Q&A · 1:10:40-1:14:52

Could turbo-electric drive have helped Nelson and Rodney?

Electric transmission could have eased Nelson and Rodney's machinery-layout problem and improved redundancy, but at a weight and power-efficiency cost the Royal Navy rejected.

Question

Could turbo-electric drive have improved British capital ships such as Nelson and Rodney?

Short answer

Potentially; it offered flexible layout and redundancy, but the machinery was heavier and less power-efficient than the geared system Britain selected.

Notes

The Royal Navy settled on a boiler and power plant around 1933 to accelerate construction and simplify training; waiting until about 1936 is suggested as a way it might have obtained machinery closer to that of the Yorktown class. Nelson and Rodney offer a separate counterfactual because electric transmission could separate generator placement from propeller-shaft orientation. Multiple generator rooms could feed several shafts, allowing economical cruising on part of the plant and preserving propulsion after localized damage. The disadvantage remained the machinery's greater weight and lower power efficiency, which mattered even if the ships were not designed for exceptional speed.