The V25 boats varied substantially within their nominal class. Maximum displacement ranged from 971 to 1,188 tons, and the batch with the greatest maximum displacement was different from the batch with the greatest design displacement. Trial speeds ranged from about 32 to 36 knots against intended speeds of 33.5 to 34 knots. Different marine turbine sets, hull shapes, lengths, and beams contributed to that variation. Some boats also appear to have exchanged the stern gun for minelaying or minesweeping equipment. The discussion suggests as many as eleven subclasses and treats the series as continuing development through wartime production.
Notable Point · 4:57-7:52
V25 production evolves through different hulls and turbines
Differences in displacement, trial speed, turbines, and hull dimensions make V25 an evolving production series with numerous subclasses.