Why radar research took decades to mature

Royal Navy discussion of radar-like gunnery control concepts can be traced to officers, scientists, and engineers working before the First World War. Wartime needs then pushed effort back toward practical visual fire control, while postwar economic disruption slowed the return to speculative research. Research portfolios naturally contain many failures and projects whose value may not appear for decades. A program can therefore look wasteful when judged only by immediate returns even though a small number of successes eventually transform naval warfare. Radar's history is a long development path rather than a sudden wartime invention.