The R and S classes are credited with the same 36-knot speed, but their quoted cruising ranges differ. At 15 knots, the R-class figure is 3,400 nautical miles and the S-class figure is 2,700. Similar headline speed therefore did not make the two classes interchangeable in endurance.
Notable Point · 17:22-18:01
R and S destroyers share speed but differ in range
Quoted ranges at 15 knots fall from 3,400 nautical miles for the R class to 2,700 for the S class despite their shared 36-knot speed.