Q&A · 3:40:05-3:40:26

The 15-inch Mark I succeeded by evolving proven work

The hurried 15-inch Mark I was less risky than it appears because it enlarged an established 13.5-inch design rather than starting over.

Question

Why did the rushed 15-inch Mark I gun still prove successful?

Short answer

It was an evolution of the proven 13.5-inch system, not a clean-sheet rush design.

Notes

The success of the British 15-inch Mark I does not disprove the dangers of rushed weapons development. Engineers enlarged the proven 13.5-inch gun rather than beginning with an unfamiliar clean-sheet mechanism. That evolutionary path carried established manufacturing methods and ballistic knowledge into the larger caliber. The program still moved quickly, but it limited the number of genuinely new problems that had to be solved at the same time.