Jet Boat Goes Through Paces - The "White Hawk,"jet-powered hydrofoil speedboat, raises a spray screen as it speeds over Britain's Lake Windermere at about 90 miles an hour during a trial run Thursday. Mrs. Stella Hanning-Lee, wife of the boat's owner, naval architect Frank Hanning Lee, hopes to set a new speed record in the sleek craft. British speed ace John Cobb set a mark of 206. 89 m.p.h. before he was killed two weeks ago when his boat exploded. October 11, 1952. (Photo by AP Wirephoto).