Q&A · 5:12:27-5:20:49

Rebuilding HMS Renown as a modern surface-action leader

A hypothetical Renown rebuild keeps four forward 15-inch guns and replaces most of the ship's systems to support missiles, sensors, helicopters, and layered defense.

Question

How could the 1938 HMS Renown be converted into a viable modern surface combatant?

Short answer

Keep the forward heavy guns but rebuild nearly everything else around power generation, missiles, sensors, helicopters, and layered defense.

Notes

The proposed modern Renown retains the forward pair of twin 15-inch turrets but removes the old superstructure, secondary battery, machinery, and after turret. Gas turbines and new transmission would provide substantially more electrical power, with rafted engines intended to reduce noise. Separating the main sensor mast from the forward superstructure would help protect electronics from the heavy guns' firing shock. A transom stern is proposed for hydrodynamic reasons and to assist helicopter operations, although the panel notes that removing the after turret already releases substantial aviation space. The suggested hangar would hold three helicopters with repair space, or four at surge capacity, alongside separate takeoff and recovery positions. Four Phalanx systems and medium guns would provide close defense, with additional 57 mm or 40 mm weapons proposed as another layer. A 31-knot target is considered sufficient, without claiming that this would be the rebuilt ship's maximum speed. The intended role is a surface-action-group leader with missile defense, heavy gunfire, and helicopters for anti-submarine work.