The long programme crossed the Thatcher, Major, Blair, and Brown governments, bringing changing views of defence spending into its development. Integrated electric propulsion offered flexible machinery placement, separation for survivability, and the ability to maintain one generating unit while others kept the ship running. Those advantages required enough independent generation to isolate equipment without exhausting the remaining supply. Two expensive gas turbines were an understandable economy, while additional conventional diesels offered a comparatively inexpensive way to improve resilience. Four original diesels would have produced eight megawatts, although that remained far below the turbines' combined 43 megawatts. Even the later nine-megawatt diesel installation provides only a fraction of turbine output. The minimum generating fit weakened the resilience that had helped justify a separate British destroyer design for worldwide deployment.
Chapter · 50:35-55:08
Electric propulsion promised flexibility but lacked redundancy
Integrated electric propulsion could distribute machinery, isolate equipment for maintenance, and accept future loads, but Type 45 entered service with too little generating redundancy to exploit those strengths.