Naval Historywith Dr. Alex

Q&A · 1:15:12-1:15:42

The compromise behind the 5.25-inch dual-purpose gun

The Royal Navy sought a heavy anti-aircraft weapon with cruiser-like reach but could not make a rapid-firing six-inch answer work.

Dido Class Light CruisersNaval Anti AircraftNaval Gunnery
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Question

What went wrong with the 5.25-inch gun, and why did the Royal Navy choose it?

Short answer

It was an attempt to combine cruiser-gun reach with heavy anti-aircraft fire after a rapid-firing six-inch solution proved impractical.

Notes

The 5.25-inch gun was a compromise. It was more powerful than a destroyer's weapon and intended to reach further in the heavy anti-aircraft role. The Navy would have preferred a rapid-firing six-inch dual-purpose answer, but could not make that concept practical. Working downward to 5.25 inches helps explain both the Dido's attraction and its operational compromises.