Queen Mary as a triple-turret testbed

Would Queen Mary have been a lower-risk testbed for triple turrets and oil firing than a battleship?

Possibly. Her speed and one-off battlecruiser role make the idea plausible, but the ship remains a counterfactual rather than a documented Royal Navy proposal.

Martin Peacock's comment proposes Queen Mary as a lower-risk testbed for triple turrets and oil fuel than a battleship. The historical ship carried eight 13.5-inch guns in four twin mounts, reached about 28 knots, and had a maximum belt of nine inches and a range of roughly 5,610 nautical miles. That gives the counterfactual a concrete starting point. Three triple turrets could be placed all forward or in A, B, and X positions, while oil firing could support more speed or protection. The idea is plausible enough to guide further archival research, while the exact ship remains undocumented in this passage.