When Stanley Sayres drove his platter-like hydroplane Slo-Mo-Shun IV to a world record over a mile straightaway earlier this month (TIME, July 10), veteran motorboatmen were dazzled by the 160 m.p.h. speed, but they took a restrained view of what the delicate Duralumin craft might do in racing competition. Over the bending Detroit River course of the Gold Cup race last week, Slo-Mo-Shun IV proved she was all right at that too.
This time, Owner Sayres, a Seattle Chrysler dealer, sat back and let Designer Ted Jones take charge of the demonstration. His job was to outdistance the other seven entries in...