Q&A · 2:05:18-2:09:30

Steam submarines, topweight, and other candidates for the worst wartime design mistakes

The discussion distinguishes an inherently hazardous concept from ships whose compromises or committee design wasted otherwise strong ingredients.

Question

What were the worst design mistakes of the two world wars?

Short answer

The Royal Navy's steam-powered K-class submarines are the panel's clearest First World War choice, while the Second World War offers several contenders rather than one uncontested failure.

Notes

A steam-propelled submarine had to combine fleet speed, boilers, funnels, and rapid diving in one hull, making the K class an especially unforgiving answer to the fleet-submarine problem. For the Second World War, the panel ranges across ill-judged aircraft roles, turret fighters, top-heavy destroyers, and German ships poorly suited to northern seas. The Bismarck class is described as a powerful collection of ingredients damaged by competing requirements and design-by-committee. Italian and French trial-speed incentives supply another warning: optimizing for a headline speed can leave fire control and fighting performance worse at the very condition being advertised.