The Thornycroft Coastal Motor Boat 55ft

Posted on 03 March 2026 by yonetici in 3d models, Outdoor, Ships, Toys, Vehicle Models | Leave a comment

Britain’s Secret Weapon of the Seas

From World War I Torpedo Raider to Modern 3D-Printed RC Model

Origins: A Bold Idea from Junior Officers

Few naval weapons have such an unlikely origin story as the Coastal Motor Boat (CMB). In the summer of 1915, three junior officers of the Harwich Striking Force — Lieutenants Hampden, Bremner, and Anson — hatched an audacious proposal: could a small, fast motor boat, armed with a torpedo, travel over enemy minefields and attack Imperial German Navy ships at anchor in their heavily defended bases?

The Admiralty gave tentative approval, and a Staff Requirement was issued for a new type of vessel to serve in the North Sea. The specifications were demanding. The boat had to be capable of at least 30 knots when fully loaded, carry enough fuel for a meaningful radius of action, and be armed with torpedoes, depth charges, or mines, supplemented by light machine guns. Several established shipbuilders were approached, but only one company believed the requirement could actually be met: John I. Thornycroft & Company.

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