The Capitani Romani class ships

I had been impressed by a report in Warship, from the 1970's, that one of the Capitani Romani class had made 43 knots in service. Frank Fox told me that he had found out the circumstances. The voyage was made essentially as a trial, with the determination to make a very high speed. That would mean that the ship was very light, as that was the only way to reach such a high speed. That probably meant running the plant at some percent of overload, as well, to achieve a very high power. If the ship were at a more normal service displacement, it would likely not be able to achieve 40 knots. At least, my experiments with my Warship General Design program and SpringSharp would indicate that.