The G class enters construction just as the proposed machinery becomes available, making it the first destroyer class that could be designed around 850 psi boilers. The immediate questions concern power output, maximum speed, cruising range, and fuel efficiency. Experience from these ships would give the Royal Navy practical evidence before later destroyer programmes, including the Tribal class, made more ambitious machinery choices. A fleet-wide propulsion change would begin with operational learning as well as paper performance estimates.
Notable Point · 25:58-26:50
The G class becomes the destroyer test fleet
The G-class destroyers would be the first new destroyer design to test how 850 psi boilers change power, speed, range, and fuel efficiency at small-warship scale.