.Following the end of the evaluation, the XSB3U was retained by the Navy, and used for experimental and liaison purposes by the Navy, also being used by NACA at Langley Field for testing of tail loads starting in August 1938, continuing through January 1939 when the aircraft was returned to the Navy, being retired shortly thereafter.Bill Zock

William Zock (January 26, 1918 – April 29, 1988) was a professional Canadian football offensive lineman who played for the Toronto Argonauts and the Edmonton Eskimos from 1937 to 1954.