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The Supermarine Sea Urchin was an unbuilt British racing biplane flying boat designed by the Supermarine Aviation Works to compete in the 1924 Schneider Trophy. It was to be a single seat biplane powered by a Rolls-Royce Condor V-12 water cooled engine buried in the fuselage driving a pusher propeller mounted on the upper wing via geared shafts. It was abandoned without being built owing to problems with the engine and the transmission required to drive the propeller.

The Supermarine Sea Urchin was an unbuilt British racing biplane flying boat designed by the Supermarine Aviation Works to compete in the 1924 Schneider Trophy.1

Made by Supermarine.

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5 tips to help with your fear of flying

This article provides individuals with tools to overcome or at least manage a fear of flying. Flying can be an enjoyable experience if anxiety is not an issue.