G3 speed versus N3 gun power

The G3 was the longer, much faster successor to the battlecruiser line, while the N3 exchanged machinery power and speed for heavier armor and nine 18-inch guns. Their standard displacements differed by only about 500 tons. Their beams were also the same, so the shorter N3 gained little dockyard flexibility from sacrificing speed. A more useful N3 might have retained its armor while adopting three shafts and roughly 90,000 horsepower for a speed near 28 knots.